No person shall open the door of a motor vehicle on the side available to moving traffic 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 the side of a vehicle available to moving traffic for a period of time longer than necessary to load or unload passengers. Any person who violates any provision of this section commits a class B traffic infraction.
C.R.S. § 42-4-1207
This section is similar to former § 42-4-1107 as it existed prior to 1994, and the former § 42-4-1207 was relocated to § 42-4-1406 .