California Driver License (DMV) Written Practice Test

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Ace your California DMV written test! Prepare for the exam by practicing hundreds of multiple-choice questions covering traffic laws and road signs. Boost your knowledge, gain confidence, and increase your chances of passing the test on your first try.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

When driving in fog, what should you do?

Use your high beams.
Increase your speed.
Drive in the right lane.
Use your low beams and reduce your speed.

The correct answer is: Use your low beams and reduce your speed.

Driving in fog reduces visibility, which can cause accidents. Using high beams can create glare and reduce your visibility even further. Increasing your speed can also lead to accidents as you may not be able to see obstacles or other vehicles in time to react. Driving in the right lane is not a universal solution as it may be safer to drive in the left lane if the fog is heavier on the right side. Using low beams and reducing your speed allows you to maintain your visibility and have more time to react to any hazards on the road. It also helps prevent glare and reduce the risk of collisions. Therefore, the best option when driving in fog is to use your low beams and reduce your speed.