Riding The SL8 Bus Between Shepherd’s Bush Market And Uxbridge Stations – 16th July 2023
This draft map from TfL illustrates the concept of the Superloop.
The spoke on the Western side of the map is route SL8 between White City and Uxbridge stations.
This morning I rode the route between Shepherd’s Bush Market and Uxbridge stations and took these pictures.
Note.
- Some of the buses have still to be painted in the new white-topped Superloop livery.
- The buses are diesel-powered.
- The stops have their own livery.
- I estimate the route is 12.3 miles long and the bus took 67 minutes.
- The frequency appeared to be typically four buses per hour.
- The route is mainly dual-carriageway to the West of Ealing Hospital.
Route SL8 used to be route 607 and except for the branding nothing has changed.
I have few thoughts.
The Concept
The concept seemed to work well, where the roads were free of traffic.
But we get get a bit delayed through places like Ealing Broadway, where parking reduced the width of the road.
The Route
The route connects quite a few stations and other important locations.
From East to West they include.
- Westfield Shopping Centre
- Shepherd’s Bush station for the Central Line and the Overground.
- Shepherd’s Bush Market station for the Hammersmith and City Line
- Acton Central station for the Overground
- Ealing Common station for the District and Piccadilly Lines.
- Ealing Broadway station for the Central, District and Elizabeth Lines.
- Ealing Broadway
- Ealing Town Hall
- Ealing Hospital
- Southall Broadway
- Hayes
Note.
- The route is very much the same as the now-abandoned West London Tram, which was proposed twenty years ago.
- The tram was opposed y the three London boroughs on the route, as it cut them in half. But buses don’t cause the same problems.
- The Superloop map shows that the SL8 bus calls at Hayes and Harlington station, but we went nowhere near it today.
- The route with its sections of dual carriageway and congested shopping streets was a bit like the route o Birmingham’s hydrogen buses, that I wrote about in Riding Birmingham’s New Hydrogen-Powered Buses.
I feel as the route is very similar to the West London Tram, which was probably extensively researched, that there won’t be too many changes to this route.
Parking Along The Route
I wouldn’t be surprised to see more parking restrictions along the route, to speed up the buses in the crowded shopping streets like Acton, Ealing Broadway and Southall Broadway.
The Buses
The buses are Egyptian-built eVoSeti diesel buses, which use a Volvo chassis.
- I don’t like these buses as they don’t have a flat floor and I’ve seen some passengers struggling with the stairs on the lower deck.
- At least the stairs to the upper deck aren’t too bad.
We used to have them locally in Dalston and I used to avoid them, if there was another bus close behind.
This new route, though should be served by zero-carbon buses, so that pollution and carbon emissions are reduced.
- Between White City and Uxbridge takes over an hour.
- A battery-electric bus would need recharging during the day.
- It looks like there’s not much space at White City and Uxbridge stations, to install charging stations.
- A hydrogen-powered bus could probably manage all day on one filling.
For these reasons, I suspect that hydrogen buses would be the preferred option.
Moving The West London Line AC/DC Switchover To Shepherd’s Bush
London has a rail capacity problem, for both freight and passenger trains.
This report from Network Rail is entitled The London Rail Freight Strategy (LRFS).
One of the recommendations of the report is to move the switchover between AC and DC power on the West London Line to Shepherd’s Bush station. It says this about the switchover.
Extension of the overhead wires further along the WLL, to provide AC electrification as far south as Shepherd’s Bush station.
Two passenger train services run along the West London Line.
- Four tph – London Overground – Clapham Junction and Stratford
- One tph – Southern – Clapham Junction and Milton Keynes
Note.
- tph is trains per hour.
- London Overground would like to increase their service to six tph.
- All trains stop at Shepherd’s Bush station.
The West London Line (WLL) runs between Willesden Junction station in the North and Clapham Junction station in the South.
These are the stations and their electrification status.
- Willesden Junction – 25 KVAC Overhead Electrification
- Shepherd’s Bush – 750 VDC Third-Rail Electrification
- Kensington Olympia – 750 VDC Third-Rail Electrification
- West Brompton – 750 VDC Third-Rail Electrification
- Imperial Wharf – 750 VDC Third-Rail Electrification
The switchover is performed North of Shepherd’s Bush station with the train moving.
These pictures show the electrification to the North of Shepherd’s Bush station.
This double-electrification allows switchover, whilst the trains are moving.
This is said in the Network Rail document about moving the West London Line AC/DC switchover to Shepherd’s Bush station.
