The Anonymous Widower

The Future Of Class 378 Trains

This post is a musing on the future of the Class 378 trains.

The Thames Tunnel

The Thames Tunnel is the tail that wags the East London Line, when it comes to trains.

  • For evacuation and safety purposed, trains running through the tunnel, must have an emergency exit through the driver’s cab.
  • It hasn’t happened yet, as far as I know, but a version of Sod’s Law states if you ran trains without this emergency exit, you’d need to use it.
  • London Overground’s Class 378 trains have this feature, but their Class 710 trains do not.

So it would appear that until Bombardier build an Aventra with an emergency exit through the driver’s cab, that the existing Class 378 trains must work all services through the Thames Tunnel.

Incidentally, I can’t think of another long tunnel, that might be served by the London Overground, so it could be that Class 378 trains will be the only trains to go through the Thames Tunnel, until they wear out and need to go to the scrapyard.

Six Car Trains On The East London Line

I covered this in Will The East London Line Ever Get Six-Car Trains? and I came to this conclusion.

I will be very surprised if Network Rail’s original plan on six-car trains on the East London Line happens in the next few years.

It might happen in the future, but it would need expensive platform extensions at Shadwell, Wapping, Rotherhithe and Canada Water and Surrey Quays stations.

Increased Frequency On The East London Line

If five-car Class 378 trains are the limit, the only way to increase capacity of the East London Line would be to increase frequency.

The current frequency of the East London Line is sixteen trains per hour (tph)

There are four tph on each of these routes.

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

Two increases are planned.

  • 2018 – 6 tph – Highbury & Islington And Crystal Palace
  • 2019 – 6 tph – Dalston Junction And Clapham Junction

This would increase the frequency of the East London Line to twenty tph.

It will probably mean an updated digital signalling system on the East London Line.

Eventually, I think it likely, that a full ERTMS system as is fitted to Thameslink and Crossrail will be fitted to at least the East London Line, but possibly the whole Overground network.

Digital signalling would certainly allow the twenty-four tph frequency of Thameslink and CXrossrail, which could mean that the four routes all received a frequency of four tph.

But Thameslink and Crossrail are theoretically capable of handling thirty tph or a train every two minutes, through their central tunnels.

If the two modern multi-billion pound tunnels can handle 30 tph, why can’t their little brother, that started life as a half-million pound pedestrian tunnel in 1843,

The Number Of Trains Needed For The Current Service

If I go through the routes of the original Overground, I find the following.

Dalston Junction And Clapham Junction

Trains take 46 minutes to go South and 44 minutes to come North and a round trip would take two hours.

This means that the current four tph service would need eight trains.

A six tph service in the future would need twelve trains.

Dalston Junction And New Cross

Trains take 22 minutes both ways and a round trip would take an hour.

This means that the current four tph service would need four trains.

A six tph service in the future would need six trains.

Highbury & Islington And Crystal Palace

Trains take 44 minutes to go South and 43 minutes to come North and a round trip would take two hours.

This means that the current four tph service would need eight trains.

A six tph service in the future would need twelve trains.

Highbury & Islington And West Croydon

Trains take 52 minutes both ways and a round trip would take two hours.

This means that the current four tph service would need eight trains.

A six tph service in the future would need twelve trains.

This means that the current four tph on all four routes needs twenty-eight trains.

The Proposed 2020 Service

This will have two extra tph to Crystal Palace and Clapham Junction and will need thirty-six trains.

Six Trains Per Hour On All Four Routes

as each route terminates at both ends in a single platform, which can handle six tph, with the right signalling, I feel that this could be the design objective of the East London Line, when it was built in the early-2010s.

This could be achieved with forty-two trains, leaving perhaps twelve to fifteen trains for other duties, depending on how many are needed on stand-by or are in maintenance.

What Could Be Done With Twelve Trains?

As I calculated earlier, three routes need twelve trains to provide a six tph service.

  • Dalston Junction And Clapham Junction
  • Highbury & Islington And Crystal Palace
  • Highbury & Islington And West Croydon

All three services take between 44 and 52 minutes.

So could another six tph service that takes around this time be added to the current four services?

Willesden Junction As A Northern Terminal

Trains could take the North London Line to Willesden Junction and terminate in the Bay Platform 2.

I estimate the following timings from Willesden Junction.

  • Highbury & Islington – 27 mins
  • Dalston Junction – 31 mins
  • Whitechapel –  – 41 mins
  • New Cross – 49 mins
  • Crystal Palace – 64 mins
  • Clapham Junction – 73 mins.
  • West Croydon – 74 mins

It would appear that the only possible Southern terminal of the current four, would be New Cross, as that is the only terminal within the 44-52 minute range of journey time.

So could a service between Willesden Junction and New Cross replace the current one between Dalston Junction and New Cross?

  • It would need to be run using dual-voltage trains
  • Voltage changeover could be at Highbury & Islington station.
  • Extending the New Cross service would free up a bay platform at Dalston Junction station.
  • It should be possible to have a frequency of six tph.
  • Serious modifications or additions to infrastructure would probably not be required.

As running to Willesden Junction was talked about before the Overground opened, I wonder if the numerous crossovers on the North London Line, already allow trains from the East London Line to terminate at Willesden Junction.

