The Anonymous Widower

Would A Mutant Many-Parent Child Help To Solve London’s London’s Transport Problems?

London needs to increase the capacity of its public transport system, as the City continues to get larger and larger.

Current Major Projects

There are only three major rail projects ongoing in London at the present time.

The Bank Station Upgrade

The Bank Station Upgrade appears to be progressing well, albeit perhaps a bit later due to the pandemic.

It is a complex project and from what I have heard and observed, it has been well designed and planned.

The Barking Riverside Extension

As with the Bank Station Upgrade the Barking Riverside Extension, appears to be going reasonably well.

But compared to that project, it is a relatively simple project.

Crossrail

Crossrail is in trouble, after what many believe was a very good tunnelling phase of the project.

But then tunnels under London usually seem to go well. I can remember the Victoria Line tunnelling and many other under London since the 1960s and all of these tunnels seem to have been dug without trouble. As I write, there don’t seem to be any tunneling problems with the Thames Tideway Tunnel.

Crossrail now has been reduced to a series of station builds and rebuilds, some of which are as large as the Bank Station Upgrade, with other ongoing projects like the testing of trains and systems.

So why are some of these stations running late in their delivery?

If you walk along the route of Crossrail in the City of London and through Clerkenwell and the West End, it is one massive building side as developers raise massive clusters of new developments around and above the Crossrail stations.

The picture shows Farrington station’s Eastern entrance, with a new development on top.

This one wasn’t a big one, but it went up in record time.

These buildings are often funded by Sovereign Wealth Funds, who want their buildings finished ASAP and as they have bottomless pockets, they are prepared to pay more to get the builders and tradesmen they need.

And where did they get them from? Other projects, including Crossrail.

This problem happened in Aberdeen at the height of the oil boom in the last century.

I also think that Brexit worsened the problem, as workers from mainland EU moved to large projects closer to home, like Stuttgart station and Berlin airport, that were very much in trouble and could have been offering premium salaries as well!

The solution would have been to phase developments so that the limited pool of workers was not exhausted.

But that probably wouldn’t have suited the politicians for all sorts of reasons.

  • An uncompleted building doesn’t bring in money and jobs.
  • Early completion must improve chances of letting the building.
  • Delaying the building would probably have meant fewer holidays for politicians in exotic locations.

Hopefully, a comprehensive enquiry into the lateness of Crossrail will provide answers.

High Speed Two

High Speed Two is to my mind a London local project. But only in a secondary way!

  • Rebuilding Euston station will improve Underground connections and interchange at Euston and Euston Square stations.
  • It is claimed by High Speed Two, that the rebuilt Euston station will create 16000 jobs and 2200 homes.
  • High Speed Two will enable massive development at Old Oak Common, with tens of thousands of homes and jobs.
  • Old Oak Common station will be a very important rail hub in North-West London.

With seventeen trains per hour (tph) between Euston and Old Oak Common will High Speed Two attract local traffic?

  • I suspect High Speed Two between Manchester Airport and Manchester Piccadilly and between Birmingham Interchange and Birmingham Curzon Street will also attract local traffic.
  • I’ve used TGVs between Nice and Antibes.
  • Tourists might visit, just like they did and still do at the Olympic Park.
  • Many Londoners will join High Speed Two at Old Oak Common.

Some wag will suggest putting it on the Tube Map. But is it such a stupid idea?

Where Does London Need More Rail Services?

Having lived in London on and off for over seventy years, I feel the worst areas for rail links are probably.

  • North West London
  • South East London
  • South Central London between Wimbledon and Croydon.
  • South West London

Note.

  1. Over the years, there is no doubt that East and North London have improved considerably, with the development of the East London, North London and Gospel Oak to Barking Lines.
  2. Thameslink has been improved in North London and now it is being supported with improvements to the Northern City Line. Both routes now have new Siemens trains.
  3. Crossrail will produce major improvements in West, East and South East London.
  4. Building of a new Penge Interchange station, which I wrote about in Penge Interchange could improve routes to and from South East London.
  5. Hopefully the work in recent years at Waterloo will improve suburban services out of Waterloo. In An Analysis Of Waterloo Suburban Services Proposed To Move To Crossrail 2, I showed that four tph could be run to Chessington South, Epsom, Hampton Court and Shepperton stations.

It looks like North West and South Central London are missing out.

How Can Services Be Improved In North West London?

There are radial routes from the centre of London to the suburbs.

Starting from the North and going to the West, there are the following lines.

When I used to live at Cockfosters as a child,  to visit my many cousins in North West London, there was no alternative but to use a bus and take well over an hour each way.

There are now some circular rail routes in London but nothing in the North West of the capital.

The Dudding Hill Line And The West London Orbital Railway

But there is the little-used freight route called Dudding Hill Line.

  • It runs between Cricklewood on the Midland Main Line and Acton Central on the North London Line.
  • It is four miles of double-track railway.

This YouTube video shows a cab ride from Acton to Cricklewood.

Plans exist to turn it into the West London Orbital Railway, which will run two services.

  • West Hampstead and Hounslow via Cricklewood, Neasden, Harlesden, Old Oak Common Lane, Acton Central, South Acton, Lionel Road, Brentford, Syon Lane and Isleworth
  • Hendon and Kew Bridge via Brent Cross West, Neasden, Harlesden, Old Oak Common Lane, Acton Central, South Acton

Note.

  1. The proposed frequency of both services is four tph.
  2. There would be some stations to be built, but the track exists.
  3. The route is technically feasible.
  4. The route would connect West London to High Speed Two.
  5. There would be little disruption whilst it was built.
  6. The services could be run by dual-voltage battery-electric trains charged on the electrification at both ends of the route.
  7. The scheme represents a high value for money, with a benefit-cost ratio (BCR) of 2.2.

On the other hand, the scheme has two serious problems, as far as the current London Mayor is concerned.

  • Transport for London has no money, partly because of London’s Fare Freeze.
  • The project is not in South London.

This important and value-for-money project will not be built, whilst Sadiq Khan is still Mayor of London.

Harlesden Interchange

I believe that if we get the interchanges right on the West London Orbital Railway correct we can do things like.

  • Increase the benefit cost ratio.
  • Link the route to South London to make the Mayor a bit happier about the North London Scheme.

This Google Map shows Harlesden station.

Note.

  1. The Bakerloo Line/Watford DC Line running North-West/South-East through Harlesden station.
  2. The West Coast Main Line in the Southern section of the map.
  3. The Dudding Hill Line running North-South across the map.

Platforms will be built on the Dudding Hill Line to connect that would probably be new or extended platforms in the current Harlesden station to enable interchange between the West London Orbital and the Watford DC Lines.

I also think there is a possibility that platforms could be added to the slow tracks of the West Coast Main Line, so that suburban services into London Euston can also connect to the West London Orbital Line.

It would also enable a connection between Southern’s Clapham Junction and Milton Keynes service and the West London Orbital Railway.

Looking at this from various angles, I think that an architect good at designing three-dimensional structures could develop a quality Harlesden Interchange station.

Neasden Interchange

Like Harlesden, Neasden is another possibility for a comprehensive interchange.

This Google Map shows Neasden station.

Note.

  1. There are a lot of lines going through Neasden station.
  2. The Dudding Hill Line goes across the South-East corner of the map.
  3. There is plenty of space in the area.

This map from cartometro.com shows the lines in the area.

Note.

  1. The Dudding Hill Line is indicated by the former Dudding Hill station.
  2. The red tracks are Metropolitan Line tracks.
  3. The silver tracks are Jubilee Line tracks.
  4. The Southerly pair of lines through Neasden and Dollis Hill stations are Chiltern’s lines into Marylebone.
  5. The Chiltern tracks divide to the West of Neasden station, with the Aylesbury line following the other tracks and the Chiltern Main Line diverging to the West.
  6. London’s largest Underground Depot at Neasden, lies to the North-West in an area of London noted for few merits with the North Circular Road passing through.

I wonder, if the station and the depot offers a unique opportunity to offer large scale additions to London’s housing stock over the top of a rebuilt station and depot.

This Google Map shows the wider area.

Note.

  1. Much of the depot appears to be open-air stabling for trains.
  2. The North Circular Road passes North-South between the depot and Neasden station.
  3. The Dudding Hill Line cuts across the South-East corner of the map.
  4. This corner of the map is labelled as Dudden Hill.
  5. According to Wikipedia, Dudding Hill is considered a more genteel spelling of Dudden Hill and could be as old as 1544.

It looks as if it would be relatively easy to develop over the top of the depot to create housing, industrial or commercial properties.

But why stop there and cover both the North Circular Road and the six tracks through Neasden station?

Neasden station could be rebuilt into a station with platforms on the following lines.

  • Metropolitan Line
  • Jubilee Line
  • Chiltern Lines
  • Dudding Hill Lines

Note.

  1. I estimate that Chiltern has a train about every six minutes, so some could stop.
  2. There might be space for a bay platform for Chiltern.

Neasden could be a major housing and transport hub.

  • There could be large amounts of parking.
  • Road access would be good.
  • It would have good rail connections.
  • It could have a bus interchange.
  • London needs housing.

It might even be an alternative to Chiltern’s plan for a West Hampstead Interchange.

The Mayor of London, Transport for London and the Borough of Brent need to be bold!

Improvements To Chiltern’s Routes

Chiltern Railways have some plans that could improve services in North West London.

Using The Acton-Northolt Line

Wikipedia says this about using the Acton-Northolt Line to access new platforms at Old Oak Common station.

Upgrading the Acton–Northolt line (formerly the “New North Main Line”) to new platforms at Old Oak Common. This upgrade will also extend to London Paddington to increase capacity on the Chiltern Main Line as there is no room to expand the station at Marylebone.

This scheme has merit.

  • The platforms would be connected to the Chiltern Main Line along the route of a partly-disused railway.
  • The route could be double-tracked.
  • There must be space for at least two new platforms.
  • The new platforms could easily handle four tph.
  • There may be a case for some new stations.

