Which statement accurately describes the requirements for a bus that is at least 80 inches wide?

A bus that is at least 80 inches wide is subject to specific lighting requirements to ensure visibility and safety in various driving conditions. One of these requirements is that such a vehicle must be equipped with clearance lamps. Clearance lamps are used to indicate the overall width of the vehicle, helping to prevent accidents by making other drivers aware of its dimensions, particularly at night or in low-light conditions.

These lamps are typically positioned at the front and rear of the vehicle, which enhances visibility from different angles. This is particularly important for wider vehicles like buses to ensure that they are clearly seen by other road users. The requirement for clearance lamps aligns with safety regulations that aim to minimize risks associated with operating larger vehicles on the road. Other options mentioning only side markers or front and rear lights do not fulfill the complete requirement set for wider buses, as they do not provide the necessary indicators for overall width.