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47-12-405.


47-12-405.
   
   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
   motor vehicle, trailer or semitrailer having any metal tire in contact
   with the roadway, except when authorized by special permit as required
   by law.
   
   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:
   
   a. to use farm machinery with tires having protuberances which will
   not injure the highway,
   
   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, and
   
   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
   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 the 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.
   
   E. The Department of Public Safety and local authorities in their
   respective jurisdictions may in their discretion issue special permits
   authorizing the operation upon a 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 section.
   
   F. Every trailer, semitrailer or manufactured home shall be equipped
   with a coupling device which shall be so designed and constructed that
   the trailer, semitrailer or manufactured home will follow
   substantially in the path of the vehicle drawing it without whipping
   or swerving from side to side. In addition, every such trailer,
   semitrailer or manufactured home, except a semitrailer drawn by a
   truck-tractor type designed to draw or support the front end of a
   semitrailer, shall be coupled with:
   
   1. Stay chains or cables to the vehicle by which it is being drawn,
   which chains or cable shall be of sufficient size and strength to
   prevent parting from the drawing vehicle, should the regular coupling
   device break or become otherwise disengaged; or
   
   2. Chains or cables or a safety device which provides strength,
   security of attachment and directional stability equal to or greater
   than that provided by safety chains and which prevent parting from the
   drawing vehicle should the regular coupling device break or otherwise
   become disengaged. This device shall be designed, constructed, and
   installed so that if the tow-bar fails or becomes disconnected the
   tow-bar will not drop to the ground.
   
   G. No fuel tank or intake pipe on any motor vehicle shall project
   beyond the side of the motor vehicle. In no case shall the fuel tank
   or fuel intake pipe on any bus be located within or above the
   passenger-carrying portion of the bus.
   
   H. Any gasoline tank carried upon a motor vehicle, including any
   auxiliary tank, shall be of substantial construction, permanently
   attached to the motor vehicle in a manner similar to that which
   constitutes good practice in permanent installations.
   
   I. On every bus operating outside the corporate limits of
   municipalities, truck, or truck-tractor transporting persons or
   property for hire shall be at least one fire extinguisher with
   physical characteristics and fire extinguishing ability equivalent to
   or better than fire extinguishers which qualify under Classification
   "b" of the Standards of Underwriters Laboratories, Incorporated, or
   recognized testing laboratories. The extinguisher shall utilize an
   extinguishing agent which does not need protection from freezing and
   shall be properly filled and securely mounted in a bracket. The
   minimum size shall be one 4-pound carbon dioxide type (CO2), a 4-pound
   dry chemical, or extinguisher of other types having extinguishing
   capacity equivalent to any of these types, excluding carbon
   tetrachloride. If two extinguishers are used, they shall be of not
   less than two and one-half (2 1/2) pounds each. This requirement shall
   not apply to any bus having a seating capacity of eight or less
   persons or any drive-away, tow-away operations.
   
   J. Every bus which is licensed for the express purpose of transporting
   persons for hire, and having a seating capacity of ten or more
   persons, and operating outside the corporate limits of municipalities
   shall have at least one hand axe and one metal first-aid kit,
   heavy-duty, ten-unit size.
   
   K. All trucks, trailers, and other vehicles operating on the highways,
   except animal-drawn vehicles, not equipped with fenders over the
   rearmost wheels shall have attached thereto a rubber or fabric apron
   directly in rear of the rearmost wheels, and hanging perpendicular
   from the body of the vehicle. Said apron shall be of such a size as to
   prevent the bulk of the spray or other substances picked up from the
   roadway from being thrown on the windshield of a following vehicle and
   thereby obscuring the vision through the windshield of the driver of
   said vehicle. The provisions of this subsection shall not apply to a
   farm tractor moving over the state highway system at a speed less than
   twenty (20) miles per hour.
   
   L. Nothing in this section shall be construed as excepting commercial
   vehicles subject to the provisions of 49 CFR Subpart F, Coupling
   Devices and Towing Methods, from complying with the provisions
   thereof.
   

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