When operating a commercial vehicle that must pull off the road and stop, the use of emergency flashers is:

Question

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When a commercial vehicle must pull off the road and stop, the use of emergency flashers is required in all states. This is different than the laws concerning the use of flashers while driving slowly. Commercial vehicles that are stopped on the side of the road must use emergency flashers to warn other drivers. This is especially important during the hours of darkness or during inclement weather such as rain or fog.

When Operating a Commercial Vehicle That Must Pull Off the Road