3 ms·

To be fair, London has looked at the platform screen doors thing a few times too and dismissed it as unaffordable. New lines get PSDs but there doesn’t seem to

To be fair, London has looked at the platform screen doors thing a few times too and dismissed it as unaffordable. New lines get PSDs but there doesn’t seem to be a realistic prospect of retrofitting existing ones any time soon.

steveBK123 3y ago
And yet NYC having built only a handful of stations in the last 40 years, couldn't be bothered to include them even there.
- f33d5173 3y ago
  I imagine the difficulty would be in ensuring that the train lines up exactly with the doors. In that cade, retrofitting would need to apply to the train and control system, not just the platform itself.
  - steveBK123 3y ago
    There in lies the rub. Doing things is always harder than not doing things. Agreed. They built a new line on second Ave with cavernous station mezzanines and couldn’t be bothered with doors there either. Track, signals, trains were all new.
  - devb 3y ago
    That's not the issue. Union Square on the Park Avenue line and the old South Ferry on the 7th Avenue line both had platform "gap fillers" installed decades ago that require the train to stop at an exact location each and every time: https://www.atlasobscura.com/places/14th-street-union-square-moving-platforms https://www.atlasobscura.com/places/14th-street-union-square... Every station has lining boards that the conductor must check before opening the doors to ensure that the entire train is stopped along the platform: https://www.topic.com/conduct-yourself https://www.topic.com/conduct-yourself
    - Reason077 3y ago
      London's Jubilee line extension had platform doors since it was opened in December 1999, but the upgrade to automatic train operation wasn't completed until 2011. So for a long time, drivers had to manually stop the train at alignment points. This did cause occasional delays and problems, but it wasn't unworkable. As a passenger you did sometimes notice that the train doors weren't aligned perfectly with the platform doors. Now days, of course, it stops perfectly every time.

steveBK123 3y ago

And yet NYC having built only a handful of stations in the last 40 years, couldn't be bothered to include them even there.

f33d5173 3y ago
I imagine the difficulty would be in ensuring that the train lines up exactly with the doors. In that cade, retrofitting would need to apply to the train and control system, not just the platform itself.
- steveBK123 3y ago
  There in lies the rub. Doing things is always harder than not doing things. Agreed. They built a new line on second Ave with cavernous station mezzanines and couldn’t be bothered with doors there either. Track, signals, trains were all new.
- devb 3y ago
  That's not the issue. Union Square on the Park Avenue line and the old South Ferry on the 7th Avenue line both had platform "gap fillers" installed decades ago that require the train to stop at an exact location each and every time: https://www.atlasobscura.com/places/14th-street-union-square-moving-platforms https://www.atlasobscura.com/places/14th-street-union-square... Every station has lining boards that the conductor must check before opening the doors to ensure that the entire train is stopped along the platform: https://www.topic.com/conduct-yourself https://www.topic.com/conduct-yourself
  - Reason077 3y ago
    London's Jubilee line extension had platform doors since it was opened in December 1999, but the upgrade to automatic train operation wasn't completed until 2011. So for a long time, drivers had to manually stop the train at alignment points. This did cause occasional delays and problems, but it wasn't unworkable. As a passenger you did sometimes notice that the train doors weren't aligned perfectly with the platform doors. Now days, of course, it stops perfectly every time.