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Compliance FAQ
Do I need a permit for an overweight load?
Yes. Any load above the federal maximum (80,000 lbs gross, 20,000 lbs single axle, 34,000 lbs tandem axle) requires an overweight permit from each state on the route. Some states have lower limits than federal - California permits anything over 80,000 lbs and limits axle loads more strictly. Pre-trip permitting is required; emergency overweight permits exist in some states with surcharge.
Reviewed by Korey Sharp-Paar · Updated
Why does it matter?
Federal maximums under 23 USC §127 are 80,000 lbs gross combination weight, 20,000 lbs on any single axle, and 34,000 lbs on any tandem-axle group. Vehicles operating in interstate commerce above any of these limits need a permit from each state on the route.
States can set lower limits. California limits tandem axles to 34,000 lbs but caps gross at 80,000 lbs without a permit; New York limits gross to 80,000 lbs but axle limits depend on the bridge formula. Each state has its own specific tables - there is no national one-size-fits-all chart.
The standard fee structure is per-trip permit. State DOTs typically charge $20-$80 per overweight permit, with weight-graduated multipliers (a load 5,000 lbs over the limit costs less than a load 50,000 lbs over). Heavy-haul carriers usually negotiate annual overweight permits where available.
Each state on the route requires its overweight permit for loads above its limits; the state agency enforces it. The permit has to be issued before the load moves.