Methodology

Heavy Haul Rules is a reference for the people who plan over-dimensional freight: dispatchers, permit staff, brokers and shippers. Its only job is to state each state's oversize and overweight rules accurately and show where each rule comes from.

Sources

Every figure on a state page is taken from one of two kinds of source: the state's permit office (its official pages, FAQs and fee schedules) or the state's statutes and administrative code. Industry summaries, pilot car company pages and permit service blogs are not used as sources, because they are often out of date. Each state page lists its sources, and Pro results show them next to every result.

What "verified" means

A state is published only after its legal limits, escort thresholds, travel restrictions, superload limits and fees have each been read from the sources above. All 48 contiguous states have been through this process.

Re-checking

Each state's official sources are re-read on a rolling schedule and whenever a user reports a change. When a rule changes, the state's page and the checker are updated together from the same data file and the verified date is reset. Changes are recorded on the corrections page.

How to read the checker

The checker applies each state's thresholds to the dimensions you enter. It tells you whether a permit is required, which escort rules apply, which travel restrictions apply at that size, and whether the load crosses a superload threshold. It does not know your route, so it cannot account for posted bridges, construction, county roads or permit-specific conditions. Treat it as the first pass, and the permit as the final word.

Limits of this reference

This site is not a permit, not a permit service and not legal advice. State rules change, and permits add route-specific conditions. Confirm with the state permit office or your permit service before a move. If you find an error, report it; corrections are made promptly and logged.