4 ms·

Strange because the DLR is almost completely automated (no driver, but ticket inspector closes the doors) and has no platform edge doors. But they do have emerg

Strange because the DLR is almost completely automated (no driver, but ticket inspector closes the doors) and has no platform edge doors. But they do have emergency stop buttons on the platforms.

fredoralive 10y ago
AFAIK It's the lack of a human making the close doors / start moving decision that leads to a need for platform doors. (The Central, Jubilee, Northern and Victoria lines also use automatic operation to similar levels as the DLR, it's just less obvious as the train operator still has a separate cab).
- masklinn 10y ago
  > AFAIK It's the lack of a human making the close doors / start moving decision that leads to need for platform doors. There is no such need. Lyon's line D has been running fully automatic since 1992 without platform doors[0], the only major accident has been a drunk falling on the train having jumped from a mezzanine. [0] https://www.youtube.com/watch?v=ubdJ35NBrbE https://www.youtube.com/watch?v=ubdJ35NBrbE
  - thomaspurchas 10y ago
    Same in Copenhagen[0], but they do appear to have LIDAR units monitoring the track edge at stations without doors. [0] https://youtu.be/R8QvM000uyE?t=151 https://youtu.be/R8QvM000uyE?t=151
    - Symbiote 10y ago
      Copenhagen has since fitted platform edge doors to all stations, above and below ground.
  - nattofriends 10y ago
    Of course there is no such technical _need_, most kinds of these needs are driven by _legal_ requirements founded in fear of full automation. Fully automated systems were realized before your example already in Vancouver's SkyTrain (1986) and even BART was supposed to be specified to be fully automatic.
philjohn 10y ago
Small correction - they can also be driven manually, a flip up panel on the front seat allows the conductor to take control in the case of a complete (or widespread) signalling failure. They're restricted to 12mph though as there are no signals at all and everything must be done by sight.
- peteretep 10y ago
  > allows the conductor to take control in the case of a > complete (or widespread) signalling failure Or, having ridden that line as part of a regular commute, whenever the conductor gets bored.
  - thomaspurchas 10y ago
    I don't think they actually get to drive the train then, just get the press the close door button on the panel. The train still drives to the next station without any human input. Most automatic trains can't be driven by humans under normal circumstances because signaling information is fed to the train far faster than any human could react to it.

Strange because the DLR is almost completely automated (no driver, but ticket inspector closes the doors) and has no platform edge doors. But they do have emergency stop buttons on the platforms.

fredoralive 10y ago

AFAIK It's the lack of a human making the close doors / start moving decision that leads to a need for platform doors. (The Central, Jubilee, Northern and Victoria lines also use automatic operation to similar levels as the DLR, it's just less obvious as the train operator still has a separate cab).

masklinn 10y ago
> AFAIK It's the lack of a human making the close doors / start moving decision that leads to need for platform doors. There is no such need. Lyon's line D has been running fully automatic since 1992 without platform doors[0], the only major accident has been a drunk falling on the train having jumped from a mezzanine. [0] https://www.youtube.com/watch?v=ubdJ35NBrbE https://www.youtube.com/watch?v=ubdJ35NBrbE
- thomaspurchas 10y ago
  Same in Copenhagen[0], but they do appear to have LIDAR units monitoring the track edge at stations without doors. [0] https://youtu.be/R8QvM000uyE?t=151 https://youtu.be/R8QvM000uyE?t=151
  - Symbiote 10y ago
    Copenhagen has since fitted platform edge doors to all stations, above and below ground.
- nattofriends 10y ago
  Of course there is no such technical _need_, most kinds of these needs are driven by _legal_ requirements founded in fear of full automation. Fully automated systems were realized before your example already in Vancouver's SkyTrain (1986) and even BART was supposed to be specified to be fully automatic.

philjohn 10y ago

Small correction - they can also be driven manually, a flip up panel on the front seat allows the conductor to take control in the case of a complete (or widespread) signalling failure. They're restricted to 12mph though as there are no signals at all and everything must be done by sight.

peteretep 10y ago
> allows the conductor to take control in the case of a > complete (or widespread) signalling failure Or, having ridden that line as part of a regular commute, whenever the conductor gets bored.
- thomaspurchas 10y ago
  I don't think they actually get to drive the train then, just get the press the close door button on the panel. The train still drives to the next station without any human input. Most automatic trains can't be driven by humans under normal circumstances because signaling information is fed to the train far faster than any human could react to it.