What should you do before changing lanes to the left?

Before changing lanes to the left, it is crucial to check your left mirror and look to the left. This step ensures that you have a clear view of the area adjacent to the lane you intend to move into. Checking the left mirror helps you identify any vehicles or obstacles that may be in your blind spot, while looking to the left provides an additional visual confirmation of the space you are about to enter.

This practice is fundamental to safe lane changes, as it helps prevent accidents by ensuring that you are fully aware of your surroundings. It's essential to confirm that the left lane is free of other vehicles or hazards before making the move, emphasizing the importance of being vigilant and aware while driving.