Emergency roof hatches on a bus: Question Emergency roof hatches on a bus: Answers Must be closed before the bus is driven. Can be opened to allow for air movement during a drive. Must be removed before the bus is driven. Explanation On a bus, it is permissible to lock some emergency roof hatches in an open position to allow in fresh air. However, this should not be a regular practice. This questions appears in the following tests: California Passenger Kentucky Passenger Michigan Bus Minnesota Bus Vermont Passenger
