What should you do if you need to make an unplanned, sudden stop in traffic due to a hazard ahead?
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Correct!
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Correct answer to question 330 (General Knowledge): Brake firmly and, if there is time, flash your brake lights to alert traffic behind you
Why
Braking firmly and using your brake lights to warn following traffic communicates the stop as clearly as possible, since a truck's size makes an unexpected stop especially risky for vehicles behind you.
Updated: November 2026