Question Doors should be closed while a school bus is being driven, except when: Answers Crossing railroad tracks. Needing to cool off the inside of the vehicle. There is no vehicle next to the bus. Explanation The doors of a school bus must be kept closed any time the bus is moving, except when it is crossing railroad tracks. Take a FREE Practice Test Now This questions appears in the following tests: Delaware Bus , Maine Bus , Missouri Bus , Rhode Island Bus , Vermont Bus , Washington Bus , Wisconsin Bus ,