Did My InterCity225 From Leeds Arrive Like An Airliner In King’s Cross?
Consider.
- I took the 18:40 from Leeds to London King’s Cross today.
- The train was an British Rail-era InterCity 225 in superb condition.
- The train consisted of a Class 91 electric locomotive and seven Mark 4 coaches.
- The train was scheduled to stop at Wakefield Westgate, Doncaster, Grantham and Peterborough.
- The Southern section of the East Coast Main Line is fully digitally-signalled at least as far as Welwyn.
- I assume that means Welwyn North station, which is to the North of the Digswell Viaduct.
- According to Real Time Trains my train was on time, one minute fast, four minutes fast and two minutes fast at the four stops.
- South of Welwyn North station, the train is shown as either one or two minutes ahead of schedule.
- The train arrived in London King’s Cross a minute ahead of schedule at 20:52.
As a Graduate Control Engineer, I believe that from Welwyn North station, the signalling was being used to instruct the driver, what speed he needed to arrive in King’s Cross on time.
This resulted in the slight oscillations in the scheduled time, between Welwyn North station and London King’s Cross.
These are my further thoughts.
Just Like An Airliner
I have well over a thousand hours in command of light aircraft and I held an IMC rating, which is a UK-only qualification, so you can do limited flying on instruments.
As an example, I have done full instrument approaches at major airports like
Belfast Harbour, Dublin, Edinburgh, Hamburg, Leeds, Liverpool, Naples, Prestwick and Stansted, where you guide the plane in so that it is a certain height, at a particular distance from the runway.
Your instruments tell you the height to be at and the direction to fly using a device called an instrument landing system or ILS.
With trains, I suspect, digital signals just give the train or driver, a speed at which to travel.
I believe that if the train is instructed by the digital signals a higher percentage of trains will more likely arrive on time or perhaps up to a couple of minutes early.
The Newark Flat Crossing
I wrote about this notorious piece of track in The Newark Crossing.
My train today crossed the Newark Crossing, exactly on time.
- So was it being digitally-controlled through the crossing?
- Many trains on the East Coast Main Line cross the Newark Crossing within a couple of minutes of their scheduled time.
- For the system to work well trains crossing the East Coast Main Line must also be under control of the digital signalling or the drivers must adhere closely to their schedules.
I believe that full digital signalling will improve safety, where trains cross, join or leave a main line.
Crossing The Digswell Viaduct
This is a two-track section between Welwyn Garden City and Welwyn North stations.
- Various plans to make it four-track have been abandoned over the years, as it would cost billions of pounds.
- My train ran through the section two minutes ahead of schedule.
- Looking at trains on the section between Welwyn Garden City and Welwyn North stations, they seem to maintain the same difference from their scheduled time.
I believe that the digital signalling could be instructing the trains, so that scheduled times are maintained.
Conclusion
I believe as a Graduate Control Engineer, that applying full digital signalling to the UK’s railways, will have the following effects.
- Improved timekeeping.
- Increased safety.
- More capacity.
- It could save on the cost of new infrastructure, by avoiding the building of new track, bridges and flyovers.
- From my experience of installing control systems on industrial plant at Enfield Rolling Mills and ICI, many trains and locomotives can be fitted with add-on control systems. In fact, full digital signalling has already been applied to steam locomotives.
We should complete digital-signalling for the East Coast Main Line and then roll it out for other lines, in order of importance.
What Will Be The Fastest Times Possible Between London King’s Cross And Leeds?
According to media reports, it is likely that the Eastern Leg of High Speed Two will be scrapped on kicked into the long grass.
So out of curiosity, what times can be achieved between London King’s Cross and Leeds.
Wikipedia says this about digital signalling on the line.
Increasing maximum speeds on the fast lines between Woolmer Green and Dalton-on-Tees up to 140 mph (225 km/h) in conjunction with the introduction of the Intercity Express Programme, level crossing closures, ETRMS fitments, OLE rewiring and the OLE PSU – est. to cost £1.3 billion (2014). This project is referred to as “L2E4” or London to Edinburgh (in) 4 Hours. L2E4 examined the operation of the IEP at 140 mph on the ECML and the sections of track which can be upgraded to permit this, together with the engineering and operational costs.
Note.
- Woolmer Green is 23.8 miles North of King’s Cross and a short distance to the North of the Digswell Viaduct.
- Dalton-on-Tees is North of Doncaster, where the line to Leeds leaves the East Coast Main Line.
The 186 mile journey to Leeds can be broken down into these sections.
- King’s Cross and Woolmer Green – 23.8 miles – 16 minutes – 89.3 mph
- Woolmer Green and Doncaster – 132.2 miles – 85 minutes – 93.3 mph
- Doncaster and Leeds – 29.9 miles – 32 minutes – 56 mph
In Will Avanti West Coast’s New Trains Be Able To Achieve London Euston and Liverpool Lime Street In Two Hours?, I estimated that each stop in an electric Hitachi Class 802 train takes eight minutes, which includes six minutes accelerating and decelerating and a two minute dwell time in the station.
