What should you be able to see if the convex mirrors are properly adjusted?

When convex mirrors are properly adjusted on a school bus, they provide a wider field of view than flat mirrors. This is crucial for the safety of students and the bus driver. By being able to see at least one traffic lane on either side, the driver can better monitor the surrounding environment, including other vehicles, pedestrians, and potential hazards. This enhanced visibility is essential for making safe decisions while driving, especially during maneuvers like turning, merging, or stopping.

Convex mirrors are designed to minimize blind spots, which can pose significant dangers. If a driver can see traffic lanes, they can effectively gauge the distance and speed of vehicles approaching from the sides, allowing for safer interaction with traffic. The other options do not provide the necessary broad view required for safe operation; focusing on specific parts of the bus or limited areas of the surroundings would leave critical blind spots, increasing the risk of accidents. Therefore, proper adjustment of convex mirrors to include at least one adjacent traffic lane is vital for safe bus operations.