After playing one scenario on Raton Pass, (just got it today) I've noticed 2 problems with the signals. When you are far away from them the light flickers, it doesn't matter what aspect the signal is showing, it makes it hard to tell what the aspect is. Second, the signal turns red before it should as you pass it, you see it turn red a second or two, in real life signals don't turn red for at least 5-10 seconds when a locomotive passes the signal. Overall the route seems well done.
The Signal turning to Red would be caused by the positioning of the Signal Markers being the wrong side of the signal. The flickering of the signals might be due to low frame rates? Peter