The Anonymous Widower

The Ultimate Capacity Of The Moorgate Line

The Moorgate Line is an important commuter line to and from its terminus at Moorgate station within easy walking distance of the City of London.

I use the line regularly to travel between my house and Moorgate station for breakfast at Leon, followed by shopping in Marks & Spencer on Finsbury Pavement.

  • I catch a 38 or 56 bus from close to my house to Essex Road station.
  • I then take the Northern City Line two stops to Moorgate station.

After my breakfast and shopping, I generally get a bus home, as it means less road crossings to get to my house.

A Useful Line That Needs Improvement

It is a useful and well-used line, that needs improvement in various areas, some of which is already being done or is either in planning or fully planned.

The New Class 717 Trains

The new Class 717 trains are now all running up and down without too many problems.

The trains have been designed for the route, so hopefully they have the following features.

  • Fast and automatic voltage changeover between 25 KVAC overhead and 750 VDC third-rail at Drayton Park station.
  • Ready for ERTMS signalling.
  • 100 mph running, so they don’t get in the way of Thameslink trains on the East Coast Main Line (ECML).
  • Fast acceleration and regenerative braking to batteries for fast station stops and train recovery, when power fails.
  • Optimisation for fast entry and exit to the trains.

I am afraid that they don’t fully meet the last three points, but they should!

It will be interesting to compare these trains, with Statdler’s new Class 777 trains for Merseyrail, which are also replacing similar BR units.

I believe that regenerative braking to batteries is important for trains in tunnels, and as far as I can determine, only Bombardier’s Class 345 trains for Crossrail have it fitted.

  • It reduces the power running in the overhead cables or third-rail in the tunnels, which generates less heat.
  • Conventional braking can be avoided in tunnels.
  • In case of power failure, the train can be moved to the next station for passenger evacuation.

If trains, tunnels and power supply are designed as a complete system, then surely there must be cost savings.

It is also probably true to say about these trains, that if the operator needed some more trains, then Siemens would probably oblige.

Upgrading The Route

The complete route consists of three separate parts.

The big upgrade planned for the East Coast Main Line is to install ERTMS digital signalling between Doncaster and Kings Cross.

Network Rail are doing their first digital signalling design in a darkened room with no communication to the real world, but I believe if the project was designed by experienced engineers, the following will happen.

  • Any train that might use the East Coast Main Line will be fitted with ERTMS signalling.
  • This ERTMS roll-out must include all Class 717 trains, as these can use the East Coast Main Loop to Welwyn Garden City and at Stevenage station.
  • As the Hertford Loop Line is used as a diversion for the East Coast Main Line, it would be logical to install ERTMS signalling on this route.
  • Installing ERTMS  signalling into Moorgate station would surely be beneficial and would surely be needed to get the best of ERTMS  on the East Coast Main Line.

The outcome should be that the whole Moorgate Line will become a fully digitally signalled route.

This should increase train frequency and capacity on all the digitally signalled routes.

  • The fast lines of the East Coast Main Line will become a 140 mph race track.
  • The slow lines of the East Coast Main Line will allow extra services.
  • If coupled with track improvements, extra capacity on the Hertford Loop Line could be used to allow services to by-pass the bottleneck of the Digswell Viaduct with its limited pair of tracks.
  • The Northern and City Line could take extra trains to and from Moorgate.

There could be reorganisation of some services.

  • Kings Cross and Cambridge/Ely/Kings Lynn services would be run by 140 mph trains, so they could use the fast lines on the East Coast Main Line. I feel these services could be extended to Norwich, but that’s another matter. What would Alan Partridge think of High Speed Norwich?
  • Thameslink services serving Peterborough would still use the East Coast Main Line, so they could call at Welwyn North and Knebworth stations, but why not divert the four trains per hour (tph) that serve Cambridge onto the Hertford Loop Line at Stevenage, to ease pressure over the Digswell Viaduct.

Consider.

  • An upgraded Hertford Loop Line with full digital signalling could be able to handle as many as the twenty-four tph of Thameslink and Crossrail,
  • The grade-separated junction with the East Coast Main Line is being improved.
  • There are only infrequent freight trains on the Hertford Loop Line.
  • Various  platform upgrades at Hertford East and Gordon Hill could allow passing and more turnbacks.

My scheduling experience says that with a well-programmed computer calling the shots, that at least twenty tph along the Hertford Loop Line would be a serious possibility.

Improvements At Stevenage

The Stevenage improvements are very comprehensive and are designed so that however many trains run through the Hertford Loop, they can all stop in the station, if required.

