Which type of mirror is NOT typically found on buses?

Buses typically use a variety of mirrors to enhance visibility and ensure safety while on the road. The correct answer indicates that round mirrors are not commonly found on buses, and this is primarily due to their design and functionality.

Convex mirrors are essential on buses since they provide a wider field of vision, helping drivers to better see objects and vehicles approaching from behind or on the sides. Flat mirrors are also employed to provide a more accurate image without distortion, which is critical for assessing distances and sizes of vehicles next to the bus.

Right/left side view mirrors are indispensable for monitoring the bus's immediate surroundings, allowing the driver to safely change lanes and navigate through traffic.

In contrast, round mirrors are less commonly used because they do not offer the same level of visibility or functionality as the other types. Their curvature does not provide the wide-angle view that convex mirrors do, which is crucial for larger vehicles like buses. Thus, while mirrors serve essential safety and operational purposes, round mirrors do not fit the practical needs of bus operation as effectively as the others do.