IMHO having computer controlled car sets would make this easy to implement.
Unfortunately, at least here in Seattle, I don't believe unionized drivers would give up the controls, knowing management would want to pay them less for working in a less dangerous environment. So goes the world. On Feb 24, 2013, at 20:05 , Bob Sullivan wrote: > Not to difficult if all the cars run on the line, old and new, have > the same length and > doors in the same place on the car. It's a matter of physical dimensions > on the capital equipment you already own. > > On Sun, Feb 24, 2013 at 10:26 AM, Bob W <[email protected]> wrote: >>> 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 Joseph McAllister [email protected] “If I could tell the story in words, I wouldn’t need to lug a camera.” –Lewis Hine -- 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.
