Before changing lanes to the left, you should:

Before changing lanes to the left, it is essential to check your left mirror and visually confirm the space to your left. This practice ensures that you are aware of any vehicles or obstacles that may be in your blind spot or in the lane you intend to enter. By looking in both your left mirror and directly to the left, you are taking crucial steps to maintain safety and prevent collisions.

This procedure emphasizes the importance of situational awareness while riding. Relying solely on your mirrors or only looking over your shoulder does not provide a comprehensive view of the area around you. Additionally, signaling your intent to change lanes beforehand is essential, but it should not be done without first ensuring that the lane change can be executed safely. Being thorough in checking mirrors and looking directly over your shoulder reinforces a responsible and cautious approach to lane changes.