2007 Legislation
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SENATE BILL NO. 1133 – MV tires, retractable studs


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Bill Status

S1133.....................................................by TRANSPORTATION
MOTOR VEHICLES - TIRES - Amends existing law relating to motor vehicle
equipment to provide for year-round use of tires equipped with retractable
studs under specified conditions.
02/12    Senate intro - 1st rdg - to printing
02/13    Rpt prt - to Transp
02/28    Rpt out - rec d/p - to 2nd rdg
03/01    2nd rdg - to 3rd rdg
03/02    3rd rdg - PASSED - 35-0-0
      AYES -- Andreason, Bair, Bastian, Bilyeu, Broadsword, Burkett,
      Cameron, Coiner, Corder, Darrington, Davis, Fulcher, Gannon, Geddes,
      Goedde, Hammond, Heinrich, Hill, Jorgenson, Kelly, Keough, Langhorst,
      Little, Lodge, Malepeai, McGee, McKague, McKenzie, Pearce,
      Richardson, Schroeder, Siddoway, Stegner, Stennett, Werk
      NAYS -- None
      Absent and excused -- None
    Floor Sponsor - Hammond
    Title apvd - to House
03/05    House intro - 1st rdg - to Transp
03/07    Rpt out - rec d/p - to 2nd rdg
03/08    2nd rdg - to 3rd rdg
03/12    3rd rdg - PASSED - 67-0-3
      AYES -- Anderson, Andrus, Barrett, Bayer, Bedke, Bell, Bilbao, Black,
      Block, Bock, Boe, Brackett, Bradford, Chadderdon, Chavez, Chew,
      Collins, Crane, Durst, Edmunson, Eskridge, Hagedorn, Hart, Harwood,
      Henbest, Henderson, Jaquet, Killen, King, Kren, Labrador, Lake,
      LeFavour, Loertscher, Luker, Marriott, Mathews, McGeachin, Mortimer,
      Moyle, Nielsen, Nonini, Pasley-Stuart, Patrick, Pence, Raybould,
      Ring, Ringo, Roberts, Ruchti, Rusche, Sayler, Schaefer, Shepherd(2),
      Shepherd(8), Shirley, Shively, Smith(30), Smith(24), Snodgrass,
      Stevenson, Thayn, Vander Woude, Wills, Wood(27), Wood(35), Mr.
      NAYS -- None
      Absent and excused -- Bolz, Clark, Trail
    Floor Sponsor - Wood(35)
    Title apvd - to Senate
03/13    To enrol
03/14    Rpt enrol - Pres signed - Sp signed
03/15    To Governor
03/20    Governor signed
         Session Law Chapter 101
         Effective: 07/01/07

Bill Text

  ]]]]              LEGISLATURE OF THE STATE OF IDAHO             ]]]]
 Fifty-ninth Legislature                   First Regular Session - 2007
                                       IN THE SENATE
                                    SENATE BILL NO. 1133
                                BY TRANSPORTATION COMMITTEE
  1                                        AN ACT
  5    Be It Enacted by the Legislature of the State of Idaho:
  6        SECTION 1.  That Section 49-948, Idaho Code, be, and the  same  is  hereby
  7    amended to read as follows:
  8        49-948.  RESTRICTIONS AS TO TIRE EQUIPMENT. (1) Every solid rubber tire on
  9    a  vehicle  shall  have rubber on its entire traction surface at least one (1)
 10    inch thick above the edge of the flange of the entire periphery.
 11        (2)  No person shall operate or move on any  highway  any  motor  vehicle,
 12    trailer, or semitrailer having any metal tire in contact with the highway.
 13        (3)  No  tire  on a vehicle moved on a highway shall have on its periphery
 14    any block, stud, flange, cleat, spike, or any other protuberance of any  mate-
 15    rial other than rubber which projects beyond the tread of the traction surface
 16    of  the  tire,  except  as allowed herein. It shall be permissible to use farm
 17    machinery with tires having protuberances which will not injure  the  highway,
 18    and  it  shall  be permissible to use tire chains. Tires with built-in lugs of
 19    tungsten carbide or other suitable material, hereinafter called studs, may  be
 20    used  upon any vehicle when required for safety because of snow, ice, or other
 21    conditions tending to cause a vehicle to skid, that will not unduly damage the
 22    highway. Motor vehicles, trailers and semitrailers with tires having  built-in
 23    studs are prohibited on public highways between the dates of May 1 and Septem-
 24    ber  30,  annually,  except  as provided in paragraphs (a), and (b) and (c) of
 25    this subsection:
 26        (a)  Fire pumper/tanker trucks and ladder trucks belonging to fire depart-
 27        ments and firefighting agencies are exempt from the prohibited dates.
 28        (b)  A vehicle may be equipped year-round with tires that have retractable
 29        studs if the studs retract pneumatically or mechanically to  at  or  below
 30        the  wear  bar  of  the  tire  when  not  in use and the retractable studs
 31        protrude beyond the wear bar of the tire only between October 1 and  April
 32        30.  Retractable  studs may be made of metal or other material and are not
 33        subject to the stud weight requirements of subsection (4) of this section.
 34        (c)  Special exemptions from the prohibited dates may be  granted  by  the
 35        Idaho  transportation  board if it is found by the board that enhancements
 36        to public safety outweigh the increased pavement wear.
 37        (4)  Commercial tire retailers shall not sell  studded  tires  with  studs
 38    exceeding  the following weight and protrusion limitations after July 1, 2005.
 39    Commercial tire retailers and tire shops  shall  not  manually  install  studs
 40    exceeding the following weight and protrusion limitations after July 1, 2005.
 41        (a)  Studs  shall  not  protrude more than six-hundredths (.06) of an inch
 42        from the surface of the tire tread when originally installed.
 43        (b)  Stud size shall be as recommended by the manufacturer of the tire for
  1        the type and size of the tire.
  2        (c)  Studs shall individually weigh no more than one  and  one-half  (1.5)
  3        grams if the stud is size 14 or less.
  4        (d)  Studs  shall  individually  weigh  no  more than two and three-tenths
  5        (2.3) grams if the stud size is 15 or 16.
  6        (e)  Studs shall individually weigh no more than three (3)  grams  if  the
  7        stud size is 17 or larger.

Statement of Purpose / Fiscal Impact

                       STATEMENT OF PURPOSE

                             RS 16981

The purpose of this proposal is to allow new technology in
studded tires to be used in the state of Idaho. Currently any
tire with studs must be removed from use from April 15 to October
15. This change will allow a studded tire to be used throughout
the year on Idaho highways when the studs can be retracted below
the wear bar of the tire. This type of tire is safer for use and
will also lessen the wear and tear on the Idaho highways.

                           FISCAL NOTE

There is no fiscal impact to the general fund. Some long-term
savings could be realized by the Idaho Transportation Department.


Name: Senator John McGee 
Phone: 208-332-1000 or 208-332-1332

STATEMENT OF PURPOSE/FISCAL NOTE                        S 1133