(1) Except as otherwise provided in subsection (2) of this section, this article 4 does not prevent local authorities, with respect to streets and highways under their jurisdiction and within the reasonable exercise of the police power, from:

(a) Regulating or prohibiting the stopping, standing, or parking of vehicles, consistent with the provisions of this article;

(b) Establishing parking meter zones where it is determined upon the basis of an engineering and traffic investigation that the installation and operation of parking meters is necessary to aid in the regulation and control of the parking of vehicles during the hours and on the days specified on parking meter signs;

(c) Regulating traffic by means of police officers or official traffic control devices, consistent with the provisions of this article;

(d) Regulating or prohibiting processions or assemblages on the highways, consistent with the provisions of this article;

(e) Designating particular highways or roadways for use by traffic moving in one direction, consistent with the provisions of this article;

(f) Designating any highway as a through highway or designating any intersection as a stop or yield intersection, consistent with the provisions of this article;

(g) Designating truck routes and restricting the use of highways, consistent with the provisions of this article;

(h) Regulating the operation of bicycles or electrical assisted bicycles and requiring the registration and licensing of same, including the requirement of a registration fee, consistent with the provisions of this article;

(i) Altering or establishing speed limits, consistent with the provisions of this article;

(j) Establishing speed limits for vehicles in public parks, consistent with the provisions of this article;

(k) Determining and designating streets, parts of streets, or specific lanes thereon upon which vehicular traffic shall proceed in one direction during one period and the opposite direction during another period of the day, consistent with the provisions of this article;

(l) Regulating or prohibiting the turning of vehicles, consistent with the provisions of this article;

(m) Designating no-passing zones, consistent with the provisions of this article;

(n) Prohibiting or regulating the use of controlled-access roadways by nonmotorized traffic or other kinds of traffic, consistent with the provisions of this article;

(o) Establishing minimum speed limits, consistent with the provisions of this article;

(p) Designating hazardous railroad crossings, consistent with the provisions of this article;

(q) Designating and regulating traffic on play streets, consistent with the provisions of this article;

(r) Prohibiting or restricting pedestrian crossing, consistent with the provisions of this article;

(s) Regulating the movement of traffic at school crossings by official traffic control devices or by duly authorized school crossing guards, consistent with the provisions of this article;

(t) Regulating persons propelling push carts;

(u) Regulating persons upon skates, coasters, sleds, or similar devices, consistent with the provisions of this article;

(v) Adopting such temporary or experimental regulations as may be necessary to cover emergencies or special conditions;

(w) Adopting such other traffic regulations as are provided for by this article;

(x) Closing a street or portion thereof temporarily and establishing appropriate detours or an alternative routing for the traffic affected, consistent with the provisions of this article;

(y) Regulating the local movement of traffic or the use of local streets where such is not provided for in this article;

(z) Regulating the operation of low-power scooters, consistent with the provisions of this article; except that local authorities shall be prohibited from establishing any requirements for the registration and licensing of low-power scooters;

(aa) Regulating the operation of low-speed electric vehicles, including, without limitation, establishing a safety inspection program, on streets and highways under their jurisdiction by resolution or ordinance of the governing body, if such regulation is consistent with the provisions of this title;

(bb) Authorizing and regulating the operation of golf cars on roadways by resolution or ordinance of the governing body, if the authorization or regulation is consistent with this title and does not authorize:

(I) An unlicensed driver of a golf car to carry a passenger who is under twenty-one years of age;

(II) Operation of a golf car by a person under sixteen years of age; or

(III) Operation of a golf car on a state highway; except that the ordinance or resolution may authorize a person to drive a golf car directly across a state highway at an at-grade crossing to continue traveling along a roadway that is not a state highway;

(cc) Authorizing, prohibiting, or regulating the use of an EPAMD on a roadway, sidewalk, bike path, or pedestrian path consistent with section 42-4-117 (1) and (3);

(dd) Authorizing or prohibiting the use of an electrical assisted bicycle on a bike or pedestrian path in accordance with section 42-4-1412;

(ee) Enacting the idling standards in conformity with section 42-14-103.

(2)

(a) An ordinance or regulation enacted under paragraph (a), (b), (e), (f), (g), (i), (j), (k), (l), (m), (n), (o), (p), (q), (r), (v), (x), (y), (aa), or (cc) of subsection (1) of this section may not take effect until official signs or other traffic control devices conforming to standards as required by section 42-4-602 and giving notice of the local traffic regulations are placed upon or at the entrances to the highway or part thereof affected as may be most appropriate.

(b) Subsection (1) of this section does not authorize a local authority to regulate or authorize the use of vehicles and motor vehicles on the state highway system that is subject to section 43-2-135, C.R.S., except in at-grade crossings where the roadway subject to the local authority's jurisdiction crosses the state highway. The local authority may regulate vehicles within such crossings only to the extent necessary to effect the local authority's power to regulate the roadway under the local authority's jurisdiction and only if the regulation or authorization does not interfere with the normal operation of the state highway.

(3)

(a) A board of county commissioners may by resolution authorize the use of designated portions of unimproved county roads within the unincorporated portion of the county for motor vehicles participating in timed endurance events and for such purposes shall make such regulations relating to the use of such roads and the operation of vehicles as are consistent with public safety in the conduct of such event and with the cooperation of county law enforcement officials.

(b) Such resolution by a board of county commissioners and regulations based thereon shall designate the specific route which may be used in such event, the time limitations imposed upon such use, any necessary restrictions in the use of such route by persons not participating in such event, special regulations concerning the operation of vehicles while participating in such event in which case any provisions of this article to the contrary shall not apply to such event, and such requirements concerning the sponsorship of any such event as may be reasonably necessary to assure adequate responsibility therefor.