Improvements At Alexandra Palace

If you are travelling North from Moorgate and find yourself on an East Coast Main Line service, when you need a Hertford Loop One, there is a cross-platform interchange at Alexandra Palace station, where the two routes are on either side of the platform.

It is convenient, but the platform needs better facilities, like a decent waiting room, better information screens and possibly a coffee stall and toilets.

Going South, there are two separate platforms, but this doesn’t matter, as there is no need to change.

Although surely, if all trains left from the same island, it would be easier for passengers.

The station would be improved with a properly-designed step-free bridge and information screens.

Passengers needing other than Moorgate as a final destination must change at Finsbury Park for Thameslink or the Piccadilly Line

The Knitting At Finsbury Park

This map from carto.metro.free.fr shows the tangle of lines at Finsbury Park station.

Note that the blue lines are the Victoria and Piccadilly Lines.

Improvements in the last few years have unlocked some of the station’s potential, but there is still plenty of space on the railway land to add extra tracks and possibly reinstate two more platforms.

If there are any train capacity problems, I believe that they can be solved.

The main passenger interchanges at Finsbury Park station are.

  • An up-and-down interchange with the Piccadilly Line
  • A cross platform interchange with Thameslink

Lifts have been added recently.

Improvements At Drayton Park Station

Drayton Park station is one of those stations, that should be given to developers with a blessing and a very detailed set of objectives and timescales  enthrined in a watertight contract.

  • The station sits very close to the Emirates Stadium.
  • The new trains have increased passenger capacity through the station.
  • It could handle much-more match day traffic.
  • Large amounts of housing could be built on top.

If done well, it could provide a lot of housing and take the pressures off the other stations in the area on match days.

Improvements At Highbury & Islington Station

This map from carto.metro.free.fr shows the lines at Highbury & Islington station.

The track layout is basically sound.

The cross-platform interface between the Victoria and Moorgate Line is superb and only needs a good team of builders and lighting specialists to give it a modern finish to make it even better.

The Overground will get better too, as service frequencies increase by up to fifty percent.

The big problem at Highbury & Islington station is that access to the deep level platforms is not fit for purpose.

It is an absolute disgrace that The Mayor and Transport for London have put forward no plan to solve the problem of access to the deep level platforms.

The solution would probably involve opening up the disused station entrance on the on the side of Holloway Road and sinking an escalator and lift shaft to the four platforms. As at Drayton Park station, I believe with the right contract, it could be handed to a developer.

At least Crossrail, when it opens might give a bit of relief in the Peak. Many passengers might avoid Highbury & Islington station altogether by changing between the Overground and Crossrail at Whitechapel.

Like water passengers tend to flow through the widest channels and find their own level.

Improvements At Essex Road Station

Essex Road station is a disgusting station, with all the charm of a Victorian slum.

As with Drayton Park station, it should be given to developers with a blessing and a very detailed set of objectives and timescales  enthrined in a watertight contract.

Improvements At Old Street Station

The access to the existing Old Street station is being improved, but it seems to be taking forever.

I do hope, there is a realistic plan to create a flagship station for Silicon Roundabout.

Improvements At Moorgate Station

This station is being fully upgraded for Crossrail.

Eventually, there will be step-free access between the following lines.

  • Central Line
  • Circle Line
  • Crossrail
  • Hammersmith & City Line
  • Northern Line

In addition all the National Rail  lines out of Liverpool Street will be step and weather-free from all the other lines.

This can only increase the number of passengers using the Moorgate Line.

The Ultimate Frequency

I said earlier that the complete route consists of three separate parts.

  • The Northern City Line between Moorgate and Finsbury Park stations.
  • The slow lines of the East Coast Main Line to the South of Welwyn Garden City station.
  • The Hertford Loop Line between Stevenage and Alexandra Palace stations

These are my thoughts on the capacity of each section.

Frequency Of The Northern City Line

I know Walthamstow Central station on the Victoria Line well and have observed the following.

  • Thirty-six tph come and go for most of the day.
  • From the time the brakes are applied after a train arrives until the time they are release when the train leaves is about two and a half minutes.
  • Drivers use a procedure called stepping-up to speed the turnround. The driver leaves the arrived train and a new driver gets in at the other end, to drive it out.
  • There is a lot of passenger congestion in the Peak, due to bad passenger access.

Surely, if Dear Old Vicky can handle thirty-six tph with the following.

  • Two platforms,
  • Modern trains
  • Modern signalling
  • Well-trained staff
  • Not the best passenger access with just two escalators.

Then the new Class 717 trains at Moorgate with the best passenger access can handle a higher frequency than they do now!