The scheme could add valuable extra capacity for Chiltern.

A Chiltern Metro

Wikipedia says this about a  proposed metro service between Marylebone and West Ruislip stations.

  • The Metro would have a frequency of four tph.
  • It would call at Wembley Stadium, Sudbury & Harrow Road, Sudbury Hill Harrow, Northolt Park and South Ruislip.
  • The service would require a reversing facility at West Ruislip.
  • There would need to be passing loops at Sudbury Hill Harrow, and  Wembley Stadium.

Given that the Chiltern Metro was first proposed over a decade ago, perhaps the concept could be increased in scope.

  • Housing and other developments along the route may suggest that a station further out like High Wycombe might be a better terminal.
  • ERTMS in-cab digital signalling is likely to be installed at some time, which would decrease headways between trains and allow more services.
  • Electrification is likely in some form before 2040 and this will improve train performance.
  • If Neasden station were to be rebuilt, as a comprehensive transport and residential development, I believe that this Metro service should also call at Neasden, as it would complement the West London Orbital Railway.

I believe that a review of the Chiltern Metro may mean, that an improved version is worth building.

Improvements To The Milton Keynes And Clapham Junction Service

I feel that this service could be key in improving services between North London and South London via the West London Line and High Speed Two’s station at Old Oak Common.

Currently, this service is as follows.

  • It runs between Milton Keynes and Clapham Junction stations.
  • It has a frequency of one tph.
  • It calls at Bletchley, Leighton Buzzard, Tring, Berkhamsted, Hemel Hempstead, Watford Junction, Harrow & Wealdstone, Wembley Central, Shepherd’s Bush, Kensington (Olympia), West Brompton and Imperial Wharf stations.
  • The service used to extend to South Croydon via Wandsworth Common, Balham, Streatham Common, Norbury, Thornton Heath, Selhurst and East Croydon.
  • It uses Class 377 trains.
  • It shares parts of the route with the London Overground.

I also think it has various issues and questions with respect to the future.

  • The Class 377 trains are only 100 mph units, whereas the outer suburban trains on the West Coast Main Line are 110 mph Class 350 trains, which will soon be replaced by 110 mph Class 730 trains. Do the slower trains call timetabling problems?
  • Is one tph enough?
  • The route doesn’t serve High Speed Two at Old Oak Common station.
  • Is the service run by the right operator?
  • What is the ideal Southern terminal?

These are my thoughts on the various issues.

The Service As A North-South Link

A friend, who lives in South London has told me, that if you go to an event at Wembley stadium the route is busy.

On the other hand, I’ve used it at midday on a Tuesday and found the trains empty.

But developed properly it could connect the following.

  • Milton Keynes Central
  • Bletchley for the East West Rail Link
  • Watford for the West Coast Main Line to the North
  • Wembley Central for Wembley Stadium and other entertainments
  • Willesden Junction for the North London Line
  • Hythe Road for High Speed Two, Crossrail and the Great Western Railway
  • Shepherd’s Bush for the shopping.
  • Clapham Junction for most of the South London and the South of England

It would be a very useful cross-London route to complement Thameslink and the East London Line.

The Frequency

The current Milton Keynes and Clapham Junction has a frequency of one tph.

This may be enough for some parts of the route, as other services also provide services.

But many would argue, that perhaps South of Watford Junction, the service needs to be increased to connect the area to Old Oak Common and Clapham Junction.

I feel that High Speed Two, Crossrail and the Great Western Railway give so much connectivity, that between Clapham Junction and Willesden Junction needs a frequency of at least eight tph.

As the North London Line and the Watford DC Line are working at a frequency of four tph, this could indicate that a four tph direct service Watford Junction and Clapham Junction be ideal. Perhaps, it could continue North to Milton Keynes with a frequency of two tph.

The Trains

I am absolutely certain, that the full service needs to be operated by dual voltage trains, that are capable of running at 110 mph.

The Class 350/1 trains of West Midlands Trains would probably be ideal for the full service.

  • They are dual voltage trains.
  • They are 110 mph trains.
  • They have a long distance interior.

They are being replaced with new Class 730 trains, so would be available.

If some services were running only as far North as Watford Junction, these could be either Class 378 or Class 710 trains of the London Overground.

The Connection To The West London Line And High Speed Two

This map from Wikipedia by Cnbrb shows the latest iteration of the lines at Old Oak Common station.

Note.

  1. The green route is taken by the Milton Keynes and Clapham Junction trains.
  2. The bright blue is High Speed Two.
  3. The purple is Crossrail.
  4. The orange is the Overground
  5. Hythe Road station is proposed for the West London Line to connect to Old Oak Common station for High Speed Two.
  6. Hythe Road station will have a bay platform to turn trains from the South.
  7. Old Oak Common Lane station is proposed for the North London Line to connect to Old Oak Common station for High Speed Two.

But where is the connection between the Milton Keynes and Clapham Junction service and Old Oak Common station for High Speed Two?

  • Access from the South is not a problem as the Overground can be used to Hythe Road station.
  • Extra services from the South can be run to and from the bay platform at Hythe Road station.
  • Access from the East is not a problem as the Overground can be used to Hythe Road station.
  • How do passengers go between say Wembley Central and Heathrow?

In addition for access from the West is the Overground can be used to Old Oak Common Lane station.

But as things stand at the moment the Milton Keynes and Clapham Junction service bypasses Hythe Road station and the only ways to go from Milton Keynes to Old Oak Common station for either High Speed Two, Crossrail or the Great Western is to do one of the following.

  • Change to the Watford DC Line at Watford Junction, Harrow & Wealdstone or Wembley Central and then change to the Overground at Willesden Junction for either Old Oak Common Lane or Hythe Road station.
  • Continue South to Shepherd’s Bush station, cross over to the other platform and then come back to Hythe Road station.
  • Go via Euston station. OK for High Speed Two, but not for Crossrail or the Great Western.

They cannot be serious!

I hope that there is a cunning plan to enable the Milton Keynes and Clapham Junction service to connect.

Whilst on the subject of connections at Old Oak Common, where is the promised connection of Crossrail to the West Coast Main Line?

Were all these connections just kicked into the long grass and quietly forgotten, as they were deemed too difficult and/or expensive?

I think serious questions need to be asked about the design of Crossrail and High Speed Two at Old Oak Common.

Why weren’t Crossrail and High Speed Two designed to connect directly to the London Overground at Willesden Junction station perhaps by the use of a North South people mover serving the following lines?

  • Bakerloo, Watford DC, West Coast Main and West London Orbital Lines at a rebuilt Harlesden station.
  • London Overground at the high-level Willesden Junction station.
  • High Speed Two
  • Crossrail and the Great Western Railway
  • The new Chiltern platforms.
  • Central Line at East Acton station.

Note.

  1. Hythe Road and Old Oak Common stations would not be needed.
  2. The Milton Keynes and Clapham Junction service would call additionally at the rebuilt Harlesden station.

The current design of Old Oak Common stinks like a horse designed by a committee!

The Northern Terminal

I suggested earlier that some trains use Watford Junction and others use Milton Keynes Central.

Both stations have the capacity and the connectivity.

The Southern Terminal

In the last ten years, South Croydon, East Croydon and Clapham Junction have been used as the Southern terminal.

Thameslink seems to have chosen its various terminals to satisfaction of the travelling public, so perhaps the same method or personnel should be used.

The Operator

The Gibb Report said that this service should be transferred to the London Overground and I wrote about this proposal in Gibb Report – East Croydon – Milton Keynes Route Should Be Transferred To London Overground.

This is one suggestion, but I do wonder, if it should be transferred to West Midlands Trains and run in conjunction with their West Coast Main Line services.

  • The service needs 110 mph trains.
  • Timetabling and operation should be easier.
  • London Overground trains don’t have a long-distance interior.

On the other hand, trains running between Watford Junction and Clapham Junction would probably be better if they were London Overground trains.

Conclusion

I believe that by using the current network and some modern trains and signalling, the passenger services to the West of the capital can be substantially improved.

 

 

 

 

May 1, 2021 Posted by | Transport | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | 12 Comments

Air-Conditioned Piccadilly Line Train Designs Presented

The title of this post, is the same as that of this article on Railway Gazette.

The article has four pictures of the final design of the new trains for the Piccadilly Line and the pictures don’t seem to be the same as those I took of the mock-up in October 2013 and can be seen in Siemens’ View Of The Future Of The Underground.

  • The design has a less dramatic nose compared to the mock-up.
  • It also appears to be taller.
  • Judging by the external profile, the design has a clerestory to perhaps add a couple of inches.
  • The seats appear to have a chunky profile. Is the air-conditioning partly behind the seats.

The interior seems to borrow heavily on the design for the London Overground’s Class 710 train.

Note.

  1. The air-conditioning outlets in front of or underneath the seats.
  2. No grilles behind the seats.
  3. The Class 710 train has a clerestory for extra height, but it is not visible on the outside. Does the one on the Siemens’ design have grilles from air entry or exit?

These are some views of seats in current Underground stock.

Note.

  1. The Piccadilly Line trains were fully refurbished in 2001.
  2. The Northern Line trains were fully refurbished in 2013.
  3. The grilles behind the seats on the Northern Line trains.

You can see a progression through the various designs, with the Class 710 trains

It looks like Siemens are using a similar interior layout to current trains on the Underground and the Overground.

A few thoughts.

Heated Floors

Some Bombardier Aventras like Greater Anglia’s Class 720 trains have heated floors. Will Siemens copy this idea?

These trains will go to some of the coldest parts of the Underground around Cockfosters.

USB Charging

This screen-capture from one of the Siemens’ pictures shows the front of the seats.

I thought for a moment, that there was a USB charge point in the front of the seat, but on second thoughts, that is just a fitting to enable extra vertical grab rails.

Siemens should put USB charge points in the arm rests, as Vivarail have done.

