What mirrors are required for a SPAB?

A School Pupil Activity Bus (SPAB) requires specific mirror configurations to ensure the safety of passengers and effective visibility for the driver. The combination of a right flat mirror, an interior mirror, and a left flat mirror is required because it offers the driver a comprehensive field of view around the bus.

The right flat mirror allows the driver to see along the right side of the bus, aiding in safe lane changes and right turns. The left flat mirror similarly provides visibility along the left side, which is essential for the same reasons. The interior mirror helps the driver keep an eye on the passengers and observe the area directly behind the bus, thus enhancing safety during maneuvers.

Other configurations, while possibly useful, do not meet the full requirements for visibility set forth for SPABs. For instance, options including convex mirrors may provide a wider field of view but do not offer the same flat perspectives that are required for certain maneuvers around school zones. The combination that includes crossview mirrors may not sufficiently cover the critical areas needed for safe operation. Thus, the necessity for both flat mirrors and the interior mirror to provide optimal visibility and safety is why this configuration is selected.