Which actions are necessary for safe lane changes?

Safe lane changes are essential for maintaining safety on the road, and several crucial actions must be completed to ensure this. Signaling your intent to change lanes is the first step, as it communicates your actions to other drivers, allowing them to anticipate your movement and react appropriately.

Next, checking mirrors is crucial for understanding the surrounding traffic conditions, including the positions of other vehicles. This step is important, but it is not sufficient on its own; blind spots must also be considered, which is why looking over your shoulder is necessary. This helps to confirm that there are no vehicles or obstacles in your blind spots before proceeding to change lanes.

In summary, the correct answer emphasizes a comprehensive and cautious approach: signaling, checking mirrors, and looking over the shoulder collectively enhance safety during lane changes. Other actions, such as changing lanes without signaling or relying solely on mirrors, compromise safety and increase the risk of accidents, as they do not adequately inform other drivers or check all areas for potential hazards.