Extending the Overhead Line Equipment south to Shepherd’s Bush would enable passenger trains to change traction source whilst making their scheduled station stop.
A slight extension to dwell times at Shepherd’s Bush may be required, but the elimination of the need to slow down or, especially, to stop, as is the case for GTR trains, at North Pole Junction would release a significant amount of capacity.
Recent work carried out on behalf of Transport for London calculated that the relocation of the changeover to the Shepherd’s Bush could provide an indicative net saving of 7 minutes per hour, which is equivalent to an additional path and some additional time for timetable flexibility.
The LRFS capacity analysis concluded that this intervention could potentially release up to two additional timetable paths an hour in each direction.
Moreover, the analysis advised that eliminating the need for GTR services to stop to change traction at North Pole Junction would be of significant performance benefit even today.
This sounds to me like this us a good solution, that will give winners all round.
- I went North yesterday on a GTR (Southern) service and can confirm, the stop to switch voltage at North Pole junction.
- Extra paths are always good news.
- I have a feeling that the overhead electrification on the route isn’t the best, so Network Rail may even have to replace it anyway.
What I like about the proposal, is that if the switchover point is moved to Shepherd’s Bush station and in the very rare occurence of a switchover failure, the passengers can be easily evacuated from the train as it will most likely be in Shepherd’s Bush station, rather than in the industrial wastelands of West London.
These pictures show Shepherd’s Bush station.
Note.
- It looks like the bridges have been built high enough for overhead electrification.
- The platforms appear to be able to handle long trains.
- Putting up overhead gantries doesn’t look to be the most challenging of tasks.
I don’t think, that the engineering needed will be difficult and because of the gains outlined in the report, this project should be performed as soon as possible.
Should The AC/DC Switchover Be At Kensington Olympia Station?
The Network Rail document also muses about performing the AC/DC switchover at Kensington Olympia station.
This is said.
Although moving the changeover to Shepherd’s Bush would eliminate the need for passenger trains to slow down or stop at North Pole Junction, electrically hauled freight trains will still need to switch power supply modes whilst moving, wherever the AC/DC interface is located.
Due to the substantial incline facing trains running northward on the WLL, which increases in severity towards the Willesden end of the route, it would be preferable for the changeover to be made as far south as possible. This would enable freight trains to slow down to switch traction before reaching the worst of the gradient, giving them a much better chance of regaining line speed once drawing power from the OLE.
Although Kensington Olympia is less than a mile to the south of Shepherd’s Bush, the intervening route section is almost entirely level, with the incline commencing just before Shepherd’s Bush station and continuing to rise sharply along the rest of the WLL. The capacity and performance benefits of relocating the changeover are therefore likely to be greater if the overhead wires are extended to Kensington Olympia, removing the risk to traffic flow that would remain if freight trains were forced to switch whilst running uphill.
This would prepare the West London Line for the transition to electric freight that will be necessary as part of the decarbonisation of the railway over the next thirty years.
Resolving the current traction changeover issues for freight as well as passenger trains would support this transition by encouraging freight operators to invest in electric locomotives to run on the orbital routes, in the confidence that this constraint has been addressed.
Network Rail seem to have made a very strong case for switching between AC and DC power at Kensington Olympia station.
These Google Map shows Kensington Olympia station.
And these pictures show the station on a very wet day.
It doesn’t appear that there would be too many problems in electrifying Kensington Olympia station.
The only problem, may be the bridge at Addison Gardens to the North of Kensington Olympia station.
Although, Network Rail have an extensive range of tricks to get the wires through.
Conclusion
I believe, as probably do Network Rail, that Kensington Olympia station should be the station, where the switchover occurs.
But it’s all down to money.
It does seem to me, that the London Rail Freight Strategy is the first serious attempt to work out, the possible freight and passenger uses of the West London Line, which is one of those rail lines that has been designed by Topsy and accidents of history.
How many other rail routes in the UK, would be improved by a similar analysis?
Related Posts
These are related posts about the London Rail Freight Strategy (LRFS).
Decarbonisation Of London’s Freight Routes
East Coast Main Line South Bi-Directional Capability
Gauge Improvements Across London
Headway Reductions On The Gospel Oak To Barking, North London and West London Lines
Heavy Axle Weight Restrictions
Kensal Green Junction Improvement
Longhedge Junction Speed Increases
Moving The West London Line AC/DC Switchover To Kensington Olympia
Stratford Regulating Point Extension
Will Camden Road Station Get A Third Platform?
Will Clapham Junction Station Get A Platform 0?
The Anonymous Widower 