Good design is often simple.

Walk-Through Cars

The Railway Gazette article says this about walk-through cars.

The longer cars and walk-through interior of the articulated design would maximise the usable interior space, increasing capacity by 10%.

They say nothing about what I think is there biggest advantage – Passengers can freely circulate in the train, to perhaps get a better seat or be better placed for a quick exit.

Do women feel less vulnerable in wall-through trains?

Step-Free Entry

One of the good points of the mock-up in 2013 was that entrance into the train was step-free, as this picture shows.

But look at this screen-capture for the detailed design.

The doors now seem a couple of inches above the platform.

Have the designers removed a must-have feature?

German trains have a terrible reputation for not being step-free between train and platform, but if Stadler and Merseyrail can do it with the new Class 777 trains, then surely it can be done on the London Underground.

Front End

The previous two pictures do show the front end of the mock-up and final design well.

I do wonder, if the original design with the bar across didn’t go down to well with drivers.

  • The driver on most trains sits to the left.
  • Trains in the UK generally run on the left.
  • Signals on the Underground are usually placed on the left.

So did the bar across get in the way of looking across at passengers, as a train entered a station?

Driver’s Doors

The previous two pictures also show that the original mock-up is without a door for the driver, but that these have been added to the final design.

Perhaps drivers feel a separate door is necessary, as it can’t be blocked by baggage, bicycles or buggies.

Train Length

In Thoughts On The New Tube For London, I speculated about train length and feel that with clever cab design, that the trains can be a bit longer than the platform with the walk-through design.

After all on the East London Line at a few stations, the platforms aren’t long enough for the five-car trains and passengers in the last car are just asked to walk forward.

This picture shows what happens on the Overground at Canada Water station.

Those travelling in the last car of the train have to walk forward to the front doors of the car to exit. I suspect that with Siemens new trains, this will be the case on the Piccadilly Line.

The big advantage is that it avoids lengthening the platforms, which would be extremely tricky and very expensive.

So will the new Siemens trains be made longer, by allowing overhang into the tunnel at the rear and messaging to inform passengers?

I think they might!

Wikipedia gives the length of the new Siemens 2024 Stock as 113.7 metres, which compares with the 106.8 metres of the current 1973 Stock.

So the new trains are 6.9 metres longer.

Does that mean that if the front of the train is at the same position it is now, the rear end of the train will be overhanging the platform, by almost seven metres?

Judging by what happens on the East London Line, I think it would be feasible. It could even be a few metres longer, in which case the first set of double-doors would be outside the platform and wouldn’t open.

Seats Per Car

I believe this screen-capture from one of Siemens pictures shows the view of one of the end cars looking towards the driver’s cab.

Note.

  1. The red and green labels on the door to the driver’s compartment at the far end.
  2. The two pairs of passenger doors and the lobbies with the black floors.
  3. The six banks of seats, each of which have six individual seats.

This means that the driver cars each have thirty-six seats.

According to Wikipedia, each new Siemens train has nine cars and a total of 268 seats.

So that means that the middle seven cars have a total of 196 seats or twenty-eight in each car. What convenient numbers!

Could that mean that the seven intermediate cars have four banks of seven seats arranged around a lobby with a pair of double-doors on both sides?

Could the intermediate cars have just one set of wide doors? I shall be taking a tape measure and my camera to a Class 710 train, to see what Bombardier have done.

So a new Siemens train might look something like this.

  • Car 1 – driver cab – six seats – double-door/lobby – six seats – double-door/lobby – six seats
  • Car 2 – seven seats – double-door/lobby – seven seats
  • Car 3 – seven seats – double-door/lobby – seven seats
  • Car 4 – seven seats – double-door/lobby – seven seats
  • Car 5 – seven seats – double-door/lobby – seven seats
  • Car 6 – seven seats – double-door/lobby – seven seats
  • Car 7 – seven seats – double-door/lobby – seven seats
  • Car 8 – seven seats – double-door/lobby – seven seats
  • Car 9 – six seats – double-door/lobby – six seats – double-door/lobby – six seats- driver cab

Note.

  1. There will be a maximum of fourteen seats between any two entrance and exit lobbies.
  2. The train will have eleven sets of doors on either side.
  3. Trains of different lengths can be made for the Waterloo and City Line, where trains are shorter, and the Jubilee, where trains are longer, by just removing or adding intermediate cars.

For the Piccadilly Line, so long as the distance between the front of the train and the first set of doors is greater than 6.9 metres, these trains can be run using the overhanging into the tunnel method used on the East London Line of the London Overground.

Observations From The Underground And Overground

I went for a look and can say this.

  • The seats on Overground Class 710 trains and Underground S Stock trains have a width of 0.5 metres. So is this a Transport for London standard?
  • Double doors on both trains are around 1.5 metres wide.

On Class 710 trains, some cars have a run of fourteen seats. Is it a design clue for Transport for London train interiors?

There must be some proof somewhere that fourteen 0.5 metre seats and two 1.5 metre lobbies can handle large numbers of passengers.

The new Siemens trains will have an articulated join in the middle.

Could The Trains Be Lengthened?

The only things we know about the lengths of the cars of the new Siemens trains are.

  • The average length of cars is 12.6 metres.
  • The two driving cars are probably identical.
  • The seven intermediate cars are probably identical.
  • The distance between the end of the train and the first set of doors must be long enough to allow the first set of doors to open on the platform, with nearly seven metres of the train in the tunnel.

If we assume that the length of the intermediate car is X metres and it has two banks of seats and one lobby, then the driving car with three banks of seats, two lobbies and a driving cab could be almost twice as long.

I can do a little calculation.

How long would the driver cars be for various lengths of intermediate car?

As the driver car is effectively an intermediate car with an extra pair of doors/lobbie and an overhang containing another set of sets and the driving cab, I can also estimate the between the end of the train and the first set of doors, by subtracting the intermediate car length and two metres for the lobby from the driver car length

  • 9 metres – 25.35 metres – 14.35 metres
  • 9.5 metres – 23.6 metres – 12.1 metres
  • 10 metres – 21.85 metres – 9.85 metres
  • 10.5 metres – 20.1 metres – 7.6 metres
  • 11 metres – 18.35 metres – 5.35 metres
  • 12 metres – 14.85 metres – 0.85 metres

Note.

  1. The three figures are intermediate car length, driver car length and an estimate of the distance between the end of the train and the first set of doors.
  2. I shall improve this table, when I get the measurements from a Class 710 train.
  3. As there is a need for at least an overhang into the tunnel of at least 6.9 metres, it looks like intermediate cars can’t be longer than 10.5 metres.

Suppose that the intermediate car length  is 10.5 metres.

Adding an extra car would mean that the new train length would be 124.2 metres, which would be 17.4 metres longer than the current Piccadilly Line 1973 Stock train.

This would be an overhang of 8.7 metres at both ends of the train, which would probably mean that the train wouldn’t fit the route, as the overhang is not long enough to accommodate it.

But with a length of ten metres, the overhang would be only 8.45 metres, which would appear to be feasible.

I wonder, if it would be possible with appropropriate modifications to the tunnel mouths and by using in-cab signalling to run ten car trains, if the intermediate cars were limited to ten metres.

  • It looks to be possible mathematically.
  • There would need to be no modifications to the platforms.
  • There would be a ten percent increase in capacity.

It will hopefully come clear, when Siemens release the length of the driver and intermediate cars.

I believe that it is possible, that Siemens have designed these trains, so they can be extended without having to lengthen the platforms.

 

March 13, 2021 Posted by | Transport | , , , , , , | 1 Comment

Crossrail And Ealing Broadway Station

This map from carto.metro.free.fr shows the track layout at Ealing Broadway station.

These are lines from North to South through the station.

  • The lines shown in green are the District Line, which terminates in platforms 9, 8 and 7.
  • The lines shown in red are the Central Line, which terminates in platforms 6 and 5.
  • The lines shown in dark blue are the slow lines through platforms 4 and 3, which carry Crossrail and other slow services. Platform 4 is the London-bound platform.
  • The lines shown in black are the fast lines through platforms 2 and 1, which carry all fast services. Platform 2 is the London-bound platform.

These are my thoughts on the layout.

Eastbound Crossrail Trains

Passengers travelling East on Crossrail, will be able to walk across from Platform 4 to any of the terminal platforms numbered 5 to 9, for the Central and District Lines.

This picture taken from a London-bound train in Platform 4 shows a Central Line train in Platform 5.

They are only a short walk apart and passengers who are changing trains will probably position themselves in the rear of the Crossrail train.

Passengers entering the station will just walk across to Platform 4 to use Crossrail to Central London and beyond.

I doubt there will be many passengers arriving on the Central and District Lines, who will want to go back on themselves to Central London. If say they lived near a station between West Acton and Marble Arch, and wanted to go East on Crossrail, they’d probably change between the Central Line and Crossrail at Bond Street station.

Westbound Crossrail Trains

Passengers needing to access the Westbound Crossrail trains in Platform 3, will have to use the bridge over the slow lines carrying Crossrail.

Because of the multiple interchanges between the Central Line and Crossrail, depending on where you join the Central Line, you will probably change to Westbound Crossrail trains at different points.

  • Start a journey between West Acton and Marble Arch and you’ll probably change to the Westbound Crossrail at Ealing Broadway.
  • Start a journey at Oxford Circus and you’ll probably change to the Westbound Crossrail at Bond Street.
  • Start a journey between Bank and Holborn and you’ll probably change to the Westbound Crossrail at Tottenham Court Road.
  • East of Bank, there are two interchanges at Liverpool Street and Stratford.

It is very much a ducker and diver’s paradise.

Escalators And Lifts Could Be Needed At Ealing Broadway Station

There could be quite a number of passengers needing to cross to and from Platform 3, who will mainly be in two categories.

  • Westbound passengers leaving the station.
  • Westbound passengers arriving on the Central and District Lines wanting to continue West on Crossrail.

