Study for the TX DMV Written Driving Test.. Study with flashcards and multiple-choice questions. With over 500 questions. Practice the signs and driving rules. Updated for 2024. Get ready for your driving test!

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Before changing lanes, you must:

  1. Activate your turn signal

  2. Honk your horn

  3. Look into your rearview mirror

  4. Turn off all lights

The correct answer is: Activate your turn signal

A) Firstly, you should activate your turn signal before changing lanes so that you can give other drivers on the road notice of your intentions. This helps to ensure safety and reduce the risk of accidents. Honking your horn is not necessary and can be seen as aggressive or rude. Looking into your rearview mirror is important, but it is not the first step before changing lanes. You should also check your side mirrors and physically turn your head to check your blind spot. Turning off all lights is completely irrelevant and should not be done while driving. Therefore, the best course of action is to activate your turn signal before changing lanes.