Comment Re:Autopilot? (Score 1) 393
I must be missing something.
Aircraft operate in 3 dimensions, trains operate for the most part in one - which implies that there is much less of a chance of 2 planes being at the same place at the same time than 2 trains being at the same place a t the same time. The airplane autopilot flies at certain altitudes depending on the path, and if the plane stays at the assigned altitude, there is almost no chance for crossing paths. Trains going in different directions share tracks in a lot of places, and they can't move out of the way of each other - timing is everything in train safety (hence we have a few time zones rather than hundreds of local times)