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.

What should you do before entering a lane of traffic?

Check your rearview mirror
Look over your shoulder
Tap your brakes
Signal then merge

The correct answer is: Signal then merge

Before entering a lane of traffic, it is important to signal then merge. This alerts other drivers of your intention to change lanes and gives them time to adjust their speed if necessary. Checking your rearview mirror and looking over your shoulder are also important precautions to take before changing lanes, but they are typically done after signaling and before actually merging. Tapping your brakes is not necessary and could actually confuse other drivers, so it should be avoided. Ultimately, signaling and checking mirrors and blind spots are all important steps to ensure safe lane changes.