{"data":{"id":"us-wy/wyo.-stat.-31-18-802","jurisdiction":"us-wy","citation":"Wyo. Stat. § 31-18-802","heading":"General requirements.","body":"(a) All vehicles operated on the highways of this state shall comply with the following:\n(i) Width-all highways:\n(A) No vehicle, unladen or with load or load-holding device thereon shall exceed one hundred two (102) inches in width. Notwithstanding the foregoing, appurtenances on noncommercial motor homes, house trailers and truck campers may exceed one hundred two (102) inches in width if they extend no further than the exterior rear view mirrors of the motor home, tow vehicle or pickup truck, in the case of a truck camper, provided such mirrors only extend the distance necessary to provide the required field of view for the vehicle before the appurtenances were attached.\n(ii) Height-all highways:\n(A) No vehicle, unladen or with load or load-holding devices thereon, shall exceed fourteen (14) feet in height.\n(iii) Notwithstanding paragraphs (i) and (ii) of this subsection, implements and produce of husbandry of greater widths or greater heights may be moved in agricultural operations during daylight hours, without a permit or fee, but subject to and in accordance with regulations promulgated by the department for the protection of persons, property, highways and bridges. Regarding movement of implements of husbandry not exceeding sixteen (16) feet in width or height, the rules and regulations shall:\n(A) Not require the use of escort vehicles provided the implement is kept to the right of the center line;\n(B) Require the display of an oversize vehicle sign and warning lights as approved by the department.\n(iv) Length-all highways, except as provided in 31-18-803(a):\n(A) No combination of vehicles shall consist of more than three (3) single vehicles. No single vehicle shall have an overall length in excess of sixty (60) feet;\n(B) In a truck-tractor semitrailer combination, no semitrailer shall exceed sixty (60) feet in length. In a truck-tractor, semitrailer, trailer combination or truck-tractor double semitrailer combination, the length of the semitrailer shall not exceed forty-eight (48) feet and the length of the trailer or second semitrailer shall not exceed forty (40) feet. The combined length of the semitrailer and trailer or semitrailer shall not exceed eighty-one (81) feet including connecting mechanisms. For any other combination of vehicles the overall length shall not exceed eighty-five (85) feet;\n(C) In a truck-tractor, semitrailer, trailer or double semitrailer combination, the heavier towed vehicle shall be directly behind the truck-tractor and the lighter towed vehicle shall be last if the weight difference between consecutive towed vehicles exceeds five thousand (5,000) pounds.\n(v) Weights:\n(A) The wheels of all vehicles except those operated at a speed of less than ten (10) miles per hour shall be equipped with pneumatic tires;\n(B) No wheel equipped with solid tires shall carry a load in excess of eight thousand (8,000) pounds;\n(C) No wheel shall carry a load in excess of ten thousand (10,000) pounds. No tire on a steering axle shall carry a load in excess of seven hundred fifty (750) pounds per inch of tire width and no other tire on a vehicle shall carry a load in excess of six hundred (600) pounds per inch of tire width. \"Tire width\" means the width stamped on the tire by the manufacturer;\n(D) No single axle shall carry a load in excess of twenty thousand (20,000) pounds;\n(E) No tandem axle shall carry a load in excess of thirty-six thousand (36,000) pounds and no one (1) axle of any group of two (2) consecutive axles shall exceed the weight permitted on a single axle;\n(F) No triple axle, consisting of three (3) consecutive load bearing axles that articulate from an attachment to the vehicle including a connecting mechanism or variable load suspension axle to keep all axles at or below legal limits, having a spacing between the first and third axles greater than ninety-six (96) inches and not more than one hundred two (102) inches, shall carry a load in excess of forty-two thousand (42,000) pounds;\n(G) Subject to the limitation imposed by the axle load, no vehicle or combination of vehicles shall be operated on the interstate or national defense highways exceeding the maximum weight allowed under federal law and unless in compliance with Table I corresponding to a distance in feet between the extremes of any axle groups measured longitudinally to the nearest foot except that vehicles with two (2) consecutive sets of tandem axles may carry a gross load of thirty-six thousand (36,000) pounds each if the distance between the first and last axles of the consecutive sets of tandem axles is thirty-six (36) feet or more;\n(H) Vehicles operating on primary and secondary highways may operate in accordance with Table I or Table II at the discretion of the operator as follows:\n(I) For vehicles operating under gross weight Table I, the total gross weight in pounds imposed on the highway by any group of two (2) or more consecutive axles on a vehicle or combination of vehicles shall not exceed the value given in gross weight Table I, corresponding to a distance in feet between the extremes of any axle groups measured longitudinally to the nearest foot except that two (2) consecutive sets of tandem axles may carry a gross load of thirty-six thousand (36,000) pounds each if the distance between the first and last axles of the consecutive sets of tandem axles is thirty-six (36) feet or more;\n(II) For vehicles operating under the provisions of gross weight Table II, the total gross weight in pounds imposed on the highway by a vehicle or combination of vehicles shall not exceed the value given in gross weight Table II, corresponding to the distance in feet between the extremes of the vehicle or combination of vehicles measured longitudinally to the nearest foot;\n(III) Vehicles with two (2) consecutive sets of tandem axles with a distance of less than twenty-two (22) feet between the first and last axles of the consecutive sets shall comply with gross weight Table I.