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 use in order to improve visibility?

High beams
Parking lights
Headlights
Fog lights

The correct answer is: Headlights

When driving in fog, it is important to use your headlights to improve visibility. This is because fog lights are specifically designed to cut through fog and reduce glare, making it easier to see the road ahead. High beams and parking lights are not recommended in fog because high beams can reflect back and cause even worse visibility and parking lights are not bright enough to properly light the road.