Oversize Permits 101 — What Every Broker Should Know

If you broker oversize freight, the permit stack is where good loads go wrong. A missed curfew, an expired permit, or a mismatch between the load and the permitted dimensions can park a truck for a day — and the broker is usually the last to find out.

The rate confirmation is not a permit

The rate con is the commercial agreement between you and the carrier: pickup, delivery, commodity, price, dates. It starts the trip, but it gives the truck no legal authority to move an oversize load. That authority comes from state-issued oversize/overweight permits — and a multi-state journey usually needs one for every state it crosses.

One trip, many permits, many rules

Each state issues its own permit with its own conditions:

• Permitted route — the exact roads the load is allowed to use. Deviating from it can void the permit.
• Travel hours — many states restrict oversize movement to daylight, and some prohibit weekend or holiday travel.
• Curfews — metro areas commonly ban oversize movement during rush hours. Houston, Atlanta, and Chicago curfews catch out-of-state drivers constantly.
• Escorts — beyond certain dimensions, states require pilot cars front, rear, or both; some require police escorts.
• Provisions — the fine print: flags, signs, lighting, axle configurations, bridge restrictions.

Five states can mean five different curfew windows and five different escort rules for the same load.

What to verify before the truck moves

1. Every state on the route has a permit — including pass-through states.
2. Permit dimensions match the actual load — length, width, height, and weight. A 12'6" load on a 12'0" permit is an illegal move.
3. Dates are valid — permits carry effective and expiration dates, often only a few days wide.
4. Curfews along the route — know when the load must be parked.
5. Escort requirements — booked and confirmed before pickup, not at the state line.

Why we built a workspace for this

Checking those five things means reading every permit PDF — and re-reading them every time the driver, dispatcher, or customer calls with a question. HeavyHaul Agent puts all the trip's permits in one shared workspace, extracts the dimensions and restrictions, warns about mismatches and expirations, and lets anyone on the trip ask questions in plain language. The official permit always remains the controlling document — but nobody should have to memorize it.