Opening and closing vehicle doors. No person shall open any door on a motor vehicle unless and until it is reasonably

§ 3705.  Opening and closing vehicle doors. No person shall open any door on a motor vehicle unless and until it is reasonably safe to do so and can be done without interfering with the movement of other traffic, nor shall any person leave a door open on a side of a vehicle available to moving traffic for a period of time longer than necessary to load or unload passengers.