When approaching a railroad crossing, activate your hazard lights _________.

Approaching the Crossing: Slow down, including shifting to a lower gear in a manual transmission bus, and test your brakes.
Activate hazard lights approximately 200 feet before the crossing. Make sure your intentions are known.
Scan your surroundings and check for traffic behind you.
Stay to the right of the roadway if possible.
Choose an escape route in the event of a brake failure or problems behind you.