In addition, there will be a large number of passengers entering the station, wanting to catch trains to Central London.

To cater for these passenger flows, there must be a full set of up-and-down escalators and lifts for the following.

  • Platforms 4 to 9 in the main station.
  • Platform 3 on the Westbound slow line for Crossrail and other slow services.

Wikipedia says four lifts will be added.

It should be noted, that Dlston Junction station handles similar numbers of passengers to Ealing Broadway with one lift and one wide double staircase.

Escalators would future proof the station for more services.

Will District Line Services Be Replaced By Piccadilly Line Services?

There are rumours, that the District Line services at Ealing Broadway station will be replaced by Piccadilly Line services.

Reportedly, this will do the following.

  • Allow frequency increases on the District Line to Richmond and Wimbledon.
  • Allow a frequency increase on the core section of the Piccadilly Line.

Consider

  • Whatever service uses Ealing Broadway will have little effect on the operation of the station.
  • Acton Town, Hammersmith, Barons Court, Earl’s Court, Gloucester Road and South Kensington stations are all served by both the District and Piccadilly Lines.
  • The Piccadilly Line could be an alternative to Crossrail 2 between Green Park and Kings Cross.
  • The Piccadilly Line will have new high-capacity trains in a few years.

Will the change, which means the Piccadilly Line has a capacity increase, allow Crossrail 2 to be delayed by a couple of years?

  • This would ease, Transport for London’s cash flow.
  • It might also allow a better plan for building Crossrail 2

It will be interesting to see the full details of the swapping of lines.

December 9, 2019 Posted by | Transport | , , , , , | 6 Comments

Could Rail Access To Heathrow Be Formed Of The Best Bits Of Various Schemes, But Discounting HS4Air And Windsor Link Railway?

This post is an updated version of Could Rail Access To Heathrow Be Formed Of The Best Bits Of Various Schemes?, which has been written to fit with the situation as it exists in April 2019.

  • HS4Air has not been accepted.
  • Windsor Link Railway has not been accepted.
  • The scheme is Heathrow-only.

Various schemes have been proposed to improve rail access to Heathrow.

There are also two schemes in progress, that will improve rail access to Heathrow.

  • Crossrail, which will open to Heathrow  in 2019.
  • Piccadilly Line Upgrade, which will be complete in 2025.

I also believe that if the West London Orbital Railway is created, then this could have a positive affect on travelling to and from Heathrow.

Heathrow In The Future

Heathrow are disclosing a master plan, for rebuilding a lot of the airport to make it more efficient and up with the best.

  • There will be two main terminals; Heathrow West and Heathrow East with satellites in between handling the actual planes.
  • These two terminals and the satellites will be between the two existing runways, with a passenger and baggage transport system beneath.
  • Terminal Five will become Heathrow West.
  • An extended Terminal Two will become Heathrow East.
  • Crossrail, Heathrow Express and the Underground will serve both main terminals.

I believe that this rebuilding will happen, whether or not a third runway is built and it could start in the next few years.

Heathrow’s Pollution Footprint

Heathrow is a big polluter, but it is not so much the planes, as the diesel cars, buses and trucks serving the airport.

Heathrow’s Third Runway

Heathrow’s third runway and another terminal could be built North of the current two runways.

These factors would effect the chance of it being built and the eventual opening  date.

  • The development of extra services on High Speed One.
  • The opening of High Speed Two.
  • The building of a second runway at Gatwick.
  • Extra capacity at other London airports, like City, Luton, Southend and Stansted.
  • Politics, as many possible leaders of the Conservative and Labour parties don’t want it built.

I have a feeling that Heathrow’s Third Runway could be a back-burner project for decades.

I do think though, that the space underneath the third runway could be used as a rail terminal.

Uses For Improved Rail Access

There are several uses for improved rail access to Heathrow.

Passengers

Many passengers feel they must drive to and from Heathrow.

Next year, Crossrail will connect Heathrow directly to the City of London, Canary Wharf, the West End and to the heart of London’s Underground, Overground and National Rail system.

An example journey will be Bond Street to Heathrow Central in twenty-six minutes.

New trains on the Piccadilly Line are planned to enter service in 2023 and will offer more capacity and more pleasant journeys.

Currently, Piccadlly Circus to Heathrow Central takes fifty-two minutes and I would hope that this time is reduced to perhaps 40-45 minutes.

I think, these two upgrades will change the way many in Central, North East, East and South East London access the airport.

  • Trains will be more comfortable.
  • Trains will be frequent.
  • Crossrail will be completely step-free.
  • The Piccadilly Line will have more step-free stations.
  • The Crossrail trains will have masses of space.
  • Trains will take passengers to all the terminals

But Crossrail and the Piccxadilly Line upgrade, will do little for those in North West and South West London and those living to the West of the airport.

Workers

Workers at Heathrow, range from highly-paid pilots down to  lowly-paid cleaners, with a full spectrum in between.

Many though have a problem, in that they need to get to and from the airport at times, that are inconvenient for public transport.

A station guy at Staines said that getting between there and Heathrow for an early start or after a late finish is difficult.

The lower-paid workers also need good links to areas of lower-cost housing.

In an ideal world, Crossrail and Piccadilly Line services, should run on a twenty-four hour basis, with appropriate frequencies.

Supplies For The Airport And The Aircraft

I wonder what percentage of the supplies for Heathrow is brought in by diesel truck.

In the Heathrow of the Future, surely many supplies could be loaded onto smart trolleys and taken on electric freight trains to delivery points under the airport.

Air Cargo

Heathrow is an important air cargo terminal, but as with supplies, surely the cargo can be collected outside of the airport and delivered by electric shuttle trains.

Could Heathrow Go Diesel-Free?

I believe that if a well-designed rail-terminal was built under a new third runway, the extra rail capacity could enable, Heathrow to go substantially zero-carbon on the ground!

  • All vehicles bringing passengers to the Airport would have to be zero-carbon powered.
  • Hybrid vehicles would have to use battery power within a few miles of the Airport.
  • Air cargo and airport supplies would be shuttled into the Airport by electric train to the rail terminal under the third runway.
  • All vehicles serving the planes would be zero-carbon powered.
  • Even giant aircraft tugs for Boeing 747s and Airbus A380s can be battery-powered.
  • We are probably talking several years before a third runway would open! So why not?

It is disruptive innovation on a grand scale!

Airports built to these principles and there will be several before 2030, will have a massive marketing advantage.

The Best Bits Of The Various Actual And Proposed Rail Routes Into Heathrow

Crossrail

  • Connectivity to large parts of London and the East.
  • Connectivity to lower-cost housing areas in East and West London.
  • High capacity.
  • Frequent trains
  • Modern trains
  • All terminals served
  • Extra trains could be added.

The capability for 24 hour operation has hopefully been built in.

Heathrow Southern Railway

  • Connectivity to Waterloo, Clapham Junction, South and South West London
  • Extends Heathrow Express to Woking and Basingstoke
  • Adds a new route for commuters into Paddington.
  • Extends Crossrail from Heathrow to Staines.
  • It will be built alongside the M25 with a tunnel to Terminal Five.
  • All terminals served
  • Provides a freight route into the airport from the South West.
  • Privately funded.

Heathrow Southern Railway would also be able to serve any future rail terminal under a new third runway.

Piccadilly Line Upgrade

  • Connectivity to West and North London
  • Connectivity to lower-cost housing areas in West London
  • Frequent trains
  • All terminals served.
  • No new infrastructure

The Piccadilly Line probably needs 24 hour operation.

Western Rail Approach To Heathrow

  • Connectivity to Slough and Reading and further West with a change.
  • All terminals served.
  • Provides a freight route into the airport from the West.
  • Network Rail’s proposed scheme.
  • Government funded (?)

As with the Heathrow Southern Railway, Western Rail Approach To Heathrow would also be able to serve any future rail terminal under a new third runway.

West London Orbital Railway

  • Connectivity to North West London with a change at Old Oak Common.
  • Connectivity to low-cost hosting areas in West London.
  • Created as part of the Overground.
  • Eight trains per hour (tph) through Old Oak Common.
  • Connectivity for high-value passengers in affluent parts of North London.
  • Connectivity for important workers in less-affluent parts of North West London.
  • Probably, Transport for London funded.
  • No difficult construction.

The West London Orbital Railway should go ahead, because it connects so much of West London to Crossrail, Old Oak Common and High Speed Two.

Conclusions

I have seen railway stations and airports all over Europe.

Many airport stations are cramped, as they have been built as an afterthought.

But some like Schipol and Frankfurt have a comprehensive station, where you can get trains to a very long list of places without a change.

Heathrow Connectivity

Heathrow needs a very high level of connectivity, for passengers, workers and freight.

The two major schemes, that are left,  provide that.

  • Heathrow Southern Railway, which extends Heathrow Express to the South West and provides links to Waterloo and Greater South London.
  • Western Rail Approach To Heathrow does what it says in the name.

Both schemes would share the same Western access route to Terminal 5 station and this could be extended to also serve a new rail terminal under the proposed third runway.

What About The Workers?

Heathrow’s other big need is rail access for the increasing numbers of people, who work at the airport and live locally.

  • Heathrow Southern Railway links the airport to South West London.
  • Western Rail Approach To Heathrow links the airport to Reading and Slough.
  • Crossrail links the airport to Old Oak Common with its housing developments and rail connections with High Speed 2 and the London Overground.
  • West London Orbital Railway will bring more workers and passengers to Old Oak Common from all over North West and South West London.

Old Oak Common will be important for many working at the airport.

Pollution Solution

As the airport develops, Heathrow Southern Railway and Western Rail Approach To Heathrow could together make a substantial reduction in the pollution emitted by the airport.

Old Oak Common station

Old Oak Common station will become an important interchange for workers and passengers travelling to and from Heathrow.

  • It must be totally step-free.
  • Some of the long interchange walks on current plans should be augmented by travelators.
  • Crossrail is planning six tph between Old Oak Common and Heathrow. Is that enough?

