> From: PDML [mailto:[email protected]] On Behalf Of John Sessoms [...] > > > > I saw on TV recently a shot of a subway station somewhere where they > > had fully enclosed the platform with doors that match up with where > > the train stops (imagine like a horizontal elevator). May have been > > the series about great cities hosted by Gryff Rhys Jones. Something > > tells me it was Tokyo but I'm not sure. > > > > It made me wonder why other cities haven't done this. > > > > Cheers, > > Dave > > The subways in Hong Kong and Beijing both had those kind of barriers. I > can't remember if Nanjing had them or not, but I think they did. > > It would probably be *very* expensive to retro-fit them to existing > systems. You not only have to install the door mechanism, but find some > way to make the trains stop in exactly the right spot every time so > they line up with the doors.
I don't think it would be particularly difficult. The trains have to stop in more or less the same place anyway, and regulars get to know where the doors are. When they built the Jubilee Line extension here a few years ago they put platform doors on at the new stations, but the old stations still don't have them, so there is a mixture on the one line. For a few weeks after the new ones opened there was the occasional delay while they lined the trains up, but that was just teething trouble, presumably until they got the tolerances right and all the drivers fully trained. It's far more convenient than having unpredictable delays and line closures because some selfish sod has thrown themself in front of a train. B -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