Southern Terminals Via New Cross Station

This map from carto.metro.free.fr shows the lines at New Cross station.

Note how the double-track East London Line, shown in orange, arrives from Surrey Quays station arrives in the North-Western corner of the map, becomes a single-track and then goes under the main lines before going into the bay platform D.

This Google Map shows the same area.

The London Overground track is clearly visible.

Could extra track be added, to enable the following?

  • Southbound trains could join the main line and stop in Platform C
  • Northbound could leave the main line after stopping in Platform A and go towards Surrey Quays station.

If this is possible, then trains could run between Dalston Junction and Lewisham stations.

Once at Lewisham they would have choice of Southern terminal,

Hayes As A Southern Terminal

Consider a service between Dalston Junction and Hayes stations.

  • I estimate that a train could go between the two stations in 53 minutes.
  • Hayes station has two terminal platforms

Six tph would probably be too many services, but 2-3 tph might be very welcome.

Orpington As A Southern Terminal

Consider a service between Dalston Junction and Orpington stations.

  • I estimate that a train could go between the two stations in 47  minutes.
  • Orpington station has three terminal platforms.

Six tph would probably be too many services, but 2-3 tph might be very welcome.

A Combined Hayes And Orpington Service

As a case can be made for services to both Hayes and Orpington via Lewisham, I think the ideal service could be two tph to both Hayes and Orpington.

  • There would be four tph between Dalston Junction and Lewisham.
  • Stations on the East London Line would have access to the important interchange station at Lewisham.
  • Several stations on the routes to Hayes and Orpington would have a two tph service to Crossrail and the Jubilee Line.

Other Stations Via New Cross

Looking at rail maps, there would seem to be several possibilities including with their times from Dalston junction station.

  • Beckenham Junction – 41 mins
  • Bromley North – 40 mins
  • Gove Park – 35 mins

There are probably others.

Southern Terminals Via Peckham Rye Station

As an example Streatham Common station is planned to be a major interchange and is 43 minutes from Dalston Junction.

Would a bay platform work here as an East london Line terminal?

Conclusion

If all fifty-seven Class 378 trains worked the East London Line, they could run six tph on the current routes.

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

It would need forty-two trains.

Suppose the Dalston Junction and New Cross service was replaced with a Willesden Junction and New Cross service.

  • This would provide a useful direct four tph service between East and North London.
  • Changing at Highbury & Islington station would be avoided for a lot of journeys.
  • The journey time wold be around 49 minutes.
  • A two tph service would need four trains.
  • A four tph service would need eight trains.
  • A six tph service would need twelve trains.
  • Many journeys between North and South London would now be possible with just a single same platform interchange.

To run the following frequencies on this route would mean these total frequencies on the East London Line and total numbers of trains.

  • 2 tph – 20 tph – 40 trains
  • 4 tph – 22 tph – 44 trains
  • 6 tph – 24 tph – 48 trains

I think that if the figures are juggled a bit, there is enough trains to run extra services to one or more Southern destinations from Dalston Junction.

My preference would be a split service of 2 tph to both Hayes and Orpington via New Cross, where some new track would be needed.

This would do the following.

  • Create a frequent connection between South-East and North-East London.
  • Both areas would be connected to Crossrail and several Underground Lines, including the future Bakerloo Line Extension.
  • The Hayes Line would be shared between Overground and Southeastern trains.

No more new trains or large amounts of new infrastructure would be needed.

I suspect that London Overground and the new Southeastern franchise can do better than my musings.

 

 

May 10, 2019 Posted by | Transport | , , , , , , , , | 2 Comments

Orpington Station – 3rd August 2015

After my exploration at Penge, took a train from Penge East station to Orpington station.

These pictures I took, show a well-appointed station with full step-free access and a selection of long through and bay platforms.

Could Orpington be one of the extra destinations that are needed by the East London Line?

It takes thirty four minutes of travelling time to get to Whitechapel changing at New Cross at the moment, so it is actually closer than West Croydon, which takes forty minutes.

The route passes through a series of important and busy stations like New Cross, Lewisham and Petts Wood. It could either be via Beckenham Junction and Bromley South or via Hither Green and Chislehurst.

Using Opington as a destination  for the East London Line would appear to connect a lot of South East London to Crossrail at Whitechapel and the Jubilee Line at Canada Water.

It would also fit in well with Transport for London’s desire to take over services in South East London. The Wikipedia entry says this.

However, since taking over the West Anglia services, TfL have once again proposed to take over the suburban routes, currently operated by Southeastern after their franchise ends. The opposition to TfL taking over routes from Kent County Council have softened after a London Assembly meeting, which Kent County Council attended. Kent have set out “red lines” to its support, stating no Southeastern Mainline service should be negatively affected by a take over by TfL.

So bringing an uprated  East London Line to Orpington might appear on the surface to fit in well with TfL’s ambitions.

It certainly seems that they have big ambitions in South East London.

Could it be Borough Jealousy?

Councils like Bromley have seen the improvements in transport and the related benefits in Northern boroughs like Hackney, Islington and Brent and want a piece of Orange action themselves.

August 3, 2015 Posted by | Transport | , , | 1 Comment