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I think the first actually does happen already, if only at a smaller scale. I know overground has some stations where the last car can't fit on the platform. (

by bostik 11y ago

I think the first actually does happen already, if only at a smaller scale. I know overground has some stations where the last car can't fit on the platform. (Circle line might have couple of these too, if I remember correctly.) And I've noticed that a couple of fairly central stations have been closed for more than a year due to construction works. So extending platforms a couple of stations at a time should be possible - one fully closed and another with just one end blocked off. It would take ages and insane amounts of money to do that for the entire line, you're right about that. But maybe just for the stations where it would provide the biggest benefit?

Symbiote 11y ago
It massively shows down alighting time, the "dwell time" is already a big factor in how many tube trains can be run. It's also very confusing to passengers. For both reasons, TfL would be extremely reluctant to introduce it at a central London station. And, there are building foundations and other tunnels in the way in many cases, so it wouldn't be a temporary inconvenience.
quarterto 11y ago
Of the deep level lines, only the Northern line has selective door opening IIRC. It's in use at stations like Moorgate and Embankment that are already so riddled with tunnels that extending the platform is just plain impossible.