State Tire Chain Laws

There are about as many different chain laws as there are states, ranging from no requirements to very detailed laws. Here’s a breakdown on each states’ chain requirements.

State Regulations and laws regarding chains and metal studs on tires
Alabama §32-5-210. Tire requirements.
(b)No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, or spike or any other protuberances of any material other than rubber which project beyond the tread of the traction surface of the tire, except that it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway and, except also, that it shall be permissible to use tire chains or metal studded or safety spike tires of reasonable proportions upon any vehicle when required for safety because of snow, rain or other conditions tending to cause a vehicle to slide or skid.
Alaska Sec. 28.35.155. Operation of vehicle with certain tires prohibited (a) It is unlawful to operate a motor vehicle with studded tires or tires with chains attached on a paved highway or road from May 1 through September 15, inclusive, north of 60 North Latitude and from April 15 through September 30, inclusive, south of 60 North Latitude, except that any latitude on a paved portion of the Sterling Highway a person may not operate a motor vehicle with studded tires or tires with chains attached from May 1 through September 15, inclusive. (b) In this section “studded tire” means a tire with metal studs or spikes imbedded in the periphery of the tire surface, and protruding not more than one-forth inch from the tire surface
Arizona A.R.S. § 28-958 (2004) § 28-958. Tire equipment restrictions B. A tire on a vehicle that is moved on a highway shall not have on its periphery any block, stud, flange, cleat, spike or other protuberance that is made of any material other than rubber and that projects beyond the tread of the traction surface of the tire, except that it is permissible to use: 2. 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. From October 1 to May 1 pneumatic tires containing metal type studs of tungsten carbide or other suitable material that are inserted or constructed in a manner so the the number of studs or the percentage of metal in contact with the roadway does not exceed three percent of the total tire area in contact with the roadway under any conditions.
Arkansas A.C.A. § 27-37-401 (2003) § 27-37-401. (c) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, spike, or any other protuberances of any material except rubber which projects beyond the tread of the traction surface of the tire, with the following exceptions (2) It shall be permissible to use tire chains of reasonable proportions upon any vehicle for safety; (3) It shall be permissible to use metal studded tires as prescribed in § 27-37-402.
California Cal Veh Code § 27454 (2004) § 27454. Protuberances on tires. No tire on any vehicle upon any highway shall have on its periphery any block, stud, flange, cleat, ridge, bead, or any other protuberance of metal or wood that projects beyond the tread of the traction surface of the tire. This section does not apply to any of the following:(a) Tire traction devices of reasonable size used to prevent skidding when upon wet surfaces or when upon snow or ice. (b) Pneumatic tires that have embedded therein wire not to exceed 0.075 of an inch in diameter and that are so constructed that under no conditions will the percentage of metal in contact with the roadway exceed 5 percent of the total tire area in contact with the roadway, except that during the first 1,000 miles of use or operation of the tire, the metal in contact with the roadway may exceed 5 percent of the tire area in contact with the roadway, but shall in no event exceed 20 percent of the area. (c) Vehicles operated upon unimproved roadways when necessary in the construction or repair of highways. (d) Traction engines or tractors when operated under the conditions of a permit first obtained from the Department of Transportation. (e) Pneumatic tires containing metal-type studs of tungsten carbide or other suitable material that are so inserted or constructed that under no conditions will the number of studs or the percentage of metal in contact with the roadway exceed 3 percent of the total tire area in contact with the roadway, between November 1 and April 30 of each year. The commissioner, after consultation with the Department of Transportation, may extend the period of time during which studded pneumatic tires may be used in any area of the state for the protection of the public because of adverse weather conditions. (f) Pneumatic tires used on an authorized emergency vehicle, as defined in Section 165, containing metal-type studs of tungsten carbide or other suitable material, it the studs are so inserted or constructed that under no conditions will the number of studs or the percentage of metal in contact with the roadway exceed 3 percent of the total tire area in contact with the roadway. Notwithstanding subdivision (e), authorized emergency vehicles are permitted the unrestricted use of studded pneumatic tires throughout the year.
Colorado C.R.S. 42-4-106 (2003) 42-4-106. (5) (a) (I) the department of transportation shall also have the authority to close any portion of a state highway to public travel or to prohibit the use thereof unless motor vehicles using the same are equipped with tire chains, four-wheel drive with adequate tires for the existing conditions, or snow tires with a “mud and snow” or all weather rating from the manufacturer having a tread of sufficient abrasive or skid-resistant design or composition and depth to provide adequate traction under existing driving conditions during storms or when other dangerous driving conditions exist or during construction or maintenance operations whenever the department considers such closing or restriction or use necessary for the protection and safety of the public. Such prohibition or restriction of use shall be effective when signs, including temporary or electronic signs, giving notice thereof are erected upon such portion of said highway, and it shall be unlawful to proceed in violation of such notice. The Colorado state patrol shall cooperate with the department of transportation in the enforcement of any such closing or restriction of use. “Tire chains”, as used in this subsection (5) means metal chains which consist of two circular metal loops, one on each side of the tire, connected by not less than nine evenly spaced chains across the tire tread and any other traction devices differing from such metal chains in construction, material, or design but capable of providing traction equal to or exceeding that of such metal chains under similar conditions. The operator of a commercial vehicle with four or more drive wheels other than a bus shall affix tire chains to at least four of the drive wheel tires of such vehicle when such vehicle is required to be equipped with tire chains under this subsection (5). The operator of a bus shall affix tire chains to at least two of the drive wheel tires of such vehicle when such vehicle is required to be equipped with tire chains under this subsection (5).C.R.S. 42-4-228 (2003) 42-4-228. Restrictions on tire equipment (3) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, spike, or any other protuberances of any material except rubber which projects beyond the tread of the traction surface of the tire; except that, on single-tired passenger vehicles and on other single-tired vehicles with rated capacities up to and including three-forth’s ton, it shall be permissible to use tires containing studs or other protuberances which do not project more than one-sixteenth of and inch beyond the tread of the traction surface of the tire; and except that it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway; and except also that it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
Connecticut (51) “Nonskid device” means any device applied to the tires, wheels, axles or frame of a motor vehicle for the purpose of increasing the traction of the motor vehicle.Conn. Gen. Stat. §14-98 (2003) §14-98. Tires. Each vehicle operated upon any highway or bridge shall be equipped with tires of rubber, or other elastic substance, approved by the commissioner, and the wheels shall be so constructed that no metal part of the wheel or tire be in contact with the surface of the road at any time when such vehicle is in motion upon the highway, except such vehicle may be equipped with tires incorporating a metal nonskid device during the period from November fifteenth to April thirtieth, inclusive.
