overweightpermit

An overweight permit is a government-issued authorization that allows a vehicle or combination of vehicles to operate on public roads with a gross vehicle weight, axle load, or dimensions that exceed standard legal limits. These permits cover overweight loads and often oversized (exceeding width, height, or length) loads, and may be issued for a single trip or on an annual basis. In many jurisdictions, separate permits exist for unusual configurations.

Regulatory authority varies by country and region; in the United States, state departments of transportation issue overweight permits, often with mileage limits and time windows. Canada relies on provincial authorities; Europe uses national systems for OS/OW movements.

Application and approval usually require a route survey, proof of load dimensions, vehicle configurations, and safety plans. Fees apply, and permits may require escorts or pilot cars, warning signs, and lighting. Some routes are restricted by time, weather, or season.

Compliance is mandatory; drivers must follow all restrictions, observe bridge load limits, and stay on approved routes. Violations can bring fines, permit suspension, and liability for damage to infrastructure.

Permits enable transport of heavy equipment and excessive loads for construction and industry, but they add planning time, cost, and scheduling constraints.