What type of mirror must be installed on all new school buses?

The correct choice is a convex-type mirror for the roadway in front of the bus. Convex mirrors are specifically designed to provide a wider field of view compared to flat mirrors. This is particularly important for large vehicles like school buses, which have significant blind spots due to their size and shape.

By using a convex mirror, bus drivers can see more of the area directly in front of them, which helps in detecting any obstacles, pedestrians, or other vehicles that may be in their path. The importance of this feature is heightened when considering the safety of children who may be nearby, making it essential for new school buses to have such mirrors installed for improved visibility and safe operation.

In contrast, mirrors aimed at specific sides or the rear would not address the critical need for visibility directly in front of the bus, where potential hazards can arise as the bus is moving or coming to a stop. Hence, installing a convex-type mirror that offers a broad view in the front is a standardized requirement for enhancing safety in school bus operations.