I suspect that around twenty tph can be achieved fairly easily, but that in future , a higher frequency will be achieved.

Frequency Of The Slow Lines Of The East Coast Main Line

London has several commuter lines with frequencies of over 10 tph.

  • Foremost, are Crossrail and Thameslink, which are both planned to run at 24 tph
  • The East London Line is also planned to increase from 16 tph to 20 tph.
  • The North London Line is planned to be increased from its current eight tph
  • Waterloo and Wimbledon is upwards of 8 tph.

In addition most London Underground lines have frequencies in exccess of 16 tph.

The slow lines of the East Coast Main Line to be a railway,  in a few years time with the following characteristics between Finbsbury Park and Welwyn Garden City.

  • At least one track in each direction.
  • An operating speed of over 60 mph
  • ERTMS signalling, which will be fitted to all trains on the lines.

I can’t see any reason, why the lines couldn’t be able to handle up to twenty tph in both directions, based on the experience of other lines in London, that have been operating for over a decade.

But strand on the bridge for an hour at a station like Oakleigh Park, at a busy time of day and you’ll be lucky to see ten trains.

There is a lot more capacity on the slow lines of the East Coast Main Line, to use to add extra services between London and Welwyn Garden City.

Adding services that go further North than  Welwyn Garden City will need a solution to the double-track section over the Digswell Viaduct.

Frequency Of The Hertford Loop Line

I said this earlier.

My scheduling experience says that with a well-programmed computer calling the shots, that at least twenty tph along the Hertford Loop Line would be a serious possibility.

I also think that the slow lines of the East Coast Main Line can handle the same frequency, so I very much stand by my original fugure.

Is There An ERTMS-based Solution To The Digswell Viaduct?

Consider.

  • Airliners have been flown automatically and safely from airport to airport for perhaps four decades.
  • The Victoria Line has been running automatically and safely at over twenty tph for five decades.
  • I worked with engineers developing a high-frequency sequence control system for a complicated chemical plant in 1970.

We also can’t deny that computers are getting better and more capable.

For these reasons, I believe there could be an ERTMS-based solution to the problem of the Digswell Viaduct, which could be something like this.

  • All trains running on the two track section over the Digswell Viaduct and through Welwyn North station would be under computer control between Welwyn Garden City and Knebworth stations.
  • Fast trains would be slowed as appropriate to create spaces to allow the slow trains to pass through the section.
  • The driver would be monitoring the computer control, just as they do on the Victoria Line.

Much more complicated automated systems have been created in various applications.

The nearest rail application in the UK, is probably the application of digital signalling to London Underground’s Circle, District, Hammersmith & City and Metropolitan Lines.

This is known at the Four Lines Modernisation and it will be completed by 2023 and increase capacity by up to twenty-seven percent.

I don’t think it unreasonable to see the following numbers of services running over the Digswell Viaduct by 2030 in both directions in every hour.

  • Sixteen fast trains
  • Four slow trains

That is one train every three minutes.

Currently, it appears to be about ten fast and two slow.

As someone, who doesn’t like to be on a platform, when a fast train goes through, I believe that some form of advanced safety measures should be installed at Welwyn North station.

Some Questions

Various people over recent months have asked me questions about possible improvements to the Moorgate Line.

Could There Be A Direct Escalator Connection Between Bowes Park Station On The Hertford Loop Line and Bounds Green Station On The Piccadilly Line?

This map from carto.metro.free.fr, shows the two stations.

Bounds Green station is one of the Piccadilly Line’s classic stations.

I took the picture, when I walked between the Bowes Park and Bounds Green stations

It is a level walk, that could be better signed and  if the two stations were to be made step-free it would be an easier interchange than that at Finsbury Park.

In my view, improving the two stations and the local environment, would be much better value than an expensive escalator connection.

Should There Be A Second London Terminal?

Kings Cross is used as a London terminal at times, but would there be much of a necessity.

Passengers can use the following connections to get to Kings Cross and other stations along Euston Road.

  • A cross-platform interchange at Finsbury Park with Thameslink
  • A cross-platform interchange at Highbury & Islington with the Victoria Line
  • When Crossrail opens, there will be a step-free connection with the Circle, Hammersmith & City and Metropolitan Lines at Moorgate.

Passenger numbers will decide.

Could The Moorgate Line Be Extended South To Bank Station?

The original Victorian plans for the Moorgate Line show the line extended to a station at Lothbury, which is just behind the Bank of England. This Google Map shows the area.

These pictures show the area, where Lothbury and Moorgate meet.