\n(J) A variable load suspension axle shall produce a distribution of weight to prevent an axle or axle group from exceeding allowable weights as specified in this paragraph. Dummy axles shall not be considered in the determination of allowable weights;\n(K) The following general formula is applied in preparing gross weight Table I:\nW=500[LN/(N - 1) + 12N + 36]\n     Where:    W = overall gross weight on any group of two (2)\nor more consecutive axles to the nearest five hundred (500)\npounds.\nL = distance in feet between extremes of any group of two (2) or more consecutive axles.\nN = number of axles in the group under consideration.\n(vi) GROSS WEIGHT TABLE I\n____________________________________________________________\nDistance in feet    Maximum gross weight in pounds\nbetween the extremes (2) or   carried on any group of two\nof any group of two (2) more consecutive axles\nor more consecutive\naxles\n____________________________________________________________\n2    3    4    5    6    7    8    9 or\nmore\naxles     axles     axles     axles     axles     axles\n     axles     axles\n________________________________________________________________\n4    36,000\n5    36,000\n6    36,000\n7    36,000\n8    36,000    42,000\n9    39,000    42,500\n10   40,000    43,500\n11        44,000\n12        45,000    50,000\n13        45,500    50,500\n14        46,500    51,500\n15        47,000    52,000\n16        48,000    52,500    58,000\n17        48,500    53,500    58,500\n18        49,500    54,000    59,000\n19        50,000    54,500    60,000\n20        51,000    55,500    60,500    66,000\n21        51,500    56,000    61,000    66,500\n22        52,500    56,500    61,500    67,000\n23        53,000    57,500    62,500    68,000\n24        54,000    58,000    63,000    68,500    74,000\n25        54,500    58,500    63,500    69,000    74,500\n26        55,500    59,500    64,000    69,500    75,000\n27        56,000    60,000    65,000    70,000    76,000\n28        57,000    60,500    65,500    71,000    76,500\n     82,000\n29        57,500    61,500    66,000    71,500    77,000\n     82,500\n30        58,500    62,000    66,500    72,000    77,500\n     83,000\n31        59,000    62,500    67,500    72,500    78,000\n     83,500\n32        60,000    63,500    68,000    73,000    78,500\n     84,500    90,000\n33             64,000    68,500    74,000    79,000    85,000\n     90,500\n34             64,500    69,000    74,500    80,000    85,500\n     91,000\n35             65,500    70,000    75,000    80,500    86,000\n     91,500\n36   Two (2)\nconsecutive    66,000    70,500    75,500    81,000\n86,500    92,000\n37   sets of\ntandem         66,500    71,000    76,000    81,500\n87,000    93,000\n38   axles\nmay carry 67,500    72,000    77,000    82,000    87,500\n93,500\n39   36,000\npounds         68,000    72,500    77,500    82,500\n88,500    94,000\n40   each if\nthe       68,500    73,000    78,000    83,500    89,000\n94,500\n41   distance\nis 36          69,500    73,500    78,500    84,000\n89,500    95,000\n42   feet or more   70,000    74,000    79,000    84,500\n     90,000    95,500\n43   between\nthe       70,500    75,000    80,000    85,000    90,500\n96,000\n44   consecutive\nsets      71,500    75,500    80,500    85,500    91,000\n96,500\n45   of tandem\naxles          72,000    76,000    81,000    86,000\n91,500    97,500\n46             72,500    76,500    81,500    87,000    92,500\n     98,000\n47             73,500    77,500    82,000    87,500    93,000\n     98,500\n48             74,000    78,000    83,000    88,000    93,500\n     99,000\n49             74,500    78,500    83,500    88,500    94,000\n     99,500\n50             75,500    79,000    84,000    89,000    94,500\n     100,000\n51             76,000    80,000    84,500    89,500    95,000\n     100,500\n52             76,500    80,500    85,000    90,500    95,500\n     101,000\n53             77,500    81,000    86,000    91,000    96,500\n     102,000\n54             78,000    81,500    86,500    91,500    97,000\n     102,500\n55             78,500    82,500    87,000    92,000    97,500\n     103,000\n56             79,500    83,000    87,500    92,500    98,000\n     103,500\n57             80,000    83,500    88,000    93,000    98,500\n     104,000\n58                  84,000    89,000    94,000    99,000\n     104,500\n59                  85,000    89,500    94,500    99,500\n     105,000\n60                  85,500    90,000    95,000    100,500\n     105,500\n61                  86,000    90,500    95,500    101,000\n     106,000\n62                  87,000    91,000    96,000    101,500\n     