Delaware 21 Del. C. § 4302 (2004) § 4302. Projections from periphery of tires; exceptions (a) No tire on a vehicle moved on a highway shall have on its periphery any 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, except as otherwise provided in this section. Farm machinery with tires having protuberances which will not injure the highway may be used, and tire chains of reasonable proportions may be used upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to slide or skid. (b) The use of studded tires on all motor vehicles using the highways of this State is permitted from October 15 to April 15.
Florida  
Georgia O.C.G.A. § 40-8-74 (2004) §40-8-74. Tires (c) No tire on a vehicle moved on a highway shall have on its periphery any 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, except that it shall be permissible to use: (2) Tire chains of reasonable proportions or tires equipped with safety metal spike studs upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
Hawaii § 291-33. Projections on face of wheels prohibited. There shall not be operated or moved upon any public road, street, or highway with the State, any vehicle, motor vehicle, or other power vehicle the face of the wheels of which are fitted or equipped with flanges, ribs, clamps, cleats, lugs, chains, spikes, or other projections, other than rubber blocks, destructive to the road surfaces. This provision applies to all rings or flanges upon guiding or steering wheels of such vehicles, but it shall not be so construed as to prevent (1) the use of ordinary detachable tire or skid chains, or (2) the use of studded snow tires on either the Mauna Kea access road above Hale Pahaku or on any road within the Mauna Kea Science Reserve leased to the University of Hawaii.
Idaho § 49.948. Restrictions as to tire equipment (3) No tire on a vehicle moved on a highway shall have on its periphery any 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, except as allowed herein. It shall be permissible to use farm machinery with tires having protuberances which will not injure the highway, and it shall be permissible to use tire chains. Tires with built-in lugs of tungsten carbide or other suitable material, hereinafter called studs, may be used upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid, that will not unduly damage the highway. Motor vehicles, trailers and semi trailers with tires having built-in studs are prohibited on public highways between the dates of May 1 and September 30, annually, except as provided in paragraphs (a) and (b) of this subsection: (a) Fire pumper/tanker trucks and ladder trucks belonging to fire departments and firefighting agencies are exempt from the prohibited dates. (b) Special exemptions from the prohibited dates may be granted by the Idaho transportation board if it is found by the board that enhancements to public safety outweigh the increased pavement wear.
Illinois § 625 ILCS 5/12-401. Restriction as to tire equipment Sec. 12-401. Restriction as to tire equipment. Nothing in this section shall be deemed to prohibit the use of tire chains of reasonable proportion upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid.
Indiana § 9-19-18-3. Use of block, stud, flange, cleat, or spike on tire periphery. (a) Except as provided in subsections (b) through (d), a tire on a vehicle moved on a highway may not have on the tire’s periphery a block, stud, flange, cleat, or spike or any other protuberance of any material other than rubber that projects beyond the tread of the traction surface of the tire. (c) Tire chains of reasonable proportions may be used upon a vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. (d) From October 1 to the following May 1, a vehicle may use tires in which have been inserted ice grips or tire studs of wear-resisting material, installed in a manner the provides resiliency upon contact with the road, with projections that do not exceed three thirty-seconds (3/32) of an inch beyond the tread of the traction surface of the tire, and constructed to prevent any appreciable damage to the road surface.
Iowa Iowa Code § 321.442 (2003) 321.442 Projections on wheels. No tire on a vehicle moved on a highway shall have on its periphery any 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 except that it shall be permissible to use: 2: Tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. 3. Pneumatic tires with inserted ice grips or tire studs projecting not more than on sixteenth inch beyond the tread of the traction surface of the tire upon any vehicle from November 1 of each year to April 1 of the following year, except that a school bus and fire department emergency apparatus may use such tires at any time.
Kansas K.S.A. § 8-1742 (2003) 8-1742. Restrictions as to tire equipment: (c) No tire on a vehicle moved on a highway shall have on its periphery any 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 except that it shall be permissible to use: (2) tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. (3) studded traction equipment upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid; or (4) pneumatic tires having metallic or nonmetallic studs designed to improve traction without materially injuring the surface of the highway. To qualify under paragraph (3) or (4), such tires or studded traction equipment shall be approved by the secretary of transportation by adoption of rules and regulations, and their use may be limited to certain months or types of vehicles by such rules and regulations.
Kentucky KRS § 189.190 (2004)§ 189.190. Chains and lugs on wheels — Thickness of solid rubber tires (1) No person shall use on a highway not covered with ice, a vehicle with a chained wheel, unless the wheel rests upon an ice shoe at least six (6) inches wide. (2) Where chains are used on rubber-tired vehicles, the cross chains shall be not more than three-fourths (3/4) of an inch in thickness or diameter, and shall be spaced not more than ten (10) inches apart, around the circumference of the tires.