Given the difficulty of handling the logistics of all the tunnelling for the Bank station upgrade, I don’t think the City of London would look too kindly on a rail extension between Moorgate and Bank, especially, as there is already the Northern Line and even I can walk it easily.

It could be argued as Moorgate is served by Crossrail and Bank station isn’t, that there will be a high level of passenger traffic between the  two stations.

Consider.

  • It is only five hundreds to walk.
  • The Northe Line is jammed solid between London Bridge and Kings Cross in the Peak.
  • After the completion of the massive Liverpool Street-Moorgate double-ended Crossrail station and the Bank Station Capacity Upgrade, a one stop on either the Central Line or the Northern Line will be step-free.
  • The Liverpool Street-Moorgate Crossrail station will hopefully have a selection of entrances with good connections to walking routes leading South towards Bank.
  • The City of London is planning to make the streets of the city more friendly to walking and cycling.
  • More and taller towers are increasing employment in the City.

Will the walking routes and the Central and Northern Lines be overwhelmed?

I think they could be, but there could be other solutions.

  • Opening up of more walking routes and improving the already pretty good street maps and signage.
  • A redesign of the bus network with high capacity electric buses taking over the routes between Old Street and London Bridge stations.

I also wonder, if it would be possible to dig a pedestrian tunnel between the two stations under the existing roads and fit it with travelators.

The ingenuity that has been shown in the Bank Station Capacity Upgrade has probably suggested a few ideas.

But I’m absolutely sure there will be no extension of the railway pass Moorgate.

Is The Interchange With Thameslink At Finsbury Park Frequent Enough?

It seems that Thameslink will run four tph through Finsbury Park station.

  • All will have cross-platform interchange with Moorgate Line services.
  • All services will serve London Bridge, East Croydon and Gatwick Airport stations.

Are these enough services?

Passenger numbers will decide.

Should Some Thameslink Services Use The Hertford Loop?

I said this earlier.

Thameslink services serving Peterborough would still use the East Coast Main Line, so they could call at Welwyn North and Knebworth stations, but why not divert the four trains per hour (tph) that serve Cambridge onto the Hertford Loop Line at Stevenage, to ease pressure over the Digswell Viaduct.

It possibly is an idea, but I also believe, that ERTMS signalling could offer an elegant solution to the Digswell Viaduct problem.

Could The Moorgate Line Have Some New Park-An-Ride Stations?

There are two possibilities on the Hertford Loop Line.

This Google Map shows where the Hertford Loop Line crosses the M25, to the North of Crews Hill station.

It would probably be impossible to build a Park-and-Ride station in this area now, but if the M25 had been designed in an holistic and environmentally-sympathetic manner, it could have been a place for such a facility.

There must also be the possibility of building a Park-and-Ride or more likely a Cycle-and-Ride station to the South of Stevenage, as the town develops, as it surely will in the next decade.

From my helicopter, it doesn’t look promising to add more parking except possibly at Hadley Wood station. This page from Hansard is a good summary of GNER’s original proposal in about 2000.

Should The Moorgate Line Be Taken Over By Transport for London?

Consider.

  • This is certainly a desire of the London Mayor; Saddiq Khan.
  • After the farce of the Metropolitan Line Extension at Watford will Greater London and Hertfordshire be able to work together over the route?
  • There are twelve stations in Hertfordshire and twenty in Greater London.
  • Stations are in four Greater London Boroughs; Barnet, Enfield, Haringey and Islington with Moorgate actually in the City of London.

The line might improve as part of Transport for London, but agreeing the management and development strategy for the line, with all those politicians of different colours, could be a nightmare.

Conclusion

Without doubt all of the parts of the Moorgate Line can handle at least twenty tph and possibly more, once the following conditions are met.

  • Full ERTMS signalling on all lines.
  • The stations are capable of handling the increased number of passengers.
  • There are a few more trains.

Automatic Train Control may need to be used in certain sections, as it will be on Crossrail and Thameslink.

What Would This Mean For Passengers?

The current pattern of train services in the Off Peak is as follows.

  • 4 tph – Welwyn Garden City
  • 2 tph – Hertford North
  • 1 tph – Watton-at-Stone
  • 1 tph – Stevenage

Note.

  1. This is well below the future capacity of the section between Moorgate and Alexandra Palace stations
  2. It needs eight trains for each branch or a total of sixteen trains.

The simplest pattern would be twenty tph between Moorgate and Alexandra Palace stations, which would serve the following destinations.

  • 10 tph – Welwyn Garden City
  • 5 tph – Hertford North
  • 5 tph – Stevenage

Note.

