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Michigan DOT Regulations for Oversize/Overweight Load Flags/Banners/Signs/Lights, Running Hours and Holiday Restrictions

For All State Regulations, See:

Michigan Oversize / Overweight Regulations

Running Hours and Holiday Restrictions

Permits are issued for daylight hours only (1/2 hour before sunrise and 1/2 hour after sunset, Monday through Friday. Permits shall not be issued for movement from 12:00 noon on the day preceding and continuing until daylight of the first day after the following holidays: New Year’s, Day Labor Day, Memorial Day, Thanksgiving Day, Independence Day, Christmas Day. Weekend movement is permitted for loads not exceeding 10' in width, 14' high, and 90' long. This allowance is similar to other bordering state's provisions and allows weekend movement all day on Saturday, and until 3:00 p.m. on Sunday. Mobile/modular homes are not eligible for weekend movement.

"Oversized Load" Banner Regulations and Requirements

“Oversize Load” signs required on front of vehicle and on rear of load for any overdimensional load.

Flag Requirements

Oversize loads require red or orange flags at least 18” square, displayed at each of the four corners of the vehicle or load, and additional flags shall be displayed at the widest point on each side of the load.

Warning Lights: Color and Placement

When rear overhang is 4′ or more, the extreme rear of the load must have a flag for daytime running, and a red light or lantern at night.

Source of Information:

Michigan MDOT FAQ-Commercial Vehicle Transport Permits,1607,7-151-9623_26662_26679_27267_48606-185333--,00.html

What is considered as "Oversized Load" in Michigan?

Dimensions: Width: 8' 6" (8' non-designated hwys) Height: 13' 6" Length: Truck-Semi-trailer 65' Legal Overhang: Front: 3', Rear: Any length up to legal max vehicle length (length greater that 4' must have12' red require flag (days) and red light/lantern (night time).

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