CostWhat each state DOT actually charges for a single-trip OS/OW permit — all 48, and why thirteen of them cannot be reduced to one number. Searchable, sortable, every figure dated and linked to its source.
- Flat-rate states, low to high
- $6 – $75
New Hampshire is lowest at $6, Ohio highest at $75. Thirteen states do not use a flat rate at all — they price on weight, width, envelope or distance.
WeightGross, single, tandem, tridem and quad for all 48, the bridge formula worked through, and the two states where the legal gross rises with the axle count — Michigan reaches 164,000 lbs at eleven. Plus what each state charges to go over.
RulesThe federal baseline is 8'6" wide, 13'6" high, 53' trailer and 80,000 lbs — but that height figure is only right in about half the country. Where states go stricter, and the divisible-load rule that gets drivers ticketed.
EscortsEscort rules are a function of dimension and road tier — the same load can need a front escort on a two-lane and a rear escort on a multilane. Plus night, weekend and holiday blackouts.
RulesThere is no federal definition — each state sets its own trigger, and they range from 14 to 18 feet wide. All 48 states’ triggers on width, height, length and weight, plus the 26 published review windows.