Comment Re:Anyone know who operates airport subways? (Score 1) 91
Those trams and subways amount to not much more than sideways elevators. I'm guessing that someone monitors these things at large airports/etc just like someone monitors that the elevators are going. But otherwise they are easily automated because they are on rails, their paths are exclusive, secure and well controlled. There are generally double doors so no one can get in/out when they shouldn't, etc...