Just remember to signal properly
Signals are illustrated by an "o" for short sounds and "=" for longer sounds.
Succession of short sounds.....Used when an emergency exists, or persons or livestock are on the track. When crews on other trains hear this signal, they must stop until it is safe to proceed.
= When train is stopped. The air brakes are applied and pressure is equalized.
= = Train releases brakes and proceeds.
o o Acknowledgment of any signal not otherwise provided for.
o o o When train is stopped: means backing up, or acknowledgment of a hand signal to back up.
o o o o A request for a signal to be given or repeated if not understood.
= o o o Instruction for flagman to protect rear of train.
= = = = The flagman may return from west or south.
= = = = = The flagman may return from east or north.
= = o = Train is approaching public crossings at grade with engine in front. Signal starts not less than one quarter mile before reaching the crossing, if distance permits. If distance does not permit, signal starts soon enough before the crossing to provide warning. Signal is prolonged or repeated until the engine occupies the crossing. This signal is used to warn employees when the view is restricted.
o = Inspect the brake system for leaks or sticking brakes.
I NEED a set! Just the air coming out of those will blow 'em off the road. 
they do sound pretty good.