Get Old Oak Common right and all those needing to go to and from Heathrow will benefit.

Heathrow And Gatwick

The connection between Heathrow and Gatwick Airports is tortuous at present.

  • It will get better, as Crossrail and Thameslink improve.
  • As the airports grow, with a third runway at Heathrow and a second one at Gatwick, how many people will want to travel quickly between the two airports, as increasingly, both airports will offer services to more destinations?
  • As a Londoner, I also believe that we will see more split flights, where passengers stopover in London for a night or two, when they are going halfway around the world.

Terminal London will be the best airport transfer terminal in the world.

Heathrow And High Speed One

I will be very surprised if many travellers need to go quickly between Heathrow and High Speed One.

For those that need to do it, using an extended Crossrail between Heathrow and Ebbsfleet will probably be good enough.

Heathrow And High Speed Two

For all sorts of reasons Heathrow needs good connectivity to High Speed Two.

With the elimination of direct access to the airport by High Speed Two, a short journey between Heathrow Airport and Old Oak Common stations will have to be acceptable.

 

 

April 28, 2019 Posted by | Transport | , , , , , , , , | Leave a comment

The Shape Of Things To Come

Yesterday, I needed to go between Moorgate and Tottenham Hale stations.

It was just before the evening Peak and I took the escalators down to the Northern City Line platforms, where a new Class 717 train was waiting.

The increased capacity meant I got a seat and I took the train three stops to Highbury & Islington station.

It was then just a walk through a very short tunnel to the Victoria Line and a train to Tottenham Hale.

It was so much more relaxed than squeezing into a crowded and very elderly Class 313 train.

After the timetable change in May, there will be eight trains per hour (tph), as there is now, but given the number of trains in the new fleet and signalling improvements in the pipeline, I feel that this frequency will be increased.

It should also be noted that in the Peak there are twelve tph, which in the future could be used all day.

But in the interim, trains with extra capacity will be very welcome.

From An Ugly Ducking To A Swan

These developments are either underway or planned for the next few years.

  • Improved signalling on the Northern City Line.
  • Full step-free interchange at Finsbury Park between Moorgate services and Thameslink, Piccadilly and Victoria Lines.
  • Higher frequencies on Thameslink and the Piccadilly Line through Finsbury Park
  • Full step-free access to the Northern City and Victoria Lines at Highbury & Islington station.
  • Full step-free access at Old Street station.
  • Hopefully, Essex Road station will be cleaned.
  • Crossrail will finally arrive at Moorgate station.

North London’s ugly ducking, which has caused passengers, British Rail and London Underground, so much trouble, will finally have turned into a swan.

I always wonder if the City of London;’s transport planners, wish that the Victorians had built the planned extension to a new Lothbury station, close to Bank.

What Will Be The Ultimate Frequency?

Currently the frequency between Alexandra Palace and Moorgate stations in the Peak is twelve tph.

Compare this with the following frequencies.

  • Crossrail will be initially 24 tph.
  • The East London Line is planned to go to 20 tph
  • The Piccadilly Line is currently at 24 tph between Arnos Grove and Acton Town stations in the Peak.
  • Thameslink will soon be at 24 tph
  • The Victoria Line is currently at 36 tph.

I don’t think it unreasonable that a frequency of at least sixteen and possibly twenty tph between Alexandra Palace and Moorgate stations is achievable.

  • Digital signalling and Automatic Train Control will be possible.
  • If Dear Old Vicky can turn 36 tph at Brixton and Walthamstow Central stations, with two platforms, then surely 20 tph at Moorgate is possible, once there is better access for passengers to the platforms.
  • Alexandra Palace to Moorgate is a double-track railway, that is almost exclusively used by Moorgate services.
  • 16-20 tph would make the cross-platform interchange with the Victoria Line at Highbury & Islington station very efficient.
  • There are two branches North of Alexandra Palace station. I’m sure each could handle 8-10 tph.
  • The Hertford Loop Branch has three terminal stations; Gordon Hill, Hertford North and Stevenage stations.
  • The East Coast Main Line has two terminal platforms  at Welwyn Garden City station.

I could see the following frequencies.

  • Moorgate and Gordon Hill – four tph
  • Moorgate and Hertford North – four tph
  • Moorgate and Stevenage – four tph
  • Moorgate and Welwyn Garden City – four to eight tph

It will be a very high-capacity Metro into Moorgate. There could be a need for a few more trains.

But with increased speed

Should The Northern City Line Be Shown On The Tube Map?

Increasingly, passengers will use the high-frequency Southern section of the Northern City Line between Alexandra Palace and Moorgate stations, as a new tube line.

So like Thameslink, the arguments will start as to whether this line should be on the Tube Map.

If Crossrail is to be shown, it is my view that nThameslink and the Northern City Line should be shown too!

April 2, 2019 Posted by | Transport | , , , , , , | 4 Comments

New Lifts At Finsbury Park Station

As I passed through Finsbury Park station, I took these pictures of the new lifts to the Piccadilly and Victoria Lines.

These lifts are particularly needed as there are no escalators between the Underground and the surface and you have to use spiral staircases.

This access is probably one of the worst design crimes on the Victoria Line, which was built on the cheap in the 1960s.

Notice that some of the signage is not complete and finding the lifts isn’t as easy, as it should be.

But then the installation is not fully finished.

February 3, 2019 Posted by | Transport | , , , , | Leave a comment

Should The Drain Get The First New Tubes For London?

Introducing new trains onto a rail route can be a difficult process, where all sorts of problems occur.

Testing And Introducing Class 710 Trains

Currently, London Overground are introducing Class 710 trains on the Gospel Oak to Barking Line.

As the trains are about eighteen months late, I think that there must have been problems.

I’ve never tested a train, but the modern train must require lots of systems to be tested and Aventras and other recent trains could best be described as computers-on-wheels.

So I must admit, I was a bit surprised, when I heard that first route to receive the new Class 710 trains was the Gospel Oak to Barking Line.

  • The line had only been recently electrified.
  • Both diesel and electric freight trains use the route.
  • Eight trains are needed to run a complete service.

As this will be the first time the trains are used, there would appear to be a lot of things that could go wrong.

The simplest route, where the new Class 710 trains are to be used is the Romford-Upminster Line.

  • It is 5.4 km long.
  • It is single-track
  • It has a 30 mph speed limit.
  • There is only three stations, each of which are a single platform.
  • The journey takes nine minutes.
  • The service operates every thirty minutes.
  • There is only one signal.
  • Only one train is needed for the service.

It must be one of the simplest electrified railways in the world.

My instincts would have been to put a single train on this line and constantly shuttle it backwards and forwards.

This was exactly how Bombardier tested the Class 379 BEMU train on the Mayflower Line.

  • Only the train is being tested.
  • Passenger systems can be tested.
  • Drivers can be trained.
  • Passengers can be asked their opinions.

If the train fails, there is a regular bus service between the two stations and service engineers are not far away at Ilford Depot.

There must be good reasons, why this approach hasn’t been used.

Perhaps, it’s just that London Overground are not going to use a Class 710 train on this route. There have been rumours of this, that I talked about in A Heritage Class 315 Train For The Romford-Upminster Line.

The New Tubes For London

London Underground are buying New Tubes For London from Siemens for four lines.

  • Piccadilly – 100 trains
  • Bakerloo – 40 trains
  • Central – 100 trains
  • Waterloo & City – 10 trains

First trains are to run on the Piccadilly Line in 2023.

I think that it will not be a simple case of replacing one fleet of old trains, with another fleet of new trains, as has been done in the past.

It was managed successfully in recent times on the Victoria Line, when 2009 Stock trains replaced 1967 Stock trains.

But Siemens design is more radical and may need track and platform work to be performed before the trains can be run.

My research in The Train-Platform Interface In London, showed that the interface seemed fairly consistent on the Piccadilly Line, so it may be easy to design trains to run the line efficiently with step-free access between train and platform.

But what about the section of the line, where the trains share track with the S8 Stock trains of the Metropolitan Line.

If the Piccadilly Line has to be closed to make it fit for the New Tubes for London, then it will be a major undertaking, even if it is done in sections.

It would be a high-risk undertaking.

A Test Line For New Tubes for London

I believe there would be advantages in creating a test line for the following purposes.

  • Test the engineering for track and platforms.
  • Test the train performance and reliability.
  • Test the Automated Train Control
  • Test the passenger systems.

One of the suburban sections could be used, but there could be problems.

The Waterloo & City Line As A Test Track

On the other hand the Waterloo & City Line could be an ideal test track.

  • It has only two stations.
  • It is step-free
  • It is only 2.4 km. long.
  • Journeys take four minutes.
  • It is integrated with a depot.

The only problem is that trains have to be moved in and out by the use of a crane.

Using the Waterloo & City Line as a test track does have other advantages.

Alternative Routes During Closure

If the line had to be closed for any period of time for track or platform work, then in 2023, there will be some excellent alternative routes.

  • Northern Line to Tottenham Court Road and then the Central Line to Bank.
  • Northern Line to Tottenham Court Road and then Crossrail to Moorgate.
  • Bakerloo Line to Embankment and then the Circle/District Lines to Monument.
  • Jubilee Line to London Bridge and then the Northern Line to Bank.
  • Southeastern From Waterloo East to London Bridge and then bus or walk.

There is also the direct 76 bus and possibly others.

It should be noted that from late 2021, the Northern Line platforms at Bank station will be much improved.

So, if the Waterloo & City Line was used to test the trains, this in itself would not present any problems during closure or unreliable service.

Improved Capacity For The Line

According to an article in the November 2017 Edition of Modern Railways, which is entitled Deep Tube Upgrade, new trains for the Waterloo & City Line will give a capacity increase of twenty-five percent.

This is much-needed.

Automatic Train Control Testing

Testing of any automatic control system must be very rigorous and the short double-track route of the Waterloo & City Line would be ideal for testing automatic control of the new trains.

