Before changing to the left lane while driving in the right lane on a multiple lane highway, you should:

Look over your left shoulder for vehicles on your left side.
Look in your rearview mirror for vehicles behind you.
Look in your side mirror for vehicles and turn on your signal light.
All of the above.
Explanation

Whenever you want to change lanes, make sure there are no vehicles in the lane you want to enter. First, look in your rearview and side mirrors. Then, look over your shoulder in the direction you plan to move to double-check for any vehicles approaching in the adjacent lane, minimizing the risk of a collision when changing lanes.

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🟡 This question is moderately difficult26.1% of our users answer it incorrectly.

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This question appears in the following DMV practice tests: