What must every bus or truck be equipped with on the rear?

Every bus or truck must be equipped with two stop lights on the rear to enhance visibility and signal the intention to stop to drivers following behind. The use of two stop lights provides a more effective warning than just one, reducing the chances of a rear-end collision. This requirement is crucial for safety regulations to ensure that other road users can clearly see when a vehicle is slowing down or coming to a stop.

While other lighting equipment is also important—such as tail lights for visibility at night and turn signals for signaling lane changes or turns—the regulation specifically mandates that there must be at least two stop lights positioned on the back of the vehicle to clearly communicate stopping intentions. This is a fundamental aspect of vehicle safety that is enforced to protect not only the vehicle occupants but also other road users.