How does one check their blind spots before changing lanes?

Looking over your shoulder in the direction you are moving is essential for checking blind spots before changing lanes because it allows you to see areas that are not visible in your mirrors. Even when side mirrors and rear-view mirrors are utilized, they do not capture every angle around the vehicle; thus, directly turning your head provides a more comprehensive view of the area adjacent to your vehicle.

This action is particularly important because blind spots can hide vehicles that are close to your sides, which may not be detected by mirrors alone. By physically turning your head, you gain a better understanding of the traffic situation and ensure a safer lane change, as it helps confirm that the path is clear and that you are not putting yourself or others at risk during the maneuver.

In contrast, the other methods mentioned do not offer the same level of visibility. Relying solely on mirrors does not account for any vehicles or obstacles that may be in the blind spots. Vehicle sensors can assist but are not foolproof, as they may fail to detect smaller vehicles or objects. Hence, an additional verification by looking over your shoulder is crucial for safe driving practices.