Louisiana La. R.S. 32:362 (2004) §362 Restrictions as to tire equipment B. No tire on a vehicle moved on a highway shall have on its periphery any protuberances of any material, other than rubber, which projects beyond the thread of the traction surface of the tire, except that it shall be permissible to: (2) Use tire chains of reasonable proportions upon any vehicle, when required for safety because of conditions tending to cause a vehicle to slide or skid.
Maine 29-A M.R.S. § 1924 (2003)§ 1919. Studded tires 1. Prohibited May 1st to October 1st. Except as provided in subsections 2 and 3, from the first day of May to the first day of October, a person may not operate a vehicle with tires having metal studs, wires, spikes or other metal protruding from the tire tread.2. Extension of use period and issuance of permit. Extended use of studded tires may be permitted according to this subsection. A. A person may use studded tires for periods other than those specified in subsection 1, if the Commissioner of Transportation extends the use period or, in a special case, issues a permit covering stated periods of time for the use of studded tires.
Maryland Md. Transportation Code Ann. § 21-1119 (2003) § 21-1119. (d) Travel on snow emergency routes. — A person may not drive or attempt to drive a motor vehicle other than a motorcycle, on any highway that is designated and appropriately signposted as a snow emergency route and for which a snow emergency has been declared and is in effect, unless the vehicle is equipped with chains or snow tires on at least one wheel at each end of a driving axle.
Massachusetts ALM GL ch. 90, §16 (2004)§ 16. No person, except a duly authorized person driving an emergency fire vehicle, shall operate a motor vehicle equipped with metal studded tires upon a public highway between May the first and November the first; provided, however, the registrar may authorize the use of such tires before November the first, if weather conditions require the use thereof.
Michigan MCL § 257.710§ 257.710. (a) A person shall not operate on a public highway of this state a vehicle or special mobile equipment which has metal or plastic track or a tire which is equipped with metal that comes in contact with the surface of the road or which has a partial contact of metal or plastic with the surface of the road, except as provided in subsections (c), (d), and (e). (b) A person shall not operate on a highway a vehicle which has a tire that has on its periphery a block, stud, flange, cleat, spike, or other protuberance of a material other than rubber which projects beyond the tread of the traction surface of the tire, except as provided in subsections (c), (d), and (e). A person may also use a tire chain of reasonable proportion upon a vehicle when required for safety because of snow, ice, or other condition tending to cause a vehicle to skid. (c) A person may operate on a highway a vehicle which has a pneumatic tire in which wire of 0.075 inches in diameter or less is embedded in the tire is constructed so that the percent of metal in contact with the highway does not exceed 5% of the total tire area in contact with the roadway, except that during the first 1,000 miles of use or operation of the tire the metal in contact with the highway shall not exceed 20% of the area. (d) The department of state highways and transportation shall promulgate rules establishing acceptable standards to permit the use of a tire with studs or other traction devices to be used on a street or highway after April 1, 1975. The rules shall make separate provision for the extreme winter snow and ice conditions of the Upper Peninsula and the northern Lower Peninsula. The rules shall include a restriction on the amount and dimension of protrusions that may be allowed on a tire, the type of material that may be used in a stud, traction device, or tire, and the amount of road wear that a tire with studs or other traction devices may cause on a street or highway. (e) A person may operate on a highway a vehicle which has pneumatic tire in which are inserted ice grips or tire studs if the person is a law enforcement officer operating a vehicle owned by a law enforcement agency, a person operating an ambulance, or a United States postal service rural carrier driving a vehicle the rural carrier owns and maintains as a prerequisite to employment in the postal service.
Minnesota Minn. Stat. § 169.72 (2003) 169.72 Tire surface; metal studs Subdivision 1. Solid rubber, metal, and studded tires; exceptions; permits (c) Except as otherwise provided in this section, no tire on a vehicle moved on a highway shall have on its periphery any 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. It shall be permissible to use any of the following on highways: implements of husbandry with tires having protuberances which will no injure the highway, and it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
Mississippi Miss. Code Ann. § 63-7-67 (2004) §63-7-67. Tires. No tire on a vehicle moved on a highway shall have on its periphery any 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. However, it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway, and it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
Missouri § 307.171 R.S.Mo (2004) §307.171. Studded tires, prohibited when–penalty. 1. No person shall operate any vehicle on any road or highway of this state between the first day of April and the first day of November while the motor vehicle is equipped with tires containing metal or carbide studs.
Montana 61-9-406. Restrictions as to tire equipment — particular tires, chains, or traction equipment. (3) A tire on a vehicle moved on a highway may not have on its periphery any 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. However, it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway. It is also permissible to use tire chains of reasonable proportions or pneumatic tires, the traction surfaces of which have been embedded with material, such as wood, wire, plastic or metal, that may not protrude more than one-sixteenth of an inch beyond the tire tread or that are clearly marked by the manufacturer on the sidewalls”all season m&s” (or “all season mud and snow”), upon a vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. The use of pneumatic tires embedded as provided in this section is permitted only between October 1 and May 31 of each year, except that on of those tires may be used for a spare in case of tire failure. School busses equipped with such embedded pneumatic tires may operate from August 15 through the following June 15.
(5)If the department of transportation determines at any time that dangerous or unsafe conditions on a highway require particular tires, tire chains, or traction equipment for vehicles in addition to or beyond the ordinary pneumatic rubber tires, the department may establish the following recommendations or requirements with respect to the use of the equipment for all vehicles on the highway:
(a) chains or other approved traction devices recommended for driver wheels;
(b) chains or other approved traction devices required for driver wheels; or
(c) chains required for driver wheels.
(6)Equipment required by subsection (5)(b) or (5)(c) must conform to rules established by the department of justice.
