HB 4343 — Traffic control: violations; certain trucks assisting in a state of emergency; exempt from frost laws. Amends sec. 722 of 1949 PA 300 (MCL 257.722).

HB-4343, As Passed House, May 21, 2025 HOUSE BILL NO.

(a) If the axle spacing is 9 feet or more between axles, the maximum axle load must not exceed 18,000 pounds for vehicles JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu equipped with high pressure pneumatic or balloon tires.

(4) Notwithstanding subsection (3), on a combination of truck tractor and semitrailer having not more than 5 axles, 2 consecutive sets of tandem axles may carry a gross permissible weight of not to exceed 17,000 pounds on any axle of the tandem axles if there is no other axle within 9 feet of any axle of the tandem axles and if the JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu first and last axles of the consecutive sets of tandem axles are not less than 36 feet apart and the gross vehicle weight does not exceed 80,000 pounds to pick up and deliver agricultural commodities between the national truck network or special designated highways and any other highway.

JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu (6) The seasonal reductions described under subsection (8) to the loading maximums and gross vehicle weight requirements of subsection (12) do not apply to public utility vehicles under the following circumstances:

The seasonal truck permit must contain all JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu of the following:

Notwithstanding this subsection or an agreement under this subsection, if the county road commission determines JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu that the condition of a particular road under its jurisdiction makes it unusable, the county road commission may deny access to all or any part of that road.

The maximum wheel load JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu must not exceed 525 pounds per inch of tire width on concrete and concrete base or 450 pounds per inch of tire width on all other roads during the period the seasonal road restrictions are in effect.

Approval or denial of a request for an exemption must be given by written JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu notice to the applicant within 30 days after the date of submission of the application.

JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu (12) The loading maximum in this subsection applies to interstate highways, and the state transportation department, or a local authority with respect to highways under its jurisdiction, may designate a highway, or a section of a highway, for the operation of vehicles having a gross vehicle weight of not more than 80,000 pounds that are subject to the following load maximums:

As used in this subsection, "tandem axle weight" means the total weight transmitted to the road by 2 or more consecutive axles, the centers of which may be included JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu between parallel transverse vertical planes spaced more than 40 inches but not more than 96 inches apart, extending across the full width of the vehicle.

A vehicle or combination of vehicles described in this subsection may exceed the axle loading maximums under subsections (1), (2), (3), and (4) and the weight load maximums under JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu subsection (12) by a total of not more than 2,000 pounds for all axles of the truck, truck tractor, or power unit.

(i) An edifice, silo, tank, bin, crib, interstice, or protected enclosed structure, or more than 1 edifice, silo, tank, bin, crib, interstice, or protected enclosed structure located contiguous to JJR H02821'25_HB4343_INTR_1H02821'25_HB4343_APH_1 jgcu8tbgspzu each other.

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