CDL · Night and weather

You are driving a commercial vehicle on the highway when the fog becomes so dense that you can see only a short distance ahead. What is the safest decision?

Correct answer: Pull off at a rest area or truck stop and wait for better visibility.

Answer options

  1. APull off at a rest area or truck stop and wait for better visibility Correct
  2. BFollow closely behind the taillights ahead so you can stay on the road
  3. CStop in your travel lane with your hazard flashers on until the fog lifts
  4. DKeep your normal speed, since fog tends to thin out once you are in it

Why

The best way to deal with dense fog is to avoid driving in it, so get off the road at a rest area or truck stop and wait until you can see well again. Fog does not reliably thin out once you are in it, taillights ahead may belong to a vehicle that has already left the road, and a vehicle stopped in a travel lane is likely to be hit from behind.

About this question

Topic: Night and weather   License: CDL

Part of these practice sets:

Where it applies: Asked in every state.

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This question is part of Night and Fog Driving (14 questions). Take the full set and check your score.

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