• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Express Escalator

    January 9th, 2013
    ideas  [html]
    Consider a case where you have long escalators, with at least one spare. This example, Porter Square in Cambridge MA, has three escalators in parallel:

    While in general we probably run escalators at a good speed-safety tradeoff, considering the variety of people riding them, when you have two you ought to be able to run one faster and one slower and do better. You'd need to put up clear signs so people could choose which one to take, and you'd need to make sure that traffic patterns weren't going to push people onto the fast escalator when it's not good for them.

    Looking at escalator safety, it doesn't sound like people falling over when getting on or off is a problem. Instead people get hurt when their clothing gets caught, escalators catch fire, or people ride on the railings and fall off.

    A bit of looking suggests ASME A17.1 specifies escalator speeds:

    6.1.4.1 Limits of Speed. The rated speed shall be not more than 0.5 m/s (100 ft/min), measured along the centerline of the steps in the direction of travel.
    How fast is that maximum (1.1mph) compared to normal escalators? Has anyone done experiments on the maximum safe escalator entrance and exit velocities?

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    More on the Deutschlandtakt

    The Deutschlandtakt plans are out now. They cover investment through 2040, but even beforehand, there’s a plan for something like a national integrated timetable by 2030, with trains connecting the major cities every 30 minutes rather than hourly. But the…

    via Pedestrian Observations July 1, 2020

    How do cars fare in crash tests they're not specifically optimized for?

    Any time you have a benchmark that gets taken seriously, some people will start gaming the benchmark. Some famous examples in computing are the CPU benchmark specfp and video game benchmarks. With specfp, Sun managed to increase its score on 179.art (a su…

    via Posts on Dan Luu June 30, 2020

    Quick note on the name of this blog

    When I was 21 a friend introduced me to a volume of poems by the 14th-century Persian poet Hafiz, translated by Daniel Ladinsky. I loved them, and eventually named this blog for one of my favorite ones. At some point I read more and found that Ladinsky’s …

    via The whole sky June 21, 2020

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact