Home / Heavy Haul FAQ / How Wide Can You Haul Without a Permit?
Heavy Haul FAQ · Sourced from state DOTs
The federal 102-inch rule, how states apply it, and where escort requirements start once you go over.
Last verified: against official state sources.
Short answer
A load can be up to 8 ft 6 in (102 inches) wide without an oversize permit: federal rule 23 CFR 658.15 says no state may set a width limit of more or less than 102 inches on the National Network. Anything wider needs a state oversize permit, and states may grant those permits under the same rule.
The number
Federal law sets the width on the National Network (the Interstates and designated federal-aid highways). All 17 states we cover use 8 ft 6 in as their legal width; Arizona drops to 8 ft on restricted routes listed in its Table 4.
| State | Legal width (no permit) | Official source |
|---|---|---|
| Oregon | 8 ft 6 in | ODOT: Legal Vehicle Dimensions |
| Washington | 8 ft 6 in | WSDOT: Commercial vehicle permits |
| Idaho | 8 ft 6 in | Idaho Code 49-1010 |
| California | 8 ft 6 in | Caltrans: Transportation Permits |
| Nevada | 8 ft 6 in | NDOT: Over Dimensional Vehicles |
| Arizona | 8 ft 6 in (8 ft where restricted under ADOT Table 4) | 17 A.A.C. 6 (PDF) |
| Utah | 8 ft 6 in | UDOT: Legal Height, Width & Length |
| Montana | 8 ft 6 in | MDT 2026 Trucker's Handbook (PDF) |
| Wyoming | 8 ft 6 in | WHP: Commercial Carrier |
| Colorado | 8 ft 6 in | CDOT: Rules & Regulations |
| New Mexico | 8 ft 6 in | 18.19.8 NMAC (verify with the state) |
| Texas | 8 ft 6 in | TxDMV: Texas Size/Weight Limits |
| North Dakota | 8 ft 6 in | NDHP Policy 9-1 (PDF) |
| South Dakota | 8 ft 6 in | SD Handbook: Vehicle Size Regulations |
| Nebraska | 8 ft 6 in | NDOT: Legal Sizes and Weights (PDF) |
| Kansas | 8 ft 6 in | K.S.A. 8-1902 |
| Oklahoma | 8 ft 6 in | 47 O.S. 14-103 |
Source: 23 CFR 658.15 (width). Checked Oct 22, 2026.
Over the limit
By state
State guides: Oregon · Washington · Idaho · California · Nevada · Arizona · Utah · Montana · Wyoming · Colorado · New Mexico · Texas · North Dakota · South Dakota · Nebraska · Kansas · Oklahoma. Permit detail: Oregon · Washington · Idaho · California · Nevada · Arizona · Utah · Montana · Wyoming · Colorado · New Mexico · Texas · North Dakota · South Dakota · Nebraska · Kansas · Oklahoma.
Have a specific load? Request a quote or run it through the permit checker. Every load we book is permitted, escorted and routed for you.
Questions we get
8 ft 6 in, or 102 inches. Under 23 CFR 658.15, no state may set a width limit of more or less than 102 inches on the National Network.
Yes. Anything over 8 ft 6 in wide needs an oversize permit from each state on the route.
Yes, by permit. 23 CFR 658.15 lets states grant special use permits to vehicles wider than 102 inches.
On the National Network it is 102 inches. Some states set narrower limits on other routes, for example Arizona's 8 ft on restricted routes in ADOT Table 4.
It depends on the state. In the 17 states we cover, the first escort is required at widths ranging from over 11 ft (Washington two-lane) to over 16 ft (South Dakota Interstates).
Keep reading
Send the dimensions and lane. We handle permits, escorts and routing on CRST's network. Call (310) 989-6530.
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