Overview
Wyoming oversize and overweight permits are issued by the Wyoming State Highway Department. Single-trip permits are usually valid for one trip with no day limit; return trips are not allowed.
Permit approval depends on the proposed route, dimensions, axle weights and Port-of-Entry authorization.
Permit Office
| Office | Wyoming State Highway Department |
| Address | 5300 Bishop Blvd., P.O. Box 1708, Cheyenne, Wyoming 82002-9019 |
| Contact | (307) 777-4376 |
| Hours | 8:00 A.M. – 5:00 P.M. (MT) |
Permit Basics
| Permit validity | Single-trip permits are usually valid for one (1) trip. There is no limit on the number of days. Returns are not allowed. |
| Operating time | 8:00 A.M. – 5:00 P.M. (MT) |
Dimensions & Weights
Routine permit limits
| Length | Port of Entry can approve up to 90′ on a single unit and up to 110′ on a combination unit |
| Width | Port of Entry can approve up to 18′ wide |
| Height | Port of Entry can approve up to 17′ high |
| Weight | Gross weight determined by axle configuration; anything over 150,000 lbs needs special approval |
| Axle / group | Spacing | Weight |
|---|---|---|
| Single | — | 25,000 |
| Tandem | — | 55,000 |
| Tridum | — | 65,000 |
| Quad | — | 74,000 |
| Trunnion | — | 55,000 |
Escort Requirements
| Based on | Escorts required |
|---|---|
| Width | On 2-lane highways — when any portion of vehicle extends to the left of the highway centerline: 2 (1 front & 1 rear) |
| Width | On 2-lane highways — width 14′ or