4 ms·

Are you sure? Have you ever risked not pressing the door open button on the train?

• Kenji 11y ago
  Yes. The results I described have all actually happened.
• metasean 11y ago
  My experience is the same. If I don't press the open door button on the train then the door doesn't open; if I press the button, then the door opens. One of my train start locations is at the end of the line. The train idles there for 10-15 minutes and because of supposed placebo buttons I've actually used this time to experiment and see if the doors will trigger based on anything other than the button and they do not. In the same vain, I'm sure there are city intersections that always trigger regardless of pressing the button, but when I've had the time, I've waited patiently through up to three full rotations of intersection lights without getting a pedestrian crossing in either direction. But, lo-and-behold, when I finally press the button, I'll get the pedestrian light in my direction and the the other one still doesn't trigger.
  • aidos 11y ago
    I used to take the train everyday out of London (SW trains). As an optimisation geek I wanted to know the fastest way to get the doors open at the station. If you just keep the button held down from before you arrive into the station the door will open as soon as the conductor flips the switch. Though there's a weird awkward social thing, because you know the people behind you are staring at you thinking "take your finger off and push it again and the doors will open, idiot!" I go through pedestrian crossings regularly when you absolutely need to push the button or they never trigger. You can tell if someone hasn't been through for a while because the crossing changes straight away.