(7)The department of transportation shall place and maintain signs and other traffic control devices on a highway designated under subsection (5) that indicate the tire, tire chain, or traction equipment recommendation or requirement determined for vehicles. The signs or traffic control devices may not prohibit the use of pneumatic tires embedded as provided in subsection (3) between October 1 and May 31 of each year, but when the department of transportation determines that chains are required and that no other traction equipment will suffice, the requirement is applicable to tires on driver wheels of one axle of a vehicle, including embedded tires. The signs or traffic control devices may differentiate in recommendations for four-wheel-drive vehicles in gear.
Nebraska 1. R.R.S. Neb. § 60-6,250 (2004), (2) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, or spike or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that: (a) This prohibition shall no apply to pneumatic tires with metal or meta-type studs not exceeding five-sixteenths of an inch in diameter inclusive of the stud-casing with an average protrusion beyond the tread surface of not more that seven sixty-fourths on an inch between November 1 and April 1, except that school buses, mail carrier vehicles, and emergency vehicles shall be permitted to use metal or metal-type studs at any time during the year; (b) It shall be permissible to use farm machinery with tires having protuberances which will no injure the highway; and (c) It shall be permissible to use tire chains of reasonable proportions upon any vehicle when requires for safety because of snow, ice, or other conditions tending to cause a vehicle to slide or skid.
Nevada NRS § 484.6425 (2004) §484.6425. Use of certain studded tires prohibited. 1. Except as provided in subsection 2, a person shall not operate any motor vehicle equipped with tires which have on the periphery any block, flange, cleat, bead or any other protuberance of metal or wood which projects beyond the tread of traction surface of the tire. 2. This section does not prohibit: (a) Tire chains or traction devices approved by the director. (b) Pneumatic tires which have embedded therein wire not exceeding 0.075 inch in diameter and which are so constructed that under no conditions will the percentage of metal in contact with the roadway exceed 5 percent of the total tire area in contact with the roadway, except that during the first 1,000 miles of use, the metal in contact with the roadway may exceed 5 percent of the tire area in contact with the roadway but must not exceed 20 percent of that area. (c) Pneumatic tires containing metal-type studs of tungsten carbide or other suitable material which are so inserted or constructed that under no conditions will the percentage of metal in contact with the roadway exceed 3 percent of the total tire area in contact with the roadway, but such tires may only be used between October 1 and April 30. (d) The operation of vehicles upon unimproved roadways when necessary in the construction or repair of highways. (e) The operation of traction engines or tractors under conditions of a permit first obtained from the department of transportation with respect to highways under its jurisdiction or the governing body of a city or county with respect to roads under its jurisdiction.
NRS § 484.643 (2004) § 484.643. Traction devices, tire chains or snow tires: Use required where highway marked or posted. 1. It is unlawful for any person to operate a motor vehicle, whether it is an emergency vehicle or otherwise, without traction devices, tire chains or snow tires upon any street or highway, under icy or snowy conditions, when the highway is marked or posted with signs for the requirement of traction devices, chains, or snow tires. 2. The director shall adopt regulations defining “traction device,” “tire chain” and “snow tire.” The director shall consider regulations of the Federal Highway Administration and the National Highway Traffic Safety Administration and publications of the Rubber Manufacturers Association. The regulations must specify minimum standards for the patterns of tread on snow tires which will provide adequate traction in mud and snow.
NRS § 484.6432 (2004) § 484.6432. Traction devices, tire chains or snow tires; Requirements under certain circumstances. 1. If a highway is in this state and marked or posted with signs requiring the use of traction devices, tire chains or snow tires, a motor vehicle or combination of vehicles must be equipped with: (a) Traction devices, tire chains or snow tires if it has a gross weight or combined gross weight of 10,000 pounds or less. (b) Tire chains if it has a gross weight or combined gross weight of more than 10,000 pounds. 2. If a highway in this state is marked or posted with signs requiring the use of traction devices or tire chains on all motor vehicles except vehicles with 4-wheel drive and snow tires on all wheels, all such motor vehicles must be equipped with traction devices or tire chains.
NRS § 484.6436 (2004) § 484.6436. Mechanical device to provide traction if mechanical devices are mounted on both sides of a motor vehicle which, when activated by the driver, provide traction by deploying a chain of metal cross members under a tire while the vehicle is in motion, the: 1. Cross members must extend across at least 85 percent of the width of the tire; and 2. Devices may be used only upon the drive axles of the vehicle.
New Hampshire  
New Jersey N.J. Stat. § 39:3-73 (2004) § 39:3-73. Tire-chains Motor vehicle tires may be fitted with tire-chains of reasonable proportions when roads, streets and highways are slippery, because of rain, snow, ice, oil, manner of construction or other reason; provided, however, that no tire-chains shall be used at any time on improved highways when highway conditions do not make such use necessary for the safety of life or property. No person shall use any tire-chains so constructed or installed as to be likely to be thrown so as to endanger any person or property. 30. N.J. Stat. § 39:3-73 (2004)
New Mexico § 66-3-847. Restrictions as to tire equipment B. A person shall not operate or move on a highway a motor vehicle, trailer or semitrailer having any metal tire in contact with the roadway except that for the purposes of the Motor Vehicle Code [66-1-1 NMSA 1978], a now tire with metal studs designed to increase traction on ice or snow shall not be considered a metal tire. C. No tire on a vehicle moved on a highway shall have on its periphery any block, flange, cleat or spike or any other protuberances of any material other than rubber that projects beyond the tread of the traction surface of the tire except that it shall be permissible to use farm machinery with tires having protuberances that will not injure the highway and except also that it shall be permissible to use tire chains of reasonable proportions or snow tires with metal studs designed to increase traction on ice or snow upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid.