- Services between London Euston and Leeds typically stop three times, so this means there are four acceleration/deceleration cycles, if you add in the one split between London Kings Cross and Leeds.
- There are also three dwell times of perhaps two minutes in the intermediate stations.
- This would mean that a total of thirty minutes must be added to calculate the journey time.
If the train averaged these speeds over 186 miles, the following times would be achieved.
- 125 mph – 89 minutes
- 130 mph – 86 minutes
- 140 mph – 80 minutes
- 150 mph – 74 minutes
- 160 mph – 70 minutes
Adding in the thirty minutes for stops gives some reasonable timings for between London King’s Cross and Leeds.
There are ways that times could be reduced.
Removal Of Level Crossings
This course of action always brings results, but is hated by the local users.
This article in The Times is entitled HS2 Eastern Leg To Leeds Axed, where there is said.
The government’s long-awaited Integrated Rail Plan also commits to full electrification of the Midland Main Line from London St Pancras to Sheffield, as well as upgrades to the East Coast Main Line. The Times understands this includes removing level crossings, which will help reduce journey times.
Every little helps!
More Running At Higher Speeds
From my figures, it appears that roughly a ten mph increase in average speed reduces journey time by up to six minutes.
So the more running at 140 mph or even faster the better.
It should be noted that the Selby Diversion on the East Coast Main Line was designed by British Rail for 160 mph The Wikipedia entry says this.
The line was the first purpose-built section of high-speed railway in the UK having a design speed of 125 mph; however, research by British Rail in the 1990s indicated that the route geometry would permit up to 160 mph operation, subject to the necessary overhead line equipment and signalling upgrades.
Upgrading the line for higher speeds would be a way of reducing the journey time.
- Curves could be better profiled.
- Full digital signalling with perhaps even some degree of automatic control could be introduced.
- More robust overhead line equipment could be installed.
- Some sections of slab track could be laid.
- Level crossing removal.
I wouldn’t be surprised if one of the new Hitachi trains within a few years could be able to average 140 mph between London King’s Cross and Leeds, with a possible 160 mph average speed in the future.
Faster Acceleration And Deceleration
If the three-minute acceleration and deceleration times can be reduced to two minutes this will save eight minutes on the journey.
Quicker Dwell Times
Why not?
Automatic Train Control Through The Newark Crossing
I proposed this in Could ERTMS And ETCS Solve The Newark Crossing Problem? and I believe it would allow trains on the East Coast Main Line at full speed if they didn’t stop at Newark station.
Automatic Train Control Over The Digswell Viaduct And Through The Welwyn North Station
As at the Newark Crossing, I believe ERTMS and ETCS could increase speeds over the Digswell Viaduct and through Welwyn North station.
High-Speed Two Classic Compatible Trains
These faster trains could bring the time down further, if they were to run the service.
Sample Times
I wouldn’t be surprised to see with full digital signalling and a 125 mph average between London King’s Cross and Leeds.
- 125 mph Base Time – 89 minutes.
- Four Acceleration/Deceleration section at 6 minutes each – 24 minutes.
- Three Dwell Times at 2 minutes each – 6 minutes
This would mean a total time of one hour and 59 minutes.
Uprate that to 140 mph and faster acceleration and deceleration.
- 140 mph Base Time – 80 minutes.
- Four Acceleration/Deceleration section at 4 minutes each – 16 minutes.
- Three Dwell Times at 2 minutes each – 6 minutes
This would mean a total time of one hour and 42 minutes.
Uprate that to 160 mph and faster acceleration and deceleration.
- 160 mph Base Time – 70 minutes.
- Four Acceleration/Deceleration section at 4 minutes each – 16 minutes.
- Three Dwell Times at 2 minutes each – 6 minutes
This would mean a total time of one hour and 32 minutes.
A Non-Stop Service
This would speed up the service.
With a 125 mph average between London King’s Cross and Leeds.
- 125 mph Base Time – 89 minutes.
- One Acceleration/Deceleration section at 6 minutes each – 6 minutes.
This would mean a total time of 95 minutes.
Uprate that to 140 mph and faster acceleration and deceleration.
- 140 mph Base Time – 80 minutes.
- One Acceleration/Deceleration section at 4 minutes each – 4 minutes.
This would mean a total time of 84 minutes.
Uprate that to 160 mph and faster acceleration and deceleration.
- 160 mph Base Time – 70 minutes.
- One Acceleration/Deceleration section at 4 minutes each – 4 minutes.
This would mean a total time of 74 minutes.
These compare with a proposed time of one hour and 21 minutes on the original plan to High Speed Two.
Conclusion
It looks like a non-stop service between London and Leeds running at 140 mph, with perhaps some sections at perhaps a bit faster, could be able to match the High Speed Two times.
The Anonymous Widower 