Monday, November 19, 2007

Utah Tire Chain Regulations

41-6a-1636. Tires which are prohibited -- Regulatory powers of state transportation department -- Winter use of studs -- Special permits -- Tread depth.

(1) A solid rubber tire on a vehicle shall have rubber on its entire traction surface at least one inch thick above the edge of the flange of the entire periphery.
(2) A person may not operate or move on a highway a motor vehicle, trailer, or semitrailer having a metal tire in contact with the roadway.
(3) Except as otherwise provided in this section, a person may not have a tire on a vehicle that is moved on a highway that has on the tire's periphery a block, stud, flange, cleat, or spike or any other protuberances of any material other than rubber which projects beyond the tread of the traction surface of the tire.
(4) In accordance with Title 63, Chapter 46a, Utah Administrative Rulemaking Act, the Department of Transportation may make rules to permit the use of tires on a vehicle having protuberances other than rubber, if the department concludes that protuberances do not:
(a) damage the highway significantly; or
(b) constitute a hazard to life, health, or property.
(5) Notwithstanding any other provision of this section, a person may use:
(a) a tire with protuberances consisting of tungsten carbide studs on a vehicle if the studs:
(i) are only used during the winter periods of October fifteenth through December thirty-first and January first through March thirty-first of each year;
(ii) do not project beyond the tread of the traction surface of the tire more than .050 inches; and
(iii) are not used on a vehicle with a maximum gross weight in excess of 9,000 pounds unless the vehicle is an emergency vehicle or school bus;
(b) farm machinery with tires having protuberances which will not injure the highway; and
(c) tire chains of reasonable proportions on a vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
(6) Notwithstanding any other provision of this chapter, a highway authority, for a highway under its jurisdiction, may issue special permits authorizing the operation on a highway of:
(a) farm tractors;
(b) other farm machinery; or
(c) traction engines or tractors having movable tracks with transverse corrugations on the periphery of the movable tracks.
(7) (a) A person may not operate a vehicle if one or more of the tires in use on the vehicle:
(i) is in an unsafe operating condition; or
(ii) has a tread depth less than 2/32 inch measured in any two adjacent tread grooves at three equally spaced intervals around the circumference of the tire.
(b) The measurement under Subsection (7)(a) may not be made at the location of any tread wear indicator, tie bar, hump, or fillet.
(8) A person in the business of selling tires may not sell or offer for sale for highway use any tire prohibited for use under Subsection (7).

Renumbered and Amended by Chapter 2, 2005 General Session

For more information see Full Copy of Text here

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