New York  
North Carolina § 20-122. Restrictions as to tire equipment (b) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat or spike or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that it shall be permissible to use farm machinery with tires having protuberances that will not injure the highway and except also, that it shall be permissible to use tire chains of reasonable proportions or snow tires with metal studs designed to increase traction on ice or snow upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to slide or skid. It shall be permissible to use upon any vehicle for increased safety, regular and snow tires with studs which project beyond the tread of the traction surface of the tire not more than one sixteenth of an inch when compressed.
North Dakota § 39-21-40. Restrictions as to tire equipment 13. No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat or spike or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that it shall be permissible to use farm machinery with tires having protuberances that will not injure the highway and except also, that it shall be permissible to use tire chains of reasonable proportions. It is also permissible to use, from October fifteenth to April fifteenth, pneumatic tires which have metal studs which do not project more than one-sixteenth of an inch [1.59 millimeters] beyond the tread of the traction surface of the tire, except that it is permissible to use such tires on school busses at any time during the year.
Ohio ORC Ann. 5589.08 (2004) § 5589.08. (a) For purposes of this section, “studded tire” means any tire designed for use on a vehicle, and quipped with metal studs or studs of wear-resisting material that project beyond the tread of the traction surface of the tire; and “motor vehicle,” “street or highway,” “public safety vehicle,” and “school bus” have the same meaning as given those terms in section 4511.01 of the Revised Code. (B) No person shall operate any motor vehicle, other than a public safety vehicle or school bus, that is equipped with studded tires on any street or highway in this state, except during the period from the first day of November of each year through the fifteenth day of April of the succeeding year. (C) This section does not apply to the use of tire chains when there is snow or ice on the streets or highways where such chains are being used, or the immediate vicinity thereof.
Oklahoma § 12-405. Tires and wheels — Peripheral equipment — Unsafe operating condition. A. Every 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. B. A person shall not operate or move on any hard-surfaced highway any vehicle having any metal tire in contact with the roadway, except when authorized by special permit as provided in subsection E of this section. C. 1. Any tire on a vehicle moved on a highway shall not have on its periphery any block, stud, flange, cleat or spike or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that it shall be permissible: b. to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid, or c. for pneumatic tires equipped with or having on their periphery studs of metal, porcelain or other material to be sold or used in this state, if constructed to provide resiliency upon contact with the road surface, so that not more than three percent (3%) in the aggregate of the traction surface of such tire be composed of such studs and so that such studs do not project more than three thirty-seconds (3/32) of an inch beyond the tread of the traction surface of such tire and have a rate of wear which will so limit such projection. 2. The exceptions permitted in paragraph 1 of this subsection shall be subject to the following restrictions: a. the use of such tires or tire chains shall be limited to vehicles with rated capacities up to and including two (2) tons, b. any tire so equipped shall not be used on a public highway earlier than November 1 of each year or later than April 1 of the following year, and c. copies of this subsection shall be posted in all places at which tires or tire chains are sold, and a printed or written warning on the time limitation for the use of such tires or tire chains shall be furnished to each buyer, purchaser, or user by the seller of such studded tires or tire chains. D. Operator selectable “on demand” studded tires having traction-enhancing studs located outside the normal tread area which allows their operation as conventional tires on dry roads or as studded tires on ice-coated roads by the expedient of reducing or increasing the air pressure within tires, shall be exempt from the prohibitions of subsection C of this section with the following exceptions: 1. The use of such tires shall be limited to vehicles with rated capacities up to and including two (2) tons; 2. Any such tire shall not be deflated so that the studs lower and make contact with the road surface earlier than November 1 of each year or later than April 1 of the following year.
Oregon ORS § 815.045 (2003) 815.045. Rules for the use of traction tires and chains; signs. (1) The Oregon Transportation Commission shall adopt rules necessary to carry out ORS 815.140. The rules adopted by the commission: (b) Shall define types of vehicle traction tires or chains that may be used under various road conditions. The commission rules under this paragraph shall comply with the following: (D) Chains shall be defined to include link chains, cable chains or any other device that attaches to the wheel, vehicle or outside of the tire and that augments the traction of a vehicle.
Pennsylvania 75 Pa. C.S. § 4525 (2004)§ 4525. Tire equipment and traction surfaces (c) ICE GRIPS AND TIRE STUDS. — Tires in which ice grips or tire studs of wear resisting material have been installed which provide resiliency upon contact with the road and which have projections not exceeding two thirty-seconds of an inch beyond the tread of the traction surface of the tire shall be permitted between November 1 of each year and April 16 of the following year. The Governor may by executive order extend the time tires with ice grips or tire studs may be used when highway condition are such that such tires would be a safety factor in traveling Commonwealth highways. The use of tires with ice grips or tire studs contrary to the provisions of this subsection shall be unlawful. (d) TIRE CHAINS — Tire chains may be temporarily used on vehicles during periods of snow and ice emergency if the are in conformance with regulations promulgated by the department.
Rhode Island §31-23-20. Protuberances on tires. No tires on a vehicle moved on a highway shall have on its periphery any block, flange, cleat, or pointed spike or other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire except that: (1) It shall be permissible to use tires with flat-headed studs projecting one-sixteenth inch (1/16″) or less beyond the tread of the traction surface from the fifteenth day of November to the first day of April; (2) It shall be permissible to use farm machinery with tires having protuberances which will not injure the highway; and (3) It shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. (4) Violations of this section are subject to fines enumerated in § 31-41.1-4.