  • Intermediate stations, like New Barnet and Cuffley would get a train every six minutes.
  • The service would need forty trains.
  • I doubt Great Nortern would want to finance the extra trains.

Cutting the service back to somewhere in between would also work.

  • 6 tph – Welwyn Garden City
  • 3 tph – Hertford North
  • 3 tph – Stevenage

Note.

  1. Intermediate stations, like New Barnet and Cuffley would get a train every ten minutes.
  2. The service would need twenty-four trains.

As there are twenty-five Class 717 trains, is this Great Northern’s plan?

It looks to me like a plan designed by Great Northern’s accountants based on the least they can get away with.

An Improved Service For South Hertfordshire

Consider.

  • The extra platform and remodelling at Stevenage station are ambitious and the new platform could probably handle six tph.
  • Stevenage has an LN|ER service to the North of two tph.
  • East Coast Trains intend to start a service linking Stevenage to Newcastle and Edinburgh.
  • Healthcare in South Hertfordshire sends patients to hospitals at Barnet and Stevenage, neither of which are easy from a station like Cuffley
  • Bus services across are not for the frail, elderly and impatient.
  • There is no rail link between Hertford and Hatfield except with a change at Alexandra Palace station, which is not step-free.

Perhaps the Moorgate train service should be as follows.

  • 8 tph – Welwyn Garden City
  • 4 tph – Hertford North
  • 4 tph – Stevenage

Note.

  1. Importantly, there would be four tph to between Alexandra Palace and Stevenage.
  2. The Stevenage services would link up to the improved fast services between Stevenage and the North of England and Scotland.
  3. Intermediate stations, like New Barnet and Cuffley would get a train every seven-eight minutes.
  4. The service would need thirty-two trains, which is probably another eight trains.

I also think, that Alexandra Palace station should be made step-free to ease journeys from one side of Hertfordshire to the other.

 

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December 1, 2019 Posted by | Transport | , , , , , , , , , | 7 Comments

Integration Of High-Speed And Commuter Services Out Of Kings Cross Station

The East Coast Main Line ECML) has the following services on the Southern section between Kings Cross and Peterborough.

  • Express services capable of at least 125 mph running from LNER , Grand Central, Hull Trains and other Open Access operators.
  • Great Northern services capable of 110 mph running between Kings Cross and Cambridge and Ely.
  • Great Northern services to Peterborough appear to have been discontinued.
  • Thameslink services capable of 100 mph running between Kings Cross and Cambridge and Peterborough.

It would appear that the slower  Great Northern and Thameslink services will get in the way of the faster trains, if they need to use the fast lines.

The Digswell Viaduct

A particular problem will be the double-track section of line through Welwyn North station and over the Digswell Viaduct.

There are two Great Northern and  six Thameslink services in each hour, that are not capable of operating at 125 mph on the double-track section.

Following the logic of Oxford and Bedwyn services out of Paddington, which are now run by 125 mph Class 802 trains, I feel that timetabling would be easier on the ECML, if there were 125 mph trains running Great Northern and Thameslink services to Cambridge, Ely and Peterborough.

I explored 125 mph services to Kings Lynn in Call For ETCS On King’s Lynn Route, after reading about a proposal in Rail Magazine. They certainly look like they’d give advantages.

Some idiot decided that Thameslink services were fine with a 100 mph top speed. They should have been 110 mph or even faster trains, so that they could cross the Digswell Viaduct without slowing high speed services.

Digital Signalling

Digital signalling will be installed on the Southern section of the East Coast Main Line

This could ease the problem of the double-track section, as all trains should eventually be timed more precisely.

More Use Of The Hertford Loop

Perhaps some or all of the six 100 mph Thameslink services, could use an upgraded Hertford Loop Line, which will be fitted with digital signalling.

125 mph Trains

In a last resort, it would surely be more affordable to run 125 mph commuter trains to Cambridge, Ely and Peterborough, than put put two extra tracks on the Digswell Viaduct.

March 20, 2019 Posted by | Transport | , , , | 5 Comments

Nervous Operators Force Network Rail To Defer King’s Cross Plan

The title of this post is the same as that of this article on Rail Magazine.

King’s Cross station has to be closed for three months, so that tracks, electrification and signalling can be replaced and modernised for about 1.5 miles from the buffer stops at the station.

The original dates of the closure were to have been between December 2019 and March 2020, but now it looks like it could be delayed by up to a year.

The article on the web site, is a shortened version of the article in the magazine, where this is said.

