Maryland Frost Laws & Spring Thaw Limits

How Maryland handles spring thaw

Maryland sets no seasonal spring weight restriction. The State Highway Administration does not reduce axle or gross limits for the thaw, so your 80,000-lb federal numbers hold year round on the Interstate and state highways (Md. Transp. Code § 24-101 et seq.). What can stop you is a posted bridge or road. A 'WEIGHT LIMIT X TONS' sign is short tons and overrides your legal weight, thaw or not. Check the Maryland SHA posted-structure list before you send a heavy load onto a county or local route.

Window, reduction, and where to check

• Season: No seasonal restrictions. Maryland declares no spring thaw window.
• Reduction: None. No seasonal reduction. Posted structures carry a fixed 'weight limit X tons' cap year round.
• Interstates: No seasonal limit on any road
• Find the current order: No seasonal order exists. Check Maryland MDOT State Highway Administration (SHA) posted-structure and hauling-permit information, and obey roadside 'weight limit' signs on local routes.
• Overweight penalty: Standard overweight fine. Maryland charges a graduated per-pound civil penalty, from 1¢ per pound on the first 1,000 lb over up to 40¢ per pound past 20,000 lb over, and a court may not suspend or reduce it (Md. Transp. Code § 24-401). A posted-structure violation is enforced separately.

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