107,000\n63                  87,500    92,000    97,000    102,000\n     107,500\n64                  88,000    92,500    97,500    102,500\n     108,000\n65                  88,500    93,000    98,000    103,000\n     108,500\n66                  89,000    93,500    98,500    104,000\n     109,000\n67                  90,000    94,000    99,000    104,500\n     110,000\n68                  90,500    95,000    99,500    105,000\n     110,500\n69                  91,000    95,500    100,000   105,500\n     111,000\n70                  92,000    96,000    101,000   106,000\n     111,500\n71                  92,500    96,500    101,500   106,500\n     112,000\n72                  93,000    97,000    102,000   107,000\n     112,500\n73                  93,500    98,000    102,500   107,500\n     113,000\n74                  94,500    98,500    103,000   108,500\n     113,500\n75                  95,000    99,000    104,000   109,000\n     114,000\n76                  95,500    99,500    104,500   109,500\n     115,000\n77                  96,000    100,000   105,000   110,000\n     115,500\n78                  97,000    101,000   105,500   110,500\n     116,000\n79                  97,500    101,500   106,000   111,000\n     116,500\n80                  98,000    102,000   106,500   111,500\n     117,000\n81                  98,500    102,500   107,000   112,000\n82                  99,000    103,000   108,000   113,000\n83                  100,000   104,000   108,500   113,500\n84                       104,500   109,000   114,000\n85                       105,000   109,500   114,500\n86                       105,500   110,000   115,000\n87                       106,000   111,000   115,500\n88                       107,000   111,500   116,000\n89                       107,500   112,000   117,000\n90                       108,000   112,500\n91                       108,500   113,000\n92                       109,000   113,500\n93                       110,000   114,000\n94                       110,500   115,000\n95                       111,000   115,500\nor more\n(vii) GROSS WEIGHT TABLE II\nPRIMARY AND SECONDARY HIGHWAYS\nDistance in feet between the\nextremes of the first and           Maximum gross\nlast axle of any vehicle              weight in\nor combinations of vehicles             pounds\n10                            43,500\n11                            45,000\n12                            48,000\n13                            50,000\n14                            52,000\n15                            54,000\n16                            54,000\n17                            54,000\n18                            56,000\n19                            58,000\n20                            62,000\n21                            64,000\n22                            65,000\n23                            66,000\n24                            66,000\n25                            66,000\n26                            66,000\n27                            66,000\n28                            66,000\n29                            66,000\n30                            67,000\n31                            68,000\n32                            69,000\n33                            70,000\n34                            71,000\n35                            72,000\n36                            73,000\n37                            74,000\n38                            75,000\n39                            76,000\n40                            76,000\n41                            76,000\n42                            76,000\n43                            76,000\n44                            76,000\n45                            77,000\n46                            77,400\n47                            78,300\n48 or more                    80,000\n(viii) The director may reduce the maximum allowable axle loads and gross weight limits for specific highways or sections thereof or for bridges under his jurisdiction if the continued operation of vehicles or combinations of vehicles would create undue damage to the highways or bridges. Any person owning or operating a vehicle or combination of vehicles in violation of reduced load limits when posted or otherwise appropriately marked is liable for damage to the highway or bridge in question in addition to the penalties provided by law;\n(ix) There is no obligation on the state to heighten any bridge, tunnel or other structure on highways because of the provisions of this act. The director may reduce the size and weight limits of vehicles and loads on state and federal highways if, in his discretion, road conditions require;\n(x) A board of county commissioners may by resolution adopt any or all of the provisions of this act to apply to county roads under their jurisdiction. The sheriff shall have enforcement authority on county roads under W.S. 31-18-805 for provisions adopted.","path":["TITLE 31 - MOTOR VEHICLES","CHAPTER 18 - COMMERCIAL VEHICLES","ARTICLE 8 - SIZE AND WEIGHT LIMITS"],"source_url":"https://wyoleg.gov/statutes/compress/title31.pdf","current_through":"2026 Budget Session; as of 2026-07-01","vintage":"","retrieved_at":"2026-09-04T00:16:32Z","sha256":"d3bdc9aa20b4922e5731849c3edc1a33788ddbf732c6cf068b70dead0118caef","source_id":"us-wy","stale":false,"prev":"us-wy/wyo.-stat.-31-18-801","next":"us-wy/wyo.-stat.-31-18-803"},"notice":"GroundRules: Original legal text. Not legal advice."}