Colorado Revised Statutes Title 42. Vehicles and Traffic § 42-4-1010. Driving on divided or controlled-access highways

(1) Whenever any highway has been divided into separate roadways by leaving an intervening space or by a physical barrier or clearly indicated dividing section so constructed as to impede vehicular traffic, every vehicle shall be driven only upon the right-hand roadway, unless directed or permitted to use another roadway by official traffic control devices. No vehicle shall be driven over, across, or within any such dividing space, barrier, or section, except through an opening in such physical barrier or dividing section or space or at a crossover or intersection as established, unless specifically prohibited by official signs and markings or by the provisions of section 42-4-902. However, this subsection (1) does not prohibit a left turn across a median island formed by standard pavement markings or other mountable or traversable devices as prescribed in the state traffic control manual when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway.

(3) The department of transportation may by resolution or order entered in its minutes and local authorities may by ordinance consistent with the provisions of section 43-2-135(1)(g), C.R.S., with respect to any controlled-access highway under their respective jurisdictions, prohibit the use of any such highway by any class or kind of traffic which is found to be incompatible with the normal and safe movement of traffic. The department of transportation or the local authority adopting such prohibitory regulations shall install official traffic control devices in conformity with the standards established by sections 42-4-601 and 42-4-602 at entrance points or along the highway on which such regulations are applicable. When such devices are so in place, giving notice thereof, no person shall disobey the restrictions made known by such devices. This subsection (3) shall not be construed to give the department authority to regulate pedestrian use of highways in a manner contrary to the provisions of section 42-4-805.

(4) Any person who violates any provision of this section commits a class A traffic infraction.