Closure dates have yet to be announced, and NR is still developing a passenger handling strategy which could include long-distance services at Finsbury Park or some services terminating at Peterborough. Some trains could even be rerouted into London Liverpool Street.

I wonder, if Network Rail’s planners are cursing that the around thirty miles between Peterborough and Ely is not electrified.

If it were electrified, it would allow electric trains as well as diesel and bi-mode trains to access Liverpool Street station via the West Anglia Main Line.

What Benefits Would There Be From Electrifying Peterborough To Ely?

I can imagine Oxford-educated civil servants in the Department of Transport and The Treasury dismissing calls for more electrification in the backwater of East Anglia, after the successful electrification to Norwich in the 1980s.

But now Cambridge is powering ahead and East Anglia is on the rise, with the massive Port of Felixstowe needing large numbers of freight trains to other parts of mainland UK.

This East Anglian success gives reasons for the electrification of the Peterborough-Ely Line.

Direct Electric Trains Between Peterborough And Cambridge

I have met Cambridge thinkers, who believe that Peterborough is the ideal place for businesses, who need to expand from Cambridge.

Peterborough has the space that Cambridge lacks.

But the transport links between the two cities are abysmal.

  • The A14 is only a two-lane dual-carriageway, although a motorway-standard section is being added around Huntingdon.
  • Peterborough station has been improved in recent years.
  • The direct train service is an hourly three-car diesel service between Birmingham and Stansted Airport, which doesn’t stop at the increasingly-important Cambridge North station.

The road will get better, but the rail service needs improvement.

  • There needs to be at least two direct trains per hour (tph) between Cambridge and Peterborough.
  • They would stop at Cambridge North, Waterbeach, Ely and March.
  • End-to-end timing would be under an hour.
  • Greater Anglia will have the four-car bi-mode Class 755 trains, which would be ideal for the route from next year.

If the Peterborough- Ely Line was electrified, Greater Anglia could use five-car Class 720 trains.

An Electric Diversion Route For The East Coast Main Line

The works at Kings Cross station, and the possible proposal to run some trains into Liverpool Street station, show that an electric diversion route would be useful, when there are closures or problems on the East Coast Main Line.

In the case of the Kings Cross closure, if Peterborough were to be used as the terminal for some trains from the North, then I suspect some high-capacity Class 800 trains could shuttle passengers to Liverpool Street.

If the date of the Kings Cross closure is 2020, then certain things may help.

  • Crossrail will be running.
  • Extra trains will be running from Finsbury Park to Moorgate.
  • Hull Trains will be running bi-mode Class 802 trains.
  • There could be more capacity on the West Anglia Main Line.
  • There could be more capacity and some longer platforms at Liverpool Street.

What would really help, is the proposed four-tracking of the West Anglia Main Line.

The latter could prove extremely useful, when Network Rail decide to bite the bullet and four-track the Digswell Viaduct.

Extending Greater Anglia’s Network

Greater Anglia have bought new bi-mode Class 755 trains.

This would appear to be more than enough to covering the current services, as they are replacing twenty-six trains with a total of fifty-eight coaches with thirty-eight trains with a total of one hundred and thirty-eight coaches.

That is 46 % more trains and 137 % more coaches.

The new trains are also genuine 100 mph trains on both electricity and diesel.

Obviously, Greater Anglia will be running extra services, but with the explosive growth around Cambridge, coupled with the new Cambridge North station, I feel they will be running extra services on the Peterborough to Cambridge route and perhaps further.

The new Werrington Grade Separation will make a difference.

  • It will open in a couple of years.
  • Trains between Peterborough and Lincoln won’t block the East Coast Main Line.
  • The Leicester route could also be improved.

So services to and from Lincoln and Leicester would probably be easier to run from Cambridge and Stansted Airport.

CrossCountry run a service between Birmingham New Street and Stansted Airport stations.

  • The service stops at Coleshill Parlway, Nuneaton, Leicester, Melton Mowbray, Oakham, Stamford, Peterborough, March, Ely and.Cambridge and Audley End stations.
  • The service doesn’t stop at Cambridge North station.
  • The service is run by an inadequate Class 170 train, which sometimes is only two coaches and totally full.
  • Trains take just over three hours ten minutes for the journey.

Will Greater Anglia take over this route? Or possibly run a second train as far as Leicester?

Their Class 755 trains with better performance and specification would offer the following.

  • Electric running between Ely and Stansted Airport stations.
  • Greater passenger capacity.
  • wi-fi, plugs and USB sockets.
  • A three hour journey both ways.
  • The extra performance would probably allow an extra important stop at Cambridge North station.

The new trains would certainly offer what passengers want.