South Carolina S.C. Code Ann. § 56-5-5040 (2003) § 56-5-5040. Tires. No person shall operate or move on any highway any motor vehicle, trailer or semitrailer having any metal tire in contact with the roadway. No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat or spike or any other protuberance of any material other than rubber (or other resilient material) which projects beyond the tread of the traction surface of the tire, except that it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway and except also that it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety, because of snow, ice or other conditions tending to cause a vehicle to skid. It shall also be permissible to use upon any vehicle for increased safety, regular and snow tires with studs which projects beyond the read of the traction surface of the tire not more than one sixteenth on an inch when compressed.
South Dakota S.D. Codified Laws § 32-19-2 (2003) § 32-19-2. Cleated or spiked rolling surfaces prohibited — Farm machinery excepted — Tire chains excepted — Violation as petty offense. No tire on a vehicle moved on a highway may have on its periphery any 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 except that it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway and except also that it shall be permissible to use farm machinery with tires having protuberances which will not injure the highway and except also that it shall be permissible to use tire chains for reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to slide or skid. A violation of this law is a petty offense.
S.D. Codified Laws § 32-19-3.1 (2003) § 32-19-3.1. Vehicles restricted on state trunk highways during inclement weather — Violation as misdemeanor notwithstanding § 32-19-2, the secretary of transportation may restrict public travel upon any state trunk highway system to four-wheel drive vehicles or motor vehicles equipped with tire chains, studded snow tires or snow tires having a tread of sufficient abrasive or skid-resistant design or composition and depth to provide adequate traction on icy or snow-packed roads.
Tennessee 55-9-106. Studded tires (a) No person shall use a tire on a vehicle moved on a highway which has on its periphery any block, stud, flange, cleat, or spike or any other protuberances of a material other than rubber which project beyond the tread of the traction surface of the tire, except as otherwise provided in this section. (b) A person may operate on a highway a vehicle equipped with a tire which has imbedded in it wire or other material for improving traction on snow and ice during the period of October 1 through April 15 of each year. Such a tire shall be so constructed that the percentage of wire or other material in contact with the roadway does not exceed, after the first one thousand (1,000) miles of use or operation of any such tire, the wire or other material in contact with the roadway shall not exceed twenty percent (20%) of the total tire area in contact with the roadway. The studded tires allowed by this subsection (b) shall not be used at any time on a vehicle with a maximum gross weight of more than none thousand pounds (9,000 lbs.) , unless such a vehicle is a school bus or an emergency vehicle. (c) It is permissible to use tire chains of reasonable proportions on any vehicle when required for safety because of snow, ice, or other condition tending to cause a vehicle to skid.
Texas Tex. Transp. Code § 547.612 (2004) § 547.612. (c) A tire used on a moving vehicle may not have on its periphery a block, stud, flange, cleat or spike or other protuberance of a material other than rubber that projects beyond the tread of the traction surface, unless the protuberance: (1) does no injure the highway; or (2) is a tire chain of reasonable proportion that is used as required for safety because of a condition that might cause the vehicle to skid.
Utah Utah Code Ann. § 41-6-150 (2004) § 41-6-150. Tires which are prohibited — Regulatory powers of the state transportation department — Winter use of studs — Special permits — Tread depth (c) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, or spike or any other protuberances of any material other than rubber which project beyond the tread of the traction surface of the tire except as otherwise provided in this section. The state department of transportation may by regulation permit the use of tires on a vehicle having protuberances other than rubber when it concludes that they will not damage the highway significantly, or constitute a hazard to life, health or property. Notwithstanding anything to the contrary contained in this section or in any such regulation, it is permissible to use on a vehicle tires with protuberances consisting of tungsten carbide studs during the periods of October fifteenth through December thirty-first and January first through March thirty-first of each year if the tungsten carbide studs shall not project beyond the tread of the traction surface of the tire more than 0.050 inches; but tires bearing these tungsten carbide studs shall not be used at any time on a vehicle with a maximum gross weight in excess of 9,000 pounds unless the vehicle is an emergency vehicle or school bus, an emergency vehicle or scholl bus being allowed to use tires bearing these studs during these periods. It shall be permissible to use farm machinery with tires having protuberances which will not injure the highway, and also it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
Vermont  
Virginia Va. Code Ann. § 46.2-1044 (2004) § 46.2-1044. Cleats, etc., on tires; chains; tires with studs. No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat, spike, or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire. It shall be permissible, however, to use on the highways farm machinery having protuberances which will not injure the highway and to use tire chains of reasonable proportions when required for safety because of snow, ice, or other conditions tending to cause a vehicle to slide or skid. It shall also be permissible to use on any vehicle whose gross weight does not exceed 10,000 pounds tires with studs which project no more than on-sixteenth of an inch beyond the tread of the traction surface of the tire when compressed if the studs cover no more than three percent of the traction surface of the tire. The use of studded tires shall be permissible only from October 15 to April 15.
Va. Code Ann. § 46.2-1045 (2004) § 46.2-1045. Sale of tires having cleats, etc., prohibited; studded tires excepted. No person shall sell to any resident of the Commonwealth a tire which shall have on its periphery any block, stud, flange, cleat, spike, or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire. It shall also be permissible to sell studded tires whose use is permitted under provisions of this article. Violation of this section shall constitute a Class 1 misdemeanor.
