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where W equals overall gross weight on any group of two or more consecutive axles to the nearest <br />500 pounds, L equals distance in feet between the extreme of any group of two or more consecutive <br />axles, and N equals number of axles in group under consideration, except that two consecutive sets <br />of tandem axles may carry a gross load of 34,000 pounds each, providing the overall distance <br />between the first and last axles of such consecutive sets of tandem axles is 36 feet or more; <br />provided, however, that such overall gross weight may not exceed 80,000 pounds, including all <br />enforcement tolerances. <br />(2) No commercial motor vehicle shall have a greater weight than 600 pounds per inch width of <br />tire upon any wheel concentrated upon the surface of the highway and using high-pressure <br />tires, and a greater weight than 650 pounds per inch width of tire upon any wheel <br />concentrated upon the surface of the highway and using low-pressure tires, and no wheel shall <br />carry a load in excess of 8,000 pounds on high-pressure tires and 10,000 pounds on low- <br />pressure tires, nor any axle a load in excess of 16,000 pounds on high-pressure tires, and <br />20,000 pounds on low-pressure tires. <br />(3) Nothing in this section shall be construed as permitting size or weight limits on the national <br />system of interstate and defense highways within the corporate limits of the city in excess of <br />those permitted under 23 USC 127. If the federal government prescribes or adopts vehicle <br />size or weight limits greater than those prescribed by 23 USC 127 for the national system of <br />interstate and defense highways, the increased limits shall become effective on the national <br />system of interstate and defense highways within the corporate limits of the city. <br />(4) In this section, an axle load is defined as the total load transmitted to the road by all wheels <br />whose centers may be included between two parallel transverse vertical planes 40 inches <br />apart, extending across the full width of the vehicle. Tandem axle group is defined as twoor <br />more axles spaced 40 or more inches apart from center to center, having at least one common <br />point of weight suspension. <br />(5) Any weight enforcement officer, having reason to believe that the gross weight or axle load of <br />a loaded motor vehicle is unlawful, is authorized to weigh the vehicle by means of portable or <br />stationary scales approved by the police department of the city for such use, or the weight <br />enforcement officer may cause the loaded motor vehicle to be weighed by any public weigher <br />and may require such vehicle to be driven to the nearest available scales for the purpose of <br />weighing. If the gross weight of a vehicle weighed pursuant to this subsection, is found to <br />exceed the maximum gross weight authorized by law, plus a tolerance allowance of five <br />percent of the gross weight authorized by law, such weight enforcement officer shall demand <br />and require the operator or owner of the motor vehicle to unload, or cause to be unloaded, <br />such portion of the load as is necessary to decrease the gross weight of such vehicle to the <br />maximum permitted by law, plus such tolerance allowance. Such vehicle may not be operated <br />further over the public streets and highways within the city until the gross weight of the <br />vehicle has been reduced to a weight not in excess of the maximum authorized by law plus <br />such tolerance allowance, except as authorized under this subsection. If the axle load of a <br />vehicle weighed pursuant to this subsection, is found to exceed the maximum authorized by <br />law, plus a tolerance allowance of five percent of the axle load authorized by law, such <br />weight enforcement officer shall demand and require the operator or owner of the motor <br />9 <br /> <br /> <br />