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Posted Roads

Each spring, MaineDOT evaluates potential damage to state and state-aid highways and determines whether weight restrictions should be imposed to prevent damage due to freeze/thaw action. Many municipalities undertake similar evaluations and restrictions on local road systems.

Below are links to three useful maps. The Cumulative Thawing Index from the Northeast Regional Climate Center tracks freeze/thaw data throughout the posted roads season. The yellow and maroon bands indicate areas where the ground is beginning to thaw, and where roads may become vulnerable.

The other two maps will bring you to MaineDOT's Map Viewer with layers turned on specifically to show roads that are currently posted, and roads that are expected to be posted based off historical data.

Cumulative Thawing Index 
 

 

Current Posted Roads and Bridges
 

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View current postings
 

Roads That Will Be Posted
 

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View interactive map
 

Preserving Maine's Roads

Roads represent a major public investment that must withstand New England’s challenging weather. Spring weight restrictions help protect them during thawing conditions, when they are most fragile.

By properly caring for Maine’s roads when they are most vulnerable, we can reduce damage and preserve this important infrastructure for years to come.

Are you curious to learn more about the posted roads process? Watch our informational video explaining how roads can get damaged, who determines what roads get posted, how to post roads, and more.

 

Application

Locally Posted Roads

New Hampshire Posted Roads

Counties

Cities/Towns

All Maine towns and cities have the authority to post weight restrictions on local roads. However, municipalities have no authority to post state or state aid highways within their borders (whether inside the urban compact or not). All municipalities are invited to share their listings with MaineDOT so that we can host them on this page. 

Historical listings, also provided below, can still provide useful data to help predict future closures.

2026 Listings

Historical Listings

Tentatively Posted Roads

Cities and Towns that have removed the posted road designation.

Additional Information

Maine Statutes, Laws and Rules for posted roads are available on the "Resources" page

Chapter 308 Title 29-A M.R.S.A., Section 2395 (PDF)

Information on Heavy Loads and Local Roads in Maine

Maine State Statute Concerning Posted Roads

FAQs (PDF)

Helpful Climate Resources

Gray National Weather Service Caribou Nation Weather Service