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 is the purpose of merging lanes when traffic is congested?

To prevent slow-moving vehicles from blocking the right lane
To force other vehicles to slow down
To create more space on the highway
To give drivers with fast vehicles preference

The correct answer is: To prevent slow-moving vehicles from blocking the right lane

When traffic is congested, merging lanes allows for slower-moving vehicles to move out of the way and prevent them from blocking the faster-moving vehicles in the right lane. This helps maintain a steady flow of traffic and prevent accidents. The other options are incorrect because merging lanes is not meant to force vehicles to slow down, create more space on the highway, or give preference to drivers with fast vehicles. The main purpose is to maintain the flow of traffic and prevent disruptions caused by slower-moving vehicles.