Oversize, Overweight & Superload Permits
Oversize, overweight, and superload permits sit on a spectrum of regulatory burden. A standard oversize move (e.g. 13-foot wide load) may permit-clear in a few hours; a superload (over 16 feet wide or 200,000 lbs combined) can take weeks of route engineering and bridge analysis.
Oversize covers loads that exceed the state's legal length, width, or height limits. Width over 8'6" is the most common trigger; height over 13'6" is the second. Most states issue oversize permits same-day for $20-$60 and require basic flag/banner / chase-vehicle compliance.
Overweight covers loads exceeding the state's legal axle, group, or gross weight limits. Permits factor in route stress on bridges and pavement. State engineers review proposed routes and may require alternate roads or specific axle configurations.
Superload is the heaviest tier — typically loads over 16' wide, 100' long, or 200,000 lbs combined. Each state's threshold differs slightly. Superloads require route engineering, bridge analysis, escort plans, and sometimes police escort. Permits can take 1-4 weeks.
The cluster below covers the qualifying thresholds in each state, the typical fee schedules, and how to plan a multi-state superload that has to clear several state engineering reviews in sequence.
Articles in this cluster
- Oversize and Overweight Permits by State: 2026 Reference
Oversize and overweight (OS/OW) permits are issued by each state DOT for loads that exceed federal limits. Compare the top 10 states' programs, dimensions, escort rules, and routing.
State Permits · 9 min read · Updated 2026-05-02
- Single-Trip vs Superload Permits: Heavy Haul Reference (2026)
Single-trip oversize permits cover routine over-dimensional loads through one or several states. Superload permits cover the largest loads, with engineering review and police escorts required.
State Permits · 8 min read · Updated 2026-05-02
- Fuel Permits Explained: IFTA License vs Trip-Fuel Permits (2026)
IFTA harmonizes fuel-tax reporting across 48 U.S. states and 10 Canadian provinces. Trip-fuel permits cover one-off crossings for non-IFTA vehicles. Learn how each works and when to file.
State Permits · 8 min read · Updated 2026-05-02