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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.
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
MDOT determines when weight restrictions begin each spring by measuring frost depths along state highways, observing road conditions, and monitoring weather forecasts. Weight restrictions remain in effect until the frost line is deep enough to allow moisture to escape and the roadbeds regain stability. Weight restrictions are imposed and enforced on M, I, or US routes to protect roads.
MiTRIP - Overweight/Oversize 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.
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.
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.
The MDOT Permit Gateway (MPG) is the portal for ordering and renewing permits. For technical issues related to MPG passwords and login assistance, 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.
Rules and Guidelines
Restrictions and Conditions
Licensees and Forms
Ban on Hand Held Cellular Phones
Bridge Load Posting Processes and Practices
Federal Motor Carrier Safety Administration
Maximum Axle Loadings in Relation to Tire Size
Maximum Truck Loadings and Dimensions
Michigan's Truck-Weight Law & Truck User Fees
Moving Mobile Homes and Building Modules
Moving Oversize or Overweight Vehicles and Loads
D Bridge List - Extended Permit
MDOT Spring Weight Restrictions
Spring Weight Restrictions Map
MDOT Weight Restrictions Graphic
Michigan County Road Weight Restrictions
MDOT Construction Restrictions
Permit Conditions and Restrictions
UP Raw Forest Products - Permit Conditions and Restrictions
Human Trafficking Information
Michigan Health & Human Services
Homeland Security Blue Campaign