05-07-2017, 06:06 PM
LOS is Line of Sight, correct (essentially "unsignalled" operation). ATC (safety/in-cab signaling) isn't ATO ("driverless") in this context, as far as I'm aware... though I've actually heard discussions both ways, but in my experience ATC is just cab signaling; the driver still controls the speed. Even if it was ATO, with the driver simply closing the doors which would initiate movement automatically to the next station, one might argue that that's exactly why there must be barriers.