When may a bus be driven with an emergency exit door open?
Correct answer: D – Never
The passenger-vehicle guidance states that a bus must not be driven with an emergency exit door or window open. Emergency exits should be closed during the exterior and interior inspection before driving. Certain roof hatches may be locked partly open for ventilation, but that limited guidance does not apply to emergency exit doors.
Source: Louisiana Commercial Driver License Manual — § 4.1.2, “Access Doors and Panels”, Louisiana Commercial Driver License Manual — § 4.1.3, “Bus Interior”, Louisiana Commercial Driver License Manual — § 4.1.4, “Roof Hatches”

