When should the driver focus on the rear-view mirrors?

Focusing on the rear-view mirrors when changing lanes and merging is crucial for safe driving. It allows the driver to check for vehicles approaching from behind or alongside in adjacent lanes, ensuring that the lane change or merge can be performed safely without risking collisions. This practice is an essential part of defensive driving, as it helps the driver maintain awareness of the surrounding traffic, which can be particularly dynamic.

The need to check mirrors goes beyond just changing lanes; it is integral to making informed decisions while driving. Regularly checking mirrors while driving establishes a comprehensive awareness of surrounding vehicles and conditions, but specific focus is especially important during maneuvers like lane changes and merges. This keeps the driver attuned to their immediate environment and any potential hazards.