Trains could test twenty-four hours per day and every day of the year and not annoy anybody.

Driver Training

It could a valuable resource in training new drivers and converting others to the new trains.

Ongoing Train Development

It is London Underground’s and Seimen’s objective to have the same trains on as many lines of the London Underground as possible.

Siemens might get it right first time, but each line has its own quirks and design features and having a short line in London, where the next version of the trains could be tested by the public could be an advantage.

Conclusion

I believe that introducing the New Tubes for London on the Waterloo & City Line before the other lines could give advantages in the testing and designing of the trains and for the passengers of this short route.

 

 

December 3, 2018 Posted by | Transport | , , , | Leave a comment

What Will Be The Operating Speed Of The New Tube for London?

Transport for London have said that the New Tube for London will definitely be deployed on the Piccadilly, Central and Bakerloo Lines.

These three lines have sections at one or both ends, where the lines run through the countryside and the stations are farther apart.

Only the 1992 Stock of the Central Line have their operating speed given in Wikipedia.. It is 62 mph, which is the same as the S Stock for the sub-surface lines.

The 2009 Stock of the Victoria Line, despite being similar to the S Stock have an operating speed of only 50 mph.

Because of the nature of the ends of the Piccadilly, Central and Bakerloo Lines, will 62 mph be the optimum operating speed for these trains.

I’ll look at the factors on these lines separately.

Piccadilly Line

The Piccadilly Line will be self-contained, after the sorting of the shared sections West Rayners Lane and between Ealing Broadway and Acton Town, that I discussed in Thoughts On The Power System For The New Tube for London.

I suspect the operating speed of the New Tubes for London on the Piccadilly Line, will be decided on what is best for that line.

Central Line

The Central Line is also self-contained and the best operating speed for the line will be chosen.

Bakerloo Line

The Bakerloo Line could be a problem, as currently Class 378 trains run on the same trcks. These have an operating speed of 75 mph.

These Class 378 trains will be replaced by Class 710 trains, which could have a faster performance.

Surely for optimum running, the trains should need similar performance.

The Benefit Of Automatic Train Control

On all the lines on which New Tubes for London will operate, there will be Automatic Train Control.

The operating speed will be set by the control system, whereas the maximum operating speed will be set by the trains design.

So I think we could see a maximum operating speed of 75 mph or even higher for the New Tube for London, so that it could run on faster lines and not slow the other faster trains.

More Speed Means More Powerful Trains And Improved Acceleration And braking

To go faster, you probably need more powerful trains, but the motors required would give better acceleration and braking, that would speed up services, by executing station stops in a shorter time.

Conclusion

I would expect from y Control Engineering training, that the New Tube for London could have a maximum operating speed in-line with the Class 710 train. So around 75-90 mph.

Could we even see an Underground train, that is capable of 100 mph?

It would only rarely, if ever, run at that speed on current plans, but it might enable Underground and National Rail services to share tracks in surprising places.

October 7, 2018 Posted by | Transport | , , , | 4 Comments

Thoughts On The Power System For The New Tube for London

Obviously, very little has been said about the power system of the New Tube for London.

London Underground Electrification

This description of Lundon Underground electrification comes from Electrification in the Wikipedia entry for London Underground Infrastructure.

The lines are electrified with a four-rail DC system: a conductor rail between the rails is energised at −210 V and a rail outside the running rails at +420 V, giving a potential difference of 630 V. On the sections of line shared with main line trains, such as the District line from East Putney to Wimbledon and Gunnersbury to Richmond, and the Bakerloo line north of Queen’s Park, the centre rail is bonded to the running rails, as the electrical return from National Rail trains is via the wheels. This was first used in the early 20th century, the isolated traction current return allowing a train’s position to be detected using DC track circuits, and reduced any earth leakage currents that could affect service pipes and telephone cables.

This picture shows a typical London Underground track on the Central Line at Bank station.

Note the suicide pit under the rails.

This layout is rather unusual and different to the third rail system used by National Rail services in London and the South East and on Merseyrail.

Battery Power

This article on Rail Engineer is entitled London Underground Deep Tube Upgrade.

This is an extract.

More speculatively, there might be a means to independently power a train to the next station, possibly using the auxiliary battery, in the event of traction power loss.

Batteries in the New Tube for London would have other applications.

  • Handling regenerative braking.
  • Moving trains in sidings and depots with no electrification.

It should be born in mind, that battery capacity for a given weight of battery will increase before the first New Tube for London runs on the Piccadilly line around 2023.

Conversion To A Conventional Third-Rail System

Given, that space in the deep tunnels is limited, I wonder if removing the third rail in the middle and going to a third-rail 630 V DC system will give more space under the train, that could be used for equipment and a lower floor.

The following lines could eventually be converted to the New Tube for London.

So could the shared running be eliminated to make conversion easier.

The Bakerloo Line North of Queens Park Station

The New Tube for London must be able to share the track with the Class 710 trains working the Watford DC Line.

There would be no problem with traction, as both types of trains could use conventional third-rail track.

But there would be a problem with platform height.

Between Rayners Lane and Uxbridge Stations

In Can Between Rayners Lane And Uxbridge Stations Be Step-Free?, I investigated the line between these two stations, including these possibilities.

  •  Unattended Train Operation (UTO) on the Piccadilly Line, which may mean platform edge doors.
  • Terminating The Piccadilly Line At Rayners Lane Station
  • Terminating The Metropolitan Line At Rayners Lane Station
  • A Piccadilly Line Service Be Run Between Uxbridge and Ealing Broadway Stations
  • Extending The Central Line To Uxbridge

I came to this conclusion.

There are a lot of possible improvements that can be done to the train service to Uxbridge.

That is probably a bit of a cop-out, but then there are a lot of possibilities, some of which eliminate the Piccadilly and Metropolitan Lines sharing the track to Uxbridge.

Between Acton Town And Ealing Broadway Stations

This map from carto.metro.free.fr shows the lines Between Acton Town and Ealing Broadway stations.

Note how the Piccadilly and District Lines share tracks from Ealing Common station, which then split with District Line trains going to Ealing Broadway station and Piccadilly Line trains going to Rayners Lane and Uxbridge stations.

Transport for London are suggesting the following.

  • Ealing Broadway is served by the Piccadilly Line, rather than the District Line.
  • District Line trains would terminate at Richmond and Wimbledon stations instead of Ealing Broadway.
  • East of Acton Town, Piccadilly Line trains would call at Turnham Green, Ravenscroft Park and Hammersmith
  • District Line trains would call at a relocated Chiswick Park, Turnham Green, Stamford Brook, , Ravenscroft Park and Hammersmith.
  • East of Hammersmith, both District and Piccadilly Line routes would be unchanged.

Passengers needing to travel between Ealing Broadway and stations between Victoria and Whitechapel, would change at Turnham Geen, Ravenscroft Park or Hammersmith, by walking across the platform.

If this change is implemented, there will be no shared running between the Piccadilly and District Lines.

National Rail Shares Tracks With The Metropolitan And District Lines

There is some shared running on the Metropolitan and District Lines but that would be unaffected.

Conclusions On Conversion To A Conventional Third-Rail System

It looks to me, that it would be possible to convert the deep-level Underground Lines to conventional third-rail, by eliminating sharing with other lines.

But would such a radical change to the electrification of London’s deep-level Underground lines be feasible and economic?

Conversion From Four Rails To Three

I suspect that when the New Tube for London is introduced on a line, the track will be renewed or at the least given a good refurbishment.

Some years ago, I obtained a database of all the faults on the London Underground for a year. Very few of the faults were down to track faults and the only problems in tunnels seemed to be water ingress.

So I think we can assume, that the track foundations are probably in good condition. If they aren’t I suspect London Underground know all about the problems.

My project management knowledge leads me to believe that a well-planned series of track closures should be possible  to convert the track.

Safety

At all stations, the rail in the centre of the track would not be there anymore and the only electrified rail could be placed on the far side from the platform in deep-level stations.

This is another picture from Bank station.

Note.

  1. The +420 VDC power rail sitting on insulators close to the wall
  2. The -210 VDC power rail sitting on insulators on posts in the suicide pit.
  3. How the two running rails neatly fit on ledges on either side of the suicide pit.

Imagine how it would look with the negative power rail removed.

The single rail could also be shielded, by perhaps an insulating board on both sides of the rail.

This picture shows an insulated third rail at Oxted station. The yellow insulator is wood, that has been painted.

I would extrude the insulator using recycled plastic. After all polythene’s first major use was as an insulator in radar during World War II.

I believe that a three-rail track could be designed, that would surely be much safer than the current track, should anybody fall or be pushed off the platform.

There is also the possibility of using battery power in some or even all stations. Power would only be supplied to the trains between stations, where batteries would be charged.

The third rail would stop perhaps forty metres at either side of a station and the gaps would be bridged by battery power.

It might be possible to make stations, with no electrified rails visible or accessible.

Eliminating The Gap

I would imagine that the design of the New Tube for London will make sure that the doors are aligned with the platform, as these doors on a Class 378 train are with the platform on the London Overground.

I would imagine, that  by making certain that the running rails are correctly adjusted, then step-free access between train and platform can be achieved.

I’ve certainly seen passengers in wheel-chairs push themselves in and out of trains at Dalston Junction station.

Electrolytic Corrosion

Mark said this in a comment.

There is a very important reason why the tube uses two power rails. It was quickly discovered that using a ground return on a DC circuit lead to the return current actually coming back via te cast iron tunnel lining rings and electrolysis and electrolytic corrosion of the lining.

Transport for London’s engineers would be very aware of any problems, and I suspect that they have a viable solution.

This article on Rail Engineer is entitled New London Underground Slab Track Cast In-Situ.

It describes how they are using slab track cast in the tunnel to fit problems in short tunnels. They also expect the solution to last a hundred years.

