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.
Wyo. Stat. Ann. § 31-5-121
Opening and closing vehicle doors
Known as the Uniform Act
The act spans §§ 31-5-101 to 31-5-124 (24 sections).
Official source: Wyoming Legislature. Reproduced from public-domain Wyoming statutes; confirm against the official source for the current text. Not legal advice.