I never understand the obsession with making it suitable for 5car trains, not 6car. Especially as the rumours are that Project Churchward (or whatever the class 158, 165, 166 diesel unit replacement is now called) is likely to be 3car suburban units and 5car regional units. The last I heard was going to be no 2car units.
So if the suburban trains are going to be 3car, or multiples (6, 9 etc) why make the platforms 5car.
My understanding is that stations like Parson Street & Bedminster were rebuilt in 1930s with platforms over 200m long (although part is now not used) so why have some platforms only about 125m long, not nearer 145m
Totally agree with this if it restricts 6-car operation in the future.
However, new units are very likely to have
SDO▸ fitted and so therefore as long as six cars can be operated in the future using that I’m not so concerned.
It would also be very useful to have passive provision for extension to six (or even nine) carriages built into the design of Pill and Portishead.
In both cases that does mean making sure platform furniture and starting signals are positioned in a way that doesn’t affect those things from happening.
I can’t imagine Portishead will have a starting signal and the only signals on the branch will be those protecting the route back onto the main line.