Colorado Vehicles Permitted to Use Emergency Vehicle Lights


(6)(a) The department of transportation and local authorities, within their respective jurisdictions, may, for the purpose of road construction and maintenance, temporarily close to through traffic or to all vehicular traffic any highway or portion thereof for a period not to exceed a specified number of workdays for project completion and shall, in conjunction with any such road closure, establish appropriate detours or provide for an alternative routing of the traffic affected when, in the opinion of said department or concerned local authorities, as evidenced by resolution or ordinance, such temporary closing of the highway or portion thereof and such rerouting of traffic is necessary for traffic safety and for the protection of work crews and road equipment.  Such temporary closing of the highway or portion thereof and the routing of traffic along other roads shall not become effective until official traffic control devices are erected giving notice of the restrictions, and, when such devices are in place, no driver shall disobey the instructions or directions thereof.

(b) Local authorities, within their respective jurisdictions, may provide for the temporary closing to vehicular traffic of any portion of a highway during a specified period of the day for the purpose of celebrations, parades, and special local events or civic functions when in the opinion of said authorities such temporary closing is necessary for the safety and protection of persons who are to use that portion of the highway during the temporary closing.

(c) The department of transportation, local municipal authorities, and local county authorities shall enter into agreements with one another for the establishment, signing, and marking of appropriate detours and alternative routes which jointly affect state and local road systems and which are necessary to carry out the provisions of paragraphs (a) and (b) of this subsection (6).  Any temporary closing of a street which is a state highway and any rerouting of state highway traffic shall have the approval of the department of transportation before such closing and rerouting becomes effective.



(1) Except as otherwise provided in this section or in section 42-4-222 in the case of volunteer fire vehicles and volunteer ambulances, every authorized emergency vehicle shall, in addition to any other equipment and distinctive markings required by this article, be equipped as a minimum with a siren and a horn.  Such devices shall be capable of emitting a sound audible under normal conditions from a distance of not less than five hundred feet

(2) Every authorized emergency vehicle, except those used as undercover vehicles by governmental agencies, shall, in addition to any other equipment and distinctive markings required by this article, be equipped with at least one signal lamp mounted as high as practicable, which shall be capable of displaying a flashing, oscillating, or rotating red light to the front and to the rear having sufficient intensity to be visible at five hundred feet in normal sunlight.  In addition to the required red light, flashing, oscillating, or rotating signal lights may be used which emit blue, white, or blue in combination with white

(3) A police vehicle, when used as an authorized emergency vehicle, may but need not be equipped with the red lights specified in this section.

(4) Any authorized emergency vehicle, including those authorized by section 42-4-222, may be equipped with green flashing lights, mounted at sufficient height and having sufficient intensity to be visible at five hundred feet in all directions in normal daylight.  Such lights may only be used at the single designated command post at any emergency location or incident and only when such command post is stationary.  The single command post shall be designated by the on-scene incident commander in accordance with local or state government emergency plans.  Any other use of a green light by a vehicle shall constitute a violation of this section.

(5) The use of either the audible or the visual signal equipment described in this section shall impose upon drivers of other vehicles the obligation to yield right-of-way and stop as prescribed in section 42-4-705.

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