Maine commercial vehicle weight limits follow the federal Interstate standard of 80,000 lbs gross, 22,400 lbs per single axle, and 38,000 lbs per tandem axle group. The federal bridge formula (23 U.S.C. 127) applies on all routes. Maine imposes strict spring weight restrictions typically February through May — among the longest and strictest in the US. Many secondary roads have winter postings that further restrict weights. Check Maine DOT for current restrictions — critical for Maine operations. Oversize and overweight permits are available from ME DOT for loads exceeding standard limits. Verify current road-specific postings with the Maine DOT before routing heavy loads.
Maine imposes strict spring weight restrictions typically February through May — among the longest and strictest in the US. Many secondary roads have winter postings that further restrict weights. Check Maine DOT for current restrictions — critical for Maine operations.
Check current restrictions at ME DOT →The federal bridge formula limits the weight on any group of axles based on the distance between the outermost axles in the group. It applies in Maine on all routes where federal standards apply.
W = maximum weight in lbs · L = axle spacing in feet · N = number of axles
Maine DOT issues oversize/overweight permits. Single-trip permits handle most one-time heavy hauls. Annual permits are available for qualifying recurring operations including timber haul. Superloads require route engineering review and pre-approval. Permit applications are available through Maine DOT. Note: spring posting period severely restricts permit issuance for secondary road movements February through May.
Apply for Maine OS/OW Permit →Maine allows 22,400 lbs single axle and 38,000 lbs tandem axle on designated state routes — higher than the federal standards of 20,000 and 34,000 lbs. These higher limits accommodate Maine's timber and agricultural industries. Interstate highways in Maine follow the federal limits. Tridem axles are allowed up to 54,000 lbs on qualifying routes.
Maine's spring weight restrictions typically run from February through May — among the longest restriction periods in the US. Restrictions are broadly applied to secondary and rural roads to protect frost-weakened road bases. Interstate highways are not restricted. Winter postings can impose additional restrictions outside the spring period. Check Maine DOT for current posting status before every secondary-road movement.
Maine oversize/overweight permits are issued by Maine DOT. Applications are available through the Maine DOT permit office. Single-trip permits handle most one-time heavy hauls. Annual permits are available for qualifying recurring operations. Note that permit issuance for secondary road movements is severely restricted during the spring posting period (typically February–May).
Yes. Maine's higher axle weight limits (22,400 lbs single, 38,000 lbs tandem) were designed in part to accommodate the logging and timber industry's standard haul configurations. Logging vehicles on designated forestry routes may qualify for additional weight allowances. However, spring restrictions still apply to logging operations on secondary roads — check current postings with Maine DOT.
Yes. Maine can post winter weight restrictions on secondary roads in addition to the spring thaw restrictions. Winter postings protect roads from frost damage and can be imposed year-round on certain secondary routes. Always check current Maine DOT road postings before routing on any non-Interstate road in Maine, regardless of season.
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The information on this page is compiled from publicly available government sources and is provided for general informational purposes only. TruckRadar is an independent search engine — we are not affiliated with any government agency and this content does not constitute legal or compliance advice. Regulations change frequently; always verify current requirements directly with the official source before making compliance decisions.
Official source: Maine ME Department of TransportationLast reviewed: 2026-04