Audio/video in the cab of an engine sounds great on the surface but when you are working off of short calls in the middle of the night and your train is just not moving people need to be able to nap. Make the system motion or radio activated and keep the company's hands off unless there is an event that needs the information.

A daylight job running a passenger train is one thing. 24/7 running freight trains needs a different approach and both Class A railroads are sadly lacking in their fatigue management programs. You can only whip people awake for so long.