Permit and Oversize Load Routing: What Changes From Standard Trucking

Fleet Navigation Guide · Independent guide · Affiliate disclosure

Standard truck routing, the kind covered in our truck route restrictions guide, assumes a legal-size load within normal dimensions. An oversize or overweight load changes the rules, often state by state.

What makes a load "oversize" or "permit"

Each state sets its own legal size and weight limits, and a load exceeding them needs a special permit to move on public roads. The thresholds and permit process differ by state, so a route crossing state lines can mean several separate permits with different requirements.

Why standard navigation isn't enough

• Permit routes are often specified in the permit itself. Some states issue a required route as part of the permit, which standard truck navigation has no way to know about.
• Escort and curfew requirements. Many states require pilot cars above certain dimensions, and some restrict oversize travel to daylight hours or ban it on weekends and holidays.
• Different clearance math. A route that's fine for a 13'6" truck can be wrong for a load that's actually 15 feet tall; the margin for error shrinks.

What to check before hauling a permit load

1. Confirm the permit requirements for every state on the route, not just the origin and destination.
2. Check whether the permit specifies a mandatory route.
3. Confirm escort and curfew requirements for the load's actual dimensions.
4. Re-verify clearances along the specific route; don't assume standard truck-safe routing covers oversize dimensions.

This guide is general information, not a substitute for checking each state's current permit rules, which change and vary by load type.

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