Would platform screen doors be feasible?
Curious, I know BART won't do this in the foreseable future, but would platform screen doors be feasible anywhere on the BART system? I could see them installed at the stations in Downtown SF which get pretty crowded during Rush Hour. Or has the amount of people riding BART at Rush Hour not reached the level where it would require this?
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This would just be one more
This would just be one more thing to break down and cause delays. Plus, a lot of trains don't stop where they're supposed to.
Not practical. BART will
Not practical. BART will transition to a 3 door car in its next generation of rolling stock. Configuring stations would be cost prohibitive. Only the newest systems such as JFK's Plane to Train or Paris Metro Line 14 would this be possible.
It would probably be
It would probably be determined necessary to prevent the train from moving every time one of the platform doors malfunctioned. This would include preventing a train from entering a station during this situation since the main purpose of the doors would be to prevent people from falling or jumping in front of the train.
Plan on twice as many occasions for the train to not move because of a "door problem" that would need to be troubleshot and remedied before the train could move.
This comes under the engineering classification of "can you make it idiot proof?" for which there are way more idiots than viable solutions.
The reason platform screens
The reason platform screens are used in other transit systems, such as Paris Line 14 and JFK's Air Train, is that they are DRIVERLESS systems, and don't have a conductor hanging their head out the window, like BART does. They would be a redundant system on BART, unless it suddenly goes fully automated.
There are lines with drivers
There are lines with drivers that have platform doors too--for example, I'm thinking of the Jubilee Line Extension (JLX) in London.