2013 Maryland Code
§ 21-1105 - Opening and closing vehicle doors
(a) A person may not open the door of a motor vehicle on any side available to moving traffic unless:
(1) It is reasonably safe to do so; and
(2) It can be done without interfering with the movement of other traffic.
(b) A person may not leave a door open on any side of a vehicle available to moving traffic for any period longer than necessary to load or unload passengers.
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