When is a driver allowed to back up on a freeway?

Backing up on a freeway is not permitted under any circumstances for safety reasons. Freeways are designed for high-speed travel, and any reversal of direction poses a significant risk of accidents. Vehicles are expected to maintain a certain flow of traffic, and reversing can lead to confusion and dangerous situations for other drivers.

While there may be instances where a police officer could direct traffic in a specific manner, this does not justify backing up on a freeway. In emergency situations, drivers must follow safety protocols and find safer routes or methods to control the vehicle's direction. The main principle is that the freeway's design and traffic flow do not allow for any backing up, ensuring safety for all road users.