In which situation is a driver not required to wear a seatbelt?

A driver is not required to wear a seatbelt when parked. This is because the primary function of a seatbelt is to provide safety while a vehicle is in motion. When the vehicle is parked, it is not moving, and the risk of injury from a collision is effectively eliminated. Therefore, in this situation, the seatbelt requirement does not apply.

While the other situations may involve various levels of risk or traffic conditions, they all require the use of seatbelts to ensure safety while driving. Reversing, driving on the highway, and navigating through traffic all involve operating the vehicle in circumstances where a seatbelt is essential to protect the occupants in case of an unforeseen event or accident.