CrossCountry run an extra train between Birmingham New Street and Leicester, so perhaps at the Western end, the Greater Anglia service need only go as far as Leicester.

At the Stansted end of the route, there will be an hourly train between Stansted Airport and Norwich, so there could be scope for perhaps cutting one the services back to Cambridge.

Obviously, time-tabling would sort it out to the benefit of the train operators and passengers, but I can envisage a set of services like this.

  • Norwich and Stansted Airport – Greater Anglia – 1 tph
  • Birmingham New Street and Stansted Airport – CrossCountry – 1 tph
  • Leicester and Cambridge – Greater Anglia – 1 tph
  • Colchester and Peterborough – 1 tph
  • Norwich and Nottingham (Currently Liverpool Lime Street) – 1 tph

Adding these up you get.

  • Stansted Airport and Cambridge – 2 tph – As now!
  • Stansted Airport and Cambridge North – 2 tph – New service!
  • Cambridge and Ely – 4 tph – At least!
  • Ely and Peterborough – 4 tph – At least!
  • Cambridge and Peterborough – 2 tph – Up from 1 tph
  • Stansted Airport and Peterbough – 1 tph – As now!
  • Cambridge and Leicester – 2 tph = Up from 1 tph.

This pattern or something like it would be much better for all.

If the Ely-Peterborough section of the were to be electrified then it would enable the following.

  • A reduced journey time for electric or bi-mode trains.
  • If required Greater Anglia could run an extra electric service using Class 720 trains between Stansted Airport and Peterbough.

I said earlier that the Werrington Grade Separation will make it easier to run services between Peterborough and Lincoln.

So why not add an hourly service between Cambridge and Lincoln?

I can envisage, when the West Anglia Main Line is four-tracked at the southern end, that there might be enough capacity for a Liverpool Street to Lincoln service via Cambridge, Cambridge North, Ely, Peterborough, Spalding and Sleaford.

But whatever happens Greater Anglia’s choice of bi-mode Class 755 trains, seems to give them the flexibility to match services to passengers needs.

Electro-Diesel and Battery-Electric Freight Locomotives

The Class 88 locomotive is an electro-diesel freight locomotive, that can use either power from overhead electrification or an pnboard diesel engine.

I believe that locomotives like this will become more common and that eventually, we’ll see a battery-electric heavy freight locomotive.

I wrote about the latter in Thoughts On A Battery/Electric Replacement For A Class 66 Locomotive.

The Peterborough-Ely Line will see increasing numbers of trains hauled by these powerful electric locomotives, with either diesel or battery power to propel them over the gaps in the electrification.

Electrifying the line would speed these hybrid trains through and increase the capacity of the route.

Conclusion

Network Rail have annoyed the train operators with their planning and timing of the upgrade at Kings Cross station.

It looks to me, that the part of the problem, is that there is no viable electrified secondary route to London.

Bi-mode trains can use the Peterborough-Ely Line to go to Liverpool Street via Cambridge.

This line is one of those routes that sits in a sea of electrification, which carries a lot of traffic, that would bring several benefits if it were to be electrified.

  • Direct electric trains between Cambridge and Peterborough, would greatly improve the spasmodic service between the two cities, with large economic benefits to the county.
  • An electric diversion route would be created from Peterborough to Liverpool Street via Ely and Cambridge.
  • It would allow Greater Anglia to develop routes West of Cambridge to places like Lincoln and Leicester using their future fleet of Class 755 trains.
  • It would also make it easier for battery-electric freight locomotives to cover the busy freight route between Felixstowe and Peterborough.

I also feel that it wouldn’t be the most difficult route to electrify.

The Fens are flat.

There is no history of mining.

The track is fairly straight and simple.

I suspect that it could become a high-quality 90-100 mph, electrified line.

 

 

 

 

 

 

 

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December 8, 2018 Posted by | Transport | , , , , , , , , , , , | Leave a comment

Could We Just Double The Width Of The Digswell Viaduct?

The Digswell Viaduct and the associated double-track railway through Welwyn North station at its northern end, on the East Coast Main Line is probably one of the biggest bottlenecks on railways in the UK. Wikipedia says this about the Grade II* Listed viaduct.

The viaduct carries the East Coast Main Line, which has to narrow from four tracks to two to cross the viaduct, making it a bottleneck restraining capacity over this strategic transport route. This problem is exacerbated by Welwyn North railway station situated at the northern end of the viaduct, which blocks the line while trains are stationary and two tunnels to the north. Several ideas to overcome the limitations of the viaduct and station without damaging the viaduct’s essential historic character and rhythmic design are periodically discussed. The line was electrified in the 1970s.

