If a bus has a red emergency door light, when must the driver turn it on?
Correct answer: C – At night or whenever the outside lights are used
The Virginia CDL manual requires a bus’s red emergency door light, if equipped, to work properly. The driver must turn it on at night and at any other time the bus’s outside lights are being used. The emergency exit sign must also remain clearly visible, and the bus must not be driven with an emergency door or window open.
Source: Virginia Commercial Driver’s License Manual — § 4.1.3, “Bus Interior”

