The engineering that allows articulated buses to bend

(theautopian.com)

32 points | by CharlesW 19 hours ago

4 comments

  • adrianmonk 0 minutes ago
    When I got to where they explained the benefits of having the engine at the very back and the instability of having the back part push the front, I tried to guess how they solved it. I guessed a fancy drive shaft with universal joints so the engine in the back half could drive wheels in the front half.

    I guessed wrong. I still like my idea, but their solution is simpler and probably more efficient and more durable too.

  • happytoexplain 1 hour ago
    I like watching the other half of the bus while riding these. It's a cool effect, seeing the whole "room" oscillate through the "doorway", while I feel like I'm standing still.

    Edit: The article has a video of this effect near the bottom.

    • havnagiggle 49 minutes ago
      The trains around Munich, Germany were fantastic for that effect. 15+ cars long with wide, open pivots.
      • Lio 45 minutes ago
        Yep I find the Elizabeth Line in London has this effect too.

        I find it a bit freaky to be honest but you do get used to it.

      • Aachen 40 minutes ago
        Most metros are like this no? Not much seating, just articulated open tubes(-in-tubes)
    • ortusdux 26 minutes ago
      My college years did not include all that many hangovers, but I distinctly remember not enjoying this effect one morning.
    • delecti 24 minutes ago
      One silver lining to the bus being packed is standing with one foot on either side of the articulation pivot. Feeling your stance change under you while you're standing still is neat.
  • Reason077 48 minutes ago
    > “The articulated bus is a common sight everywhere”

    Certainly not in London where they were famously banned in 2009.

    Now days they’re uncommon throughout the UK, with UK cities having a preference for double-deckers. You do see them in use as shuttles at some UK airports, though.

    • thinkingemote 19 minutes ago
      "bendy-buses" are only really effective when passengers can enter at any entrance. Mostly the block is waiting time and thats dependent on people getting on the bus. Allowing people to get on the long bus at any of the doors. Usually bendy buses are worse than a normal single or double deckers. Passengers have to scuttle down the whole length to let more people on. They will only move so far naturally, and if they can move it takes longer for passengers to move down. Most standing passengers stand at the front, so the bus will never get to capacity. They stand in narrow aisles between seats.

      https://en.wikipedia.org/wiki/Articulated_buses_in_London

      In London they allowed people to enter at any door and it seems like there was concern about fare evasion, leading to a reason to cancel it.

    • hagbard_c 14 minutes ago
      Why were they banned? They're used in the Netherlands which is rife with small bendy streets so if that was the argument it seems to be somewhat spurious.
  • bell-cot 48 minutes ago
    Call me a fossil, but double-decker busses just seem so much cooler. Without all the added engineering complexity, costs, and footprint.
    • Aachen 41 minutes ago
      Boarding times though? I agree of course about the cool factor and I was sure to ride one when visiting London, but afaik the slower (dis)embarking times are why double-decked trains are primarily used on intercity trains and not on commuter/local trains or light rail (metro etc.). Typical busses stopping every two minutes are probably similar

      Edit: wait, I know one in Germany as well. It's expensive but between Frankfurt airport and another major city, there is a rail line but somehow the bus is significantly faster and they're using double deckers. The front row at the top was, n=3, always free for me (all four seats) so you get a quite unique experience, at least so far as my bus experiences in mainland western Europe go :)

      • bell-cot 7 minutes ago
        > Boarding times though?

        Often true. OTOH, the reduced footprint (vs. either 1 articulated or 2 normal busses) can speeds things up, especially on cramped and congested city streets. And if you're getting near gridlock-level congestion, the length of the articulated busses can be like dumping gravel into your system's gearbox.

      • dominotw 25 minutes ago
        > Boarding times though?

        cant they just put another entry door?

    • hagbard_c 11 minutes ago
      How about articulated double-decker buses? The one does not need to exclude the other after all. It'd need a large harmonica to deal with hills and bumps or it could have separated top floors with sloping roofs.