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A semi truck traveling westbound I-196 in Allegan County.
Department of Transportation


As Michigan's economy continues to grow over the next few years, trucking will remain an important piece in our transportation network.

To ensure infrastructure and motorist safety, our truckers page provides all the necessary rules, guidelines, restrictions, and permits, needed to safely transport goods throughout Michigan.

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MDOT's Truck Operators Map shows the current all-season and seasonal truck routes. 

View Truck Operators Map

Trucking Contacts

FMCSA - Michigan Division

Intrastate Operating Authority
517-284-3250, option 4 then option 1

Commercial Driver's License (CDL)

Michigan Trucking Association (MTA)

Spring Weight Restrictions

Effective 6 a.m. Monday, April 15, MDOT's seasonal weight restrictions on all state trunkline highways in the entire state of Michigan will be lifted. State routes typically carry M, I, or US designations.

Weight restrictions are implemented during the spring frost thaw period and are now completed for the 2024 season.

County road commissions and city public works departments put in place their own seasonal weight restrictions, which usually, but not always, coincide with state highway weight restrictions. Signs are generally posted to indicate which routes have weight restrictions in effect.

MiTRIP -Oversize/Overweight Permits

The Michigan Transport Routing and Internet Permitting System (MiTRIP) allows applicants to order oversize/overweight single trip and extended permits to travel on state and federal highways in Michigan. Registration must be done through MPG using a credit/debit card or electronic fund transfer (e-Check, business check) with bank accounts in the United States.

More information on Oversize/Overweight Permits

MPG/MiTRIP Registration Instructions

Existing Business and Permit Services

Business with Existing Extended Permits
Once a company is registered, Delegated Business Authority can be used to give access to all other users in the company.

User Guides

Single Trip Permit

Extended Trip Permit

Clearing Temporary Internet Files and Session Cookies

For general permit questions, contact 517-241-8999 and select option 2.

Transport Permit Forms

A truck traveling on the 36th Street ramp at I-96 near the Gerald R. Ford International Airport.

Permit Gateway

MDOT Permit Gateway (MPG) is the portal for ordering/renewing permits.

For technical issues related to MPG passwords and logins, call 844-806-0002.

Know the Height of Your Load

Vehicle/bridge collisions result in serious injuries, significant property damage, and major congestion problems.

Permits are required for objects or vehicles over 13' 6" in height.

Questions? Contact your local county road commission or MDOT Permits Unit at 517-241-8999.

Know the Height of Your Load Poster

Trucker Information