• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Compounding Subway Crowding

    October 18th, 2012
    transit
    The more time that passes without a train leaving, the more people are waiting to take it when it shows up. The more people that try to get on a train, the longer it takes at a station. This is not a good combination: once a train starts being late passengers build up, so it gets even later and even more people are at upcoming stations.

    The driver has little they can do but promise [1] a less crowded ride to people willing to wait:

    The doors are closing. There is another train directly behind us. I repeat, the doors are closing.
    How could the trains be set up to avoid this? One awkward idea would be add a second barrier, where the train keeps track of roughly how many people are onboard and only allows onto the platform a number of people proportional to the amount of available space. Where the capacity of the train is the number of people it can hold without getting slow. Another possibility would be to have trains announce that they're skipping some stops and run express when they get behind. Is there anything other cities have done that works?


    [1] It's an interesting promise: as far as I know train drivers don't know where other trains are. But if a train gets slowed other trains usually get bunched up behind it. Passengers mostly don't trust the announcement, however, because (a) the driver doesn't know for sure there's a following train and (b) they know the drivers are mostly willing to say what it takes to get the doors closed and the train moving.

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    Moral aesthetics

    “Doing good” differs by subculture The post Moral aesthetics appeared first on Otherwise.

    via Otherwise September 29, 2022

    Futurist prediction methods and accuracy

    I've been reading a lot of predictions from people who are looking to understand what problems humanity will face 10-50 years out (and sometimes longer) in order to work in areas that will be instrumental for the future and wondering how accurate thes…

    via Posts on September 12, 2022

    On the Beach

    I really like going in the water and this beach is a great place for building sand castles and boogie boarding. I also like trying to float on top of big waves. I'm not very good at it. I only float on the flat waves.

    via Anna Wise's Blog Posts July 12, 2022

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact