What should you always do before changing lanes?

Before changing lanes, it is essential to check your mirrors and blind spots to ensure that the lane is clear and safe to move into. This practice helps you to be aware of any vehicles that may not be visible in your mirrors, such as those in your blind spots, as well as to gauge the speed and distance of nearby traffic. This thorough assessment significantly reduces the risk of collisions and enhances overall road safety.

Signaling your intent is also crucial, but it should come after you have assessed your surroundings. Merging immediately without checking can lead to dangerous situations, especially if other vehicles are occupying the lane you intend to enter. Looking only in your rearview mirror provides an incomplete picture of the traffic situation, as it does not account for vehicles directly beside you that may be in your blind spots. Ignoring other vehicles entirely removes the awareness necessary for safe driving, potentially leading to accidents. Therefore, a comprehensive check of mirrors and blind spots is fundamental to making informed and safe lane changes.