Washington Rev. Code Wash. (ARCW) § 47.36.250. Dangerous road conditions requiring special tires, chains, or traction equipment — Signs or devices — Penalty. (Effective July 1, 2004.) (1) If the department or its delegate determines at any time for any part of the public highway system that the unsafe conditions of the roadway require particular tires, tire chains, or traction equipment in addition to or beyond the ordinary pneumatic rubber tires, the department may establish the following recommendations or requirement with respect to the use of such equipment for all persons using such public highway: (a) Traction advisory — oversize vehicles prohibited. (b) Traction advisory — oversize vehicles prohibited. Vehicles over 10,000 GVW — chains required. (ac) Traction advisory — oversize vehicles prohibited. All vehicles — chains required, except all wheel drive. (2) Any equipment that may be required by this section shall be approved by the state patrol as authorized under RCW 46.37.420. (3) The department shall place and maintain signs and other traffic control devices on the public highways that indicate tire, tire chain, or traction equipment recommendation or requirement determined under this section. Such signs shall in no event prohibit the use of studded tires from November 1st to April 1st, but when the department determines that chains are required and that no other traction equipment will suffice, the requirement is applicable to all types of tires including studded tires. The Washington state patrol or the department may specify different recommendation or requirements for four wheel drive vehicles in gear. (4) Failure to obey the requirement indicated under this section is a traffic infraction under chapter 46.63 RCW subject to a penalty of five hundred dollars including all statutory assessments.WAC 204-24-040 Traction devices. The following equipment items are approved by the state patrol for use as traction devices wherever traction devices are required by the department of transportation:(1) Tire chains meeting the standards in chapter 204-22 WAC.

Chapter 204-22 WAC
STANDARDS FOR TIRE CHAINS 
(Last update: 07/29/82)

WAC 204-22-010 Promulgation. By authority of RCW 46.37.005 and 46.37.420, the state commission on equipment hereby adopts the following standards for tire chains.

WAC 204-22-020 Scope. These standards shall apply to tire chains designed for and used upon a public roadway.

WAC 204-22-030 Link tire chains. (1) Link type tire chains consist of at least two chain loops, one on each side of the tire, connected by evenly-spaced metal cross chains across the tire tread.

(2) The National Association of Chain Manufacturers Tire Chain Specifications NACM-5179(TC) is hereby adopted by reference as the standard for link type tire chains.

WAC 204-22-040 Cable tire chains. This specification covers ladder-type cable tire chain assemblies designed for use on tires that have been manufactured in accordance with the standards of the Tire & Rim Association, Inc., 3200 West Market Street; Akron, Ohio 44313. All cable tire chains shall be designed for use on tires mounted in accordance with specifications in SAE Recommended Practice J1232, Class S, and SAE Informational Report J683a. Oversized tires, snow tires, special service, or special traction tires, etc., may require chains of a larger size.

(1) Classifications. Cable tire chains described in this specification shall be of the following types as specified for regular and restricted clearances:
(a) Passenger car
(b) Single light truck
(c) Heavy truck
(d) Special police and emergency vehicle

(2) Definitions. For purposes of this section, the following definitions shall apply:
(a) Cable laid rope. A compound laid rope consisting of several ropes or several layers of strands laid together into one rope.
(b) Side cable. Stranded cable to complete one full circumference along the tire sidewall.
(c) Fastener. Any suitable connecting device, secured to one end of a side cable so constructed that it can connect to the opposing end and be easily closed (engaged or fastened) and be readily opened (released) by hand.
(d) Reinforced cross cables. Stranded cable wrapped or covered to provide increased resistance to abrasive wear. This covering may be either a hard drawn spring wire, a high-carbon steel wire or nylon type 6 or 12. The wrapped or covered cable shall be enclosed by traction reinforcement sleeves covering said cable essentially from side connector to side connector. Cross cable shall be of specified length and shall provide proper drape over the tire tread.
(e) Cross cable fastener. Any suitable fastener used to attach each cross cable to the side cable. Fastener shall be constructed and assembled to prevent accidental detachment.
(f) Cross cable traction reinforcement sleeves. Shall be constructed of the manufacturer’s specified material and of suitable length and width to maximize traction, braking, cornering and longevity.

(3) Requirements.
(a) Components. Cable tire chain assemblies shall consist of two side cables, or two outer and one inner side cable with reinforced cross cables, cross cable fastener, and fasteners necessary to form a complete assembly.
(b) Material.
(i)Stranded side and stranded cross cable wire shall be constructed of preformed galvanized high-carbon steel with a minimum of 450 pound breaking strength with seven wires per strand and seven strands per cable. The lay shall be a right hand lay.
(ii) Wire covering stranded cable shall be constructed of high-carbon plow steel wire with a minimum tensile strength of 230,000 pounds per square inch.
(iii)Spring wire covering stranded cable shall be constructed of hard drawn spring wire with a minimum tensile strength of 200,000 pounds per square inch.
(iv)Cables, spring, and plow wire must be manufactured in conformance to SAE Recommended Practice J113.
(v) Cross cable fasteners shall be constructed of open hearth, electric furnace, or basic oxygen process steel.
(vi) Metallic cross cable traction reinforcement sleeves shall be constructed of open hearth, electric furnace, or basic oxygen process steel and shall comply with the following American Society for Testing Materials (ASTM) standards: Standard E6 – Bend Test, Standard E8 – Tension Test, Standard E18 – Test Methods for Rockwell Hardness, and Standard A568 – Table of Chemical Content of Steel.
(vii) Nonmetallic cross cable traction reinforcement sleeves shall be constructed of “Zytel” ST-801 nylon or its equivalent.
(viii) All side cable fasteners are to be constructed of material that will allow easy installation and removal.
(c) Spacing of cross cable. The first cross cable shall be attached to that point of each side cable nearest the fastener that will permit the fastener to lie in the proper plane when the assembled cable tire chain is applied to the tire. On single cable tire chains, the remainder of the cross cables shall be attached to the side cable at intervals designed to provide for at least one cross cable in contact with the roadway at all times. On dual-triple tire chains, the remainder of the cross cable shall be attached to the outer side cables at like intervals and to the inner side chain with opposing cross cables staggered at the same intervals.