Various plans have been put forward to remove the bottleneck cause by this masterpiece of Victorian engineering.

The Current Capacity

Network Rail have published this report, which is entitled The Capacity Of The Welwyn Viaduct. This is said about the capacity of the twin-track section.

The two track section between Woolmer Green Junction and Digswell contains both Welwyn Viaduct and Welwyn Tunnel and is approximately 2.5 miles in length.

In pure theoretical terms the capacity of the viaduct is dictated by the headway over the section.

There is a planning headway of 3 minutes over the two track section which therefore results in a theoretical maximum capacity of 20 trains per hour. To achieve this capacity would require a fully homogeneous service (for example same rolling stock and calling patterns) and 100% use of planning capacity.

The usable capacity is below the theoretical and is determined by the service specification which needs to use the capacity. The current and future specifications for the section require calls at Welwyn North Station which is on the two track section. This reduces the number of paths that can be achieved in a single hour over the viaduct. The usable capacity is also determined by the fast line capacity between Finsbury Park and Digswell and the difference in speed of rolling stock approaching the two track section which will determine whether trains can be flighted over the viaduct at 3 minute slots to achieve the theoretical capacity.

There is no defined permitted number of paths on the viaduct as the capacity available is a function of demand and therefore the type and number of services which need to use it.

Network Rail concludes that eighteen trains per hour is a theoretical maximum on the current track layout.

Reason For Removal Of The Bottleneck

Whether or not HS2 is built, the East Coast Main Line must be improved to handle the large and ever growing traffic between London and Leeds, Newcastle and Edinburgh.

If more of the line was four-track, it would make the train companies aim of a frequent four-hour service to Edinburgh achievable. It could be even faster, if a lot of the line could handle trains at one hundred and forty mph, rather than the current one hundred and twenty-five.

Proposed developments are detailed in Wikpedia.

One of the most important is removing the bottleneck at Welwyn.

One Problem Or Two?

I think that when outsiders look at this bottleneck, they see one problem, but I think it is fair to describe it as two.

  • Welwyn North station and the tunnels to the North.
  • The Digswell Viaduct itself

In my view both problems need their own solutions.

We shouldn’t also forget other smaller changes, that can take the pressure of the area.

  • More and better use of an upgraded Hertford Loop Line.
  • More precise and better timetabling of trains.
  • As Thameslink beds down, we’ll see other improvements.

I also wonder, if a fully-electrified freight route could be created between Peterborough and London, through March, Ely and Cambridge, that used the extra capacity of a four-tracked West Anglia Main Line.

Welwyn North Station

In some ways the station is as big a bottleneck as the viaduct, as the two trains an hour that stop in the station, effectively block the line for a few minutes.

It is also one of those heritage problems, that Network Rail love so much. This is said in the Wikipedia entry for the station.

The station is a rare survival of architecture from the early days of the GNR and this is now recognised with listed building status. The main station building, the footbridge, the tunnel portal to the north and Welwyn Viaduct to the south are all Grade 2 listed.

So I doubt that modifying the station will be easy.

This Google Map shows the lines through the station.

Welwyn North Station

Welwyn North Station

These are some pictures of Welwyn North station taken on another day.

The images,  probably shows another problem in that four-tracking the line through Welwyn North station would probably close the car parks.

The Digswell Viaduct

The Digswell Viaduct is an iconic structure and if the views of the viaduct and the valley it crosses were to be altered in any negative way, there would be a battle that would make the protests over HS2 look like a child’s tea party.

Around 1890, they had a similar capacity problem at the Stockport Viaduct, which was successfully widened from two tracks to four.

It is my view, that with major advances in structural engineering and construction methods, that widening the viaduct would be one of the better methods to improving the capacity through the area, without changing the look of the viaduct.

Intriguingly, if the East Coast Main Line was not already electrified, with the recent development of IPEMU-technology, I suspect now that Network Rail would think seriously about not electrifying the viaduct.

Trains would cross using their on-board energy storage, raising and lowering their pantographs appropriately.

Knebworth Station

This Google Map shows Knebworth station, a few miles to the North of Welwyn North.

KnebworthStation

This station has four platforms arranged on two islands.

For comparison, this is an image of Welwyn North station to the same scale.

A1

I think that four-tracking Welwyn North station will be a tight fit.

Comclusion

At some point, I feel that Network Rail will bite the bullet on four-tracking this section of line and the fight will be a big one.

 

March 14, 2016 Posted by | Transport | , , | 3 Comments