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Question:

When approaching a railroad crossing, you should activate your hazard lights about ________ before the crossing.

A
Explaination

When your bus is within 200 feet of a railroad crossing, your hazard lights must be turned on to make your intentions clear to other road users. (Note: In some states, you may have to activate your hazard lights even farther from the crossing under certain conditions. Consult your state's CDL manual for details.)