(d) Tolerances
(i) Cross cable length. The inside length of all cross cable, including fasteners held in the same plane, shall be within a tolerance of minus 1/8 inch to plus 1/8 inch of the specified length indicated by the chain manufacturer’s specifications. The length shall be measured by hanging the cross cable vertically on a horizontal pin and measuring the inside to inside length. The number of traction reinforcement sleeves in a cross cable may not vary from the number specified by the manufacturer.
(ii) Side cable length. The length of all side cables shall be within tolerance of minus 1/8 inch to plus 1/2 inch of the length indicated by the chain manufacturer’s specifications.
(iii) Stranded cable size. Stranded cable size shall be subject to the following tolerances:
(A) Material up to and including .094 inch (2.4 mm) diameter shall not be less than the designated diameter and shall not exceed .010 inch (.25 mm) over the specified diameter.
(B) Material over .094 inch (2.4 mm) diameter shall not be less than the specified diameter and shall not exceed .014 inch (.36 mm) over the specified diameter.
(e) Component dimensions. The dimensions of manufactured components may vary, but the assembled cable chains must meet the tolerances specified in items (d)(i), (ii) and (iii).
(f) Finish. All cable tire chains shall have a rust-resistant finish for protection in transit and storage.
(g) Identification. Each half set of cable tire chains shall be permanently marked with the manufacturing company’s name, initials or trademark in order that it may be easily identified when not in the original container.

WAC 204-22-050 Other tire chain devices. From time to time, new technology or materials allow the invention or manufacture of devices having the same effect on a tire as tire chains but different in concept or design. Standards for such other tire chain devices shall be set by the commission upon petition by a party for approval of the device.

West Virginia W. Va. Code § 17C-15-37 (2003) § 17C-15-37. Tire equipment restrictions; rules and regulations as to certain tires (a) Every 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. (c) No tire on a vehicle moved on a highway shall have on its periphery any block, stud, flange, cleat or spike of any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that, (2) it shall be permissible to use tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid, and (3) it shall be permissible to use studded tires during the period from November first of each year until April fifteenth of the following year; Provided, That in the interest of highway maintenance, no vehicle moved on a highway, other than school buses, shall be equipped with studded tires which are operational with a recommended air pressure greater than forty pounds per square inch. (d) No studded tires or chains shall be sold or used within the State of West Virginia which do not meet the specifications established by the rules and regulations which the commissioner of highways shall promulgate, but the commissioner may not by those rules and regulations prohibit the use of studded tires or chains within the State. (e)The commissioner of highways and local authorities in their respective jurisdictions may in their discretion issue special permits authorizing the operation upon the highway of traction engines or tractors having movable tracks with transverse corrugations upon the periphery of such movable tracks or farm tractors or other farm machinery, the operation of which upon a highway would otherwise be prohibited under this chapter.
Wisconsin Wis. Stat. § 347.45 (2003) 347.45. Tire equipment. (1) All automobiles, motor trucks, motor buses, truck tractors, trailers, semitrailers and mobile homes when operated upon a highway shall be completely equipped with tires inflated with compressed air and all other motor vehicles when operated on a highway shall be equipped with tires of rubber or of some material or construction of equal resiliency. No person may operate on a highway any motor vehicle, trailer, semitrailer or mobile home having any metal tire in contact with the roadway, except that tire chains of reasonable proportions may be used when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid, and except as provided in sub. (2)(c)(2) No person shall operate on a highway any vehicle, including farm tractors, self-propelled farm implements, implements of husbandry, animal drawn vehicles and road machinery, if such vehicle has on the periphery of any of its tires any block, stud, flange, cleat, spike or other protuberance of any material other that rubber which projects beyond the tread of the traction surface of the tire, except that: (b) Tire chains of reasonable proportions may be used on any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid. (c) A pneumatic tire may have embedded in it wire or wire coils for improving traction on ice and snow, but such tire shall be so constructed that the per cent of wire or wire coils in contact with the roadway does not exceed, after the first 1,000 miles of use or operation, 5% of the total tire area in contact with the roadway. During the first 1,000 miles of use or operation of any such tire the wire or wire coils in contact with the roadway shall not exceed 20% of the total tire area in contact with the roadway. Tires equipped with tungsten carbide studs shall be limited in usage and design as follows: 1. The department shall, by rule, designate the times of year during which any type of tire described in this paragraph may be used. 2. Such tires may be used only on authorized emergency vehicles, school buses, vehicles used to deliver mail and automobiles with out-of-state registrations and then only if such automobile is in the course of passing through this state for a period of not more than 30 days. 3. Such studs shall not project more than one-eighth inch beyond the tread surface of the tire or recutting is an acceptable and safe practice, nor does this subsection apply to regrooving or recutting done in a tire recapping process.
Wyoming Wyo. Stat. § 31-5-956 (2003) § 31-5-956. Tires; restriction of travel under hazardous conditions (a) Every solid rubber tire on a vehicle shall have rubber on its entire traction surface at least one (1) inch thick above the edge of the flange of the entire periphery. (b) No person shall operate or move on any highway any motor vehicle, trailer or semitrailer having any metal tire in contact with the roadway. (c) No tire on a vehicle moved on a highway shall have on its periphery any protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that it shall be permissible to use (ii) Tire chains of reasonable proportions upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid; (iii) Pneumatic tires having studs designed to improve traction without materially injuring the surface of the highway. Pneumatic tires having studs must be approved by the superintendent. (d) The superintendent and local authorities in their respective jurisdictions may issue special permits authorizing the operation upon a highway of tractors having movable tracks with transverse corrugations upon the periphery of the movable tracks or farm tractors or other farm machinery, the operation of which upon a highway would otherwise be prohibited under this section. (e) Travel on a highway may be restricted to all wheel drive vehicles equipped with tire chains or adequate snow tires when the superintendent or his authorized representative determines that travel is sufficiently hazardous due to snow, ice or other conditions.