Such a solution would surely work in the cast-iron deep-level tunnels to allow new track to be installed in whatever format was desired.

There Is One Major Problem

The New Tube for London won’t be able to run on the existing track and the current 1973 Stock won’t be able to run on the future track.

So London Underground sensible policy of phasing in the new trains alongside the old ones, as was done on the Victoria Line would not be possible.

The first line to be equipped with New Tube for London trains will be the Piccadilly Line, which has the following characteristics.

  • There are two depots; Cockfosters and Northfields, which are conveniently at each end of the line.
  • There are sidings at Arnos Grove, South Harrow and Uxbridge.
  • Trains can be turned back to the West at Acton Town, Arnos Grove and Wood Green
  • Trains can be turned back to the North at Acton Town, Barons Court, Green Park and Rayner’s Lane.
  • There are crossovers at Hatton Cross, Hounslow Central and Kings Cross St. Pancras.

There are many more sidings, turnbacks and crossovers than most other lines.

These may enable a phased conversion of the line to the new track design, signalling and trains.

Conclusion

I believe it is feasible to convert London’s deep-level Underground lines to a conventional third-rail system, as used in the rest of London, the South East and Merseyrail.

This would give these advantages.

Running On Coventional Third-Rail Tracks

New Tube for London trains could run on the following lines and share with trains like Aventras, Desiro Cities, Electrostars and Networkers equipped for third-rail operation.

Routes where this might be useful include.

  1. Extending the Bakerloo Line along the Watford DC Line, to the North of Queens Park station.
  2. Extending  the Bakerloo Line Extension to the South of Lewisham station to Beckenham Junction, Bromley North and Hayes stations.

Route 2 would release paths into an overcrowded London Bridge station.

Look at this map from carto.metro.free.fr, which shows the new terminus of the Northern Line at Battersea Power Station station.

The under-construction Northern Line Extension is shown dotted.

Could Northern Line services come to the surface, join the surface lines and run to Clapham Junction station and possibly beyond?

Creating More Space And A Level Floor In The New Trains

Removing the centre rail will give more space in the limited tunnels of the deep-level Underground lines and must make it easier to squeeze in all the equipment that has been specified for the new trains.

Increasing Safety

It is my view, that the suicide pit under the train will be wider and will not be guarded by an electric rail.

The main power supply will be right out of the way in stations and could even be eliminated from stations by the use of batteries.

 

 

 

 

October 6, 2018 Posted by | Transport | , , | 7 Comments

Capacity Of Cross London Rail Routes

I shall start by looking at the current and future capacity of various rail routes across London.

Bakerloo

The Bakerloo Line has a frequency of twenty trains per hour (tph) between Queen’s Park and Elephant & Castle stations.

The current 1972 Stock trains have a capacity of 700 passengers.

This gives a capacity a 14,000 passengers per hour (pph) in each direction.

In the Wikipedia entry for the New Tube for London, this is said.

Bakerloo line capacity could be increased by 25% with 27 trains per hour at peak times by 2033.

This gives a future capacity of 17,500 pph in each direction.

Central

The Central Line has a frequency of thirty-five tph between White City and Leytonstone stations.

The current 1992 Stock trains have a capacity of 930 passengers.

This gives a capacity a 32,550 pph in each direction.

In the Wikipedia entry for the New Tube for London, this is said.

Central line capacity increased by 25% with 33 trains per hour at peak times by 2030.

This gives a future capacity of 40,687 pph in each direction.

Crossrail

Crossrail is planned at present to have twenty-four tph between Paddington and Whitechapel stations.

Each of Crossrail’s Class 345 trains can hold 1,500 passengers.

This gives a capacity a 36,000 pph in each direction.

It has been said in several places that Crossrail has a future frequency of thirty tph.

If this could be achieved this would increase capacity to 45,000 pph in each direction.

District

The District Line has a combined frequency with the Circle Line of  twenty-four tph between Gloucester Road and Tower Hill stations.

The current S7 Stock trains have a capacity of 865 passengers.

This gives a combined capacity a 20,760 pph in each direction.

The Wikipedia entry for the District Line talks about a future frequency of thirty-two tph.

This could increase the future capacity to 27,680 pph in each direction.

East London

The East London Line has a frequency of sixteen tph between Dalston Junction and Surrey Quays stations.

The current Class 378 trains have a capacity of 840 passengers.

This gives a capacity of 13,440 pph in each direction.

London Overground are planning to increase the frequency to twenty tph in the next couple of years.

This would give an increased capacity if 16,800 pph in each direction.

Gospel Oak To Barking

The Gospel Oak To Barking Line has a frequency of four tph across North London,

The current Class 172 trains have a capacity of 120 seats, with perhaps a total capacity of 300.

This would give a capacity of 1,200 pph in each direction.

The new Class 710 trains have a capacity around 700, according to various reports.

This would give a future capacity if 2,800 pph in each direction.

Hammersmith & City

The Hammersmith & City Line has a combined frequency with the Circle Line of twelve tph between Paddington and Liverpool Street stations.

The current S7 Stock trains have a capacity of 865.

This gives a combined capacity of 10,380 pph in each direction.

Jubilee

The Jubilee Line has a frequency of thirty tph between North Greenwich and Willesden Green stations.

The current 1996 Stock trains have a capacity of 875 passengers.

This gives a capacity of 26,250 pph in each direction.

With Siemens new trains, I suspect that this value could be increased by perhaps fifteen percent to 30,187 pph in each direction.

Metropolitan

The Metropolitan Line has an Off Peak frequency of sixteen tph between Baker Street and Liverpool Street stations.

The current S8 Stock trains have a capacity of 1003.

This gives a combined capacity a 16.048 pph in each direction.

With the Metropolitan Line Upgrade, we can probably see some more capacity.

A not unreasonable twenty percent would raise the future capacity to 19,257 pph in each direction.

Northern

In the Peak both branches of the Northern Line have a frequency of twenty-four tph between Camden Town and Kennington stations.

This is reduced to twenty tph in the Off Peak.

With the addition of the Extension to Battersea, these figures are unlikely to get lower.

The current 1195 Stock trains have a capacity of 662 passengers.

This gives a capacity of 31,776 pph in each direction.

With Siemens new trains, I suspect that this value could be increased by perhaps fifteen percent to 36,542 pph in each direction.

North London

The North London Line has a frequency of eight tph between Willesden Junction and Stratford stations.

The current Class 378 trains have a capacity of 840 passengers.

This gives a capacity a 6,720 pph in each direction.

London Overground are possibly planning to increase the frequency to twelve tph in the next couple of years.

This would give an increased capacity if 10,080 pph in each direction.

Piccadilly

As we don’t know the capacity of the new Siemens trains, this is a best estimate, for when they are in service around 2023-2025.

Currently, the Piccadilly Line is running at a frequency of twenty-four tph between Barons Court and Arnos Grove stations.

The current 1973 Stock trains, each have a capacity of 684 passengers.

This gives a current capacity of 15,416 pph in each direction.

In the Wikipedia entry for the New Tube for London, this is said.

Piccadilly line capacity could be increased by 60% with 33 trains per hour at peak times by 2025.

This gives a 2025 capacity of 24,666 pph in each direction.

Dividing  the 24,666 by 33 gives a train capacity of 750 passengers for a New Tube for London.

Thameslink

Thameslink will have a frequency of twenty-four tph between St. Pancras and Blackfriars stations.

Half of these will be twelve-car Class 700 trains with a capacity of 1754 and the other half will be eight-car trains with a capacity of 1146.

This gives a capacity of 34,800 pph in each direction.

It has been stated that Thameslink will be able to handle thirty tph in the future, which would raise the capacity to 43,500 pph in each direction.

Victoria

The Victoria Line is currently running at a frequency of thirty-six tph.

The current 2009 Stock trains, each have a capacity of 876 passengers.

This gives a capacity of 31,536 pph in each direction.

I think it is reasonable to assume that the Victoria Line is at capacity.

But I wouldn’t be surprised, that with station improvements, which would include a double-ended Walthamstow Central station, engineers on Dear Old Vicky managed to squeeze forty tph out of the old girl.

This would give a capacity of 35,040 pph in each direction.

I also wouldn’t rule out replacing the current trains with the New Tube for London, if the new trains have proved an outstanding success on all the other lines. But that probably wouldn’t be to well into the 2030s.

Current And Future Summary And Total Capacity

The current figures in passengers per hour can be summarised as follows.

  • Bakerloo – 14,000
  • Central – 32,550
  • Crossrail – 36,000
  • District – 20,760
  • East London – 13,440
  • Gospel Oak To Barking – 1,200
  • Hammersmith & City – 10,380
  • Jubilee – 26,250
  • Metropolitan – 16,048
  • Northern – 31,776
  • North London – 6,720
  • Piccadilly – 15,416
  • Thameslink – 34,800
  • Victoria – 31,536

This gives a total current capacity of 290,876

Reasonable projections for future figures can be summarised as follows.

  • Bakerloo – 17,500 (25% Increase) – New Tube for London/New Signalling
  • Central – 40,687 (25% Increase) – New Tube for London/New Signalling
  • Crossrail – 45,000 (25% Increase) – 30 tph from 24 tph
  • District – 27,680 (33% Increase) – New Signalling
  • East London – 16,800 (25% Increase) – 20 tph from 16 tph
  • Gospel Oak To Barking – 2,800 (133% Increase) – New larger trains
  • Hammersmith & City – 10,380
  • Jubilee – 30,187 (15% Increase) – New Tube for London
  • Metropolitan – 19257 (20% Increase) – New Signalling
  • Northern – 36,542 (15% Increase) – New Tube for London
  • North London – 10,080 (50% Increase)
  • Piccadilly – 24666 (60% Increase) – New Tube for London/New Signalling
  • Thameslink – 43,500(25% Increase) – 30 tph from 24 tph
  • Victoria – 31,536

This gives a total future capacity of 356615

Or a capacity increase of around twenty-three percent.

What Do These Figures Show?

