NotATrainspott
Established Member
- Joined
- 2 Feb 2013
- Messages
- 3,304
I was very much under the impression Central was pretty easily modified to go back to ~140m? Argyle Street is the really big problem, as the station box just isn't big enough.
That said, enough of the North Clyde Line is problematic (Partick, Hyndland, Jordanhill are all awkward) that I practically expect the first solution there will be to go to 120m fixed-formation units, as there's enough peak-time 3-car (60m) services still, probably with an interior designed similar to the Class 700 to maximise standing room (even with 140m stock I'm pretty sure there would still be plenty of standees on-peak, and off-peak there's plenty of spare seating capacity already).
The Scotland Route Study says the Central low level platforms are capable of 120m long trains while the Queen Street ones are capable of 138m. Since the Study had much discussion about how the Central low level island platform are far too narrow for modern passenger requirements, even if there could be some extensions at either end they'd be even narrower. It's one thing having narrow platform extensions at a terminus where they're unavoidable and likely only to be used by passengers when there's a train waiting. It's quite another having narrow platforms in a tunnel with trains running past and no PEDs.
I think going to a Northern City Line-style metro fixed-formation 120m unit isn't the right answer. The Strathclyde Electrics network is developing away from being a transport system for the Glasgow conurbation and more towards a general regional rail service. We've now got trains running all the way through to Edinburgh, and stops on the inner parts being skipped. The train is better suited for these sorts of regional journeys than it is for short hops. The Glasgow Metro proposals provide a great way for this split to continue. The Metro could handle the bulk of passenger demand within the built-up area, leaving the train for passengers further out. This could well avoid the need for any expensive infrastructure changes, like rebuilding Hyndland junction.
I think I went over the available platform lengths at key stations before without finding any major issues. Hyndland should be straightforward to lengthen at the northern end. Jordanhill looks it could handle SDO. Partick and other stations can probably be done by flattening out the ramp section at the end of the platforms, as is modern safety practice.