Which of the following equipment is not required on Type 1 and Type 2 school buses?

The correct choice highlights that left and right side convex mirrors are not a requirement for Type 1 and Type 2 school buses. Unlike larger school buses, which have more stringent visibility requirements due to their size and the number of passengers they carry, Type 1 and Type 2 buses, which are smaller and typically transport fewer students, do not have the same degree of regulation regarding exterior convex mirrors.

On the other hand, a stop sign arm is essential for all types of school buses to enhance safety by signaling to other road users when children are boarding or alighting. Emergency exit doors are crucial on all school buses to ensure that passengers can escape safely in case of an emergency. Safety belts are required on these buses to protect passengers and are part of passenger safety standards.

Understanding these distinctions helps ensure that drivers know the necessary equipment for the various school bus classifications, contributing to the safety of students as they travel.