My figures are very much rough estimates, based on what is proposed to happen.

New Tube for London

Five of the improvements in capacity require the replacement of the current trains with the New Tube for London. Three of these replacements will need new signalling and only the Piccadilly Line trains have actually been given the go-ahead.

If these train replacements and signalling are done sequentially, they would show these overall capacity improvements.

  • Piccadilly – 3.2%
  • Central – 2.6%
  • Bakerloo – 1.1%
  • Jubilee – 1.3%
  • Northern – 1.5%

Overall, these five projects will increase capacity by 10.2%

Some of these figures may appear small, compared to the Piccadilly and Central, but then with the exception of the Bakerloo, the other lines already have Automatic Train Control and high-frequency services.

The great thing about the effects of the New Tube for London on capacity, is that it is a rolling program and as each line is converted, more capacity will continue to be added, benefiting many parts of London.

Digital Signalling

Increasingly, lines in London are digitally-signalled with a degree of Automatic Train Control.

In a few years time, these lines will be controlled this way in Central London.

  • Central
  • Circle
  • Crossrail
  • District
  • Hamersmith & City
  • Jubilee
  • Metropolitan
  • Northern
  • Piccadilly
  • Thameslink
  • Victoria

All these lines are or will be carriers of high numbers of passengers.

In A North London Line With Digital Signalling, I looked at the benefits of installing digital signalling on the North London Line. This was my conclusion.

It looks to me, that they’ll come a time, when digital signalling to squeeze the required number of trains along the North London Line.

Digital signalling will have to be applied to all the other lines in my list to make the most of the train lines we have in London.

Bakerloo

These lines will be given new signalling

  • Bakerloo – 17,500 (25% Increase)
  • Central – 40,687 (25% Increase)
  • District – 27,680 (33% Increase)
  • Hammersmith & City – 10,380
  • Metropolitan – 19257 (20% Increase)
  • Piccadilly – 24666 (60% Increase)

Of the deep level Underground lines, the Bakerloo Line is well below the capacity in passengers per hour (pph) of the other lines, through Central London.

The easiest way to increase the capacity would be to increase the frequency of the trains, by the application of digital signalling.

Earlier in the section on the Piccadilly Line, I calculated the capacity of each New Tube for London on that line as 750.

So if the Bakerloo Line could handle the thirty-six tph currently running on the Victoria Line, this would give a capacity of 23,333 pph in each direction.

Like the Victoria Line, the Bakerloo is a simple double-track without junctions through Central London.

At the Southern end the line terminates in the two platforms at Elephant & Castle station. If Brixton and Walthamstow Central stations can handle thirty-six tph, then surely with modern trains and digital signalling, this number of trains can be handled at Elephant & Castle station.

But at Queen’s Park station, it’s more difficult.

This map from carto.metro.free.fr shows the track layou at Queens Park station.

Note.

  1. The Watford DC Line of the Overground is shown in orange and runs through Kilburn High Road and Queens Park stations.
  2. The Bakerloo Line is shown in brown and runs through Kilburn Park and Queens Park stations.
  3. There are reversing sidings to the West of Queens Park station for the Bakerloo Line.

The following services go through or terminate at Queens Park station.

  • Three tph between Euston and Watford Junction on the London Overground.
  • Six tph between Harrow & Wealdstone and Elephant & Castle on the Bakerloo Line.
  • Three tph between Stonebridge Park and Elephant & Castle on the Bakerloo Line.
  • Eleven tph between qQueens Park and Elephant & Castle on the Bakerloo Line.

It is also likely that the Overground service will go to four tph.

So this means that services will be as follows.

  • Four tph on the Watford DC Line run through Kilburn High Road station.
  • Twenty tph on the Bakerloo Line run through Kilburn Park station.
  • Nine tph on the Bakerloo Line run through Queens Park station.
  • Four tph on the Watford DC Line run through Queens Park station.
  • Eleven tph on the Bakerloo Line terminate at Queens Park station.

Thirteen tph will continue to various destinations towards Watford.

So how many trains could the double-track line between Queens Park and Wartford Junction stations handle?

Consider.

  • All services on the line are london Overground or London Underground.
  • There are no junctions, where services divide and join.
  • There is a turnback facility at Harrow & Wealdstone station, that can handle six tph.
  • The Overground trains are being replaced with Class 710 trains, which must be able to be made compatible with digital signalling.
  • Watford Junction station has four platforms connected to the Watford DC Line.
  • Good design should be able to make the stations step-free for both Class 710 trains and New Tube for London.
  • The Watford DC Line service, always seems to terminate in platform 9 at Euston.
  • London Underground have run thirty-six tph on the Victoria Line for about a year now.

I suspect that if the trains are digitally signalled, with a degree of Automatic Train Control, that there could be as many as thirty-six tph between Queens Park and Watford Junction stations.

I also think it is significant that the New Tube for London, specifies that the Bakerloo Line will run at twenty-seven tph. Why not more, if the theoretical capacity North of Queens Park is thirty-six tph?

But a single platform at Euston can probably handle six tph, so add 27 and 6 and you get 33 tph, which is the proposed core frequency of the Piccadilly Line.

Suppose too, that all Bakerloo services ran all the way to Watford Junction.

  • This would simplify operation at Queens Park, Stonebridge Park and Harrow & Waldstone.
  • Digital signalling would easily handle the frequency.
  • The platform arrangement at Queens Park would be unchanged, with Euston services on the outside and Bakerloo services in the middle.

Suppose too, that the Watford DC Line service were to be run by New Tube for London trains.

  • All platform heights could be the same.
  • All services would be step-free between train and platform.
  • Digital signalling could easily handle 33 tph along the route.

This last section has very much been speculation on my part, but it shows how it may be possible to create a service on the Bakerloo Line with the following characteristics.

  • Twenty-seven tph between Watford Junction and Elephant & Castle stations.
  • Six tph between Watford Junction and Euston stations.
  • All stations would be step-free between platform and train.
  • All trains would be identical New Tube for London trains.
  • All trains would run under Automatic Train Control, as does the Victoria Line.

Note, that I have said nothing about the Bakerloo Extension to Lewisham.

In my view, that extension does what it says on the tin and creates a new twenty-seven tph service between Elephant & Castle and Lewisham, which brings new services to an area of South-East London, where they are much needed.

Effectively, the Bakerloo Line could become two twenty-seven tph lines, that happen to connect back-to-back at Elephant & Castle station to enable cross-London journeys.

If we look at the Victoria Line, where the frequency has increased over the last few years by the addition of various improvements, I would not be surprised to see the frequency of twenty-seven tph increased.

After all London Underground’s engineers have been squeezing Dear Old Vicky for half a century, so they must know more tricks, than Paul Daniels knew at the peak of his success.

Crossrail

Taking the figures in the current table, Crossrail will add 36,000 pph in both directions across London, to a current capacity of 254,876.

This is a increase of fourteen percent on the current total capacity.

Increasing the frequency from twenty-four to thirty tph, adds another 9,000 pph in each direction, which is an increase of seventeen percent on the current total capacity.

It is very likely, that Crossrail has been designed, so that the train length can be changed as required.

The initial trains have been supplied as seven-car trains and when the line opens nine-car trains will be used.

I have read somewhere that the trains could be extended to ten cars, but eleven might be a bit difficult.

So what would be the effect on capacity of ten-car trains.

I will assume each ten-car train has a capacity of 1500 *10 / 9 = 1667.

This means that Crossrail capacity is increased as follows with ten-car trains.

  • 24 tph gives a capacity of 40,000 pph in each direction. Or sixteen percent on the total current capacity!
  • 30 tph gives a capacity of 50,000 pph in each direction. Or twenty percent on the total current capacity!

It looks like Crossrail might have been built to be expanded.

East London Line

It is my view that the East London Line will eventually be digitally signalled and there could be an increase in frequency from the proposed twenty tph.

It has been stated in the past, that the East London Line will eventually have a service based on six-car trains, running at a frequency of twenty-four tph.

Six-car trains could be a problem, as some of the stations like Canada Water, Shadwell, Wapping and Rotherhithe are a bit short for five-car trains and use selective door opening.

The hopefully high-capacity connection to Crossrail at Whitechapel station will surely drive more passengers to use the East London Line.

So increasing the frequency to twenty-four tph using digital signalling would be an option to increase the capacity.

There are four separate services on the East London Line.

  • Dalston Junction and New Cross
  • Dalston Junction and Clapham Junction
  • Highbury & Islington and Crystal Palace
  • Highbury & Islington and West Croydon

Each currently has a srvice of four tph, but it is planned that six tph will run to Crystal Palace and Clapham Junction before 2020.

Note that all services terminate in a dedicated platform, that is not shared with other services.

With modern signalling and good driving, these platforms should be able to handle six tph.

If all services went to six tph, that would mean twenty-four tph, through the core of the East London Line.

This would mean that the capacity of the line would be 20,160 pph in each direction, which would be a fifty percent increase on current capacity.

There may even be space for more trains through the core, as thirty tph is certainly possible with digital signalling. But where would the trains terminate?

Extra tunnel-capable Class 378 trains to run the extra services shouldn’t be a problem, as new Class 710 trains, will displace the older units from the Watford DC and the North London Lines.

North London Line

It is my view that the North London Line will eventually be digitally signalled to allow a more intensive passenger service than eight tph, amongst all the freight trains.

I have said that twelve tph between Willesden Junction and Stratford will be possible, within a few years.

But this could be the limit for the following reasons.

  • Terminating twelve tph in the two platforms at Stratford is probably possible but difficult.
  • Clapham Junction with one platform can probably handle six tph but no more.

Only Richmond has enough capacity for extra trains.

 

Conclusion

It looks to me that digital signalling and well-designed new trains can improve the capacity across London. Or Liverpool, Newcastle or Berlin to name just three major cities.

 

 

 

October 4, 2018 Posted by | Transport | , , , , , , , , | Leave a comment