haha

So, now that I've had more time with the game, I found out that AI doesn't actually look at the signals and their color, which is unfortunate and a serious flaw in the game's design, in my opinion. Instead, the AI pulls "some data" about the zone that the signal is supposed to be monitoring and if there's anything in that zone, it will stop short of the signal. However, it doesn't work if the zone being monitored is behind the signal. For example, if you have a train on a siding and you want a signal at the end of the siding to monitor the main line so that the siding train doesn't re-enter the main line while it's occupied, it won't work. The signal zone will APPEAR to be monitoring the main line, and the signal WILL turn red if the main line is occupied, but the train on the siding will ignore the red and collide with the other train.

Hey @Michael Sakowich, You have to press the Q hotkey on your keyboard (Q = Track Options) and look at the upper right corner of the menu, there should be a button called "New". Click it and go to the second page of the menu, click "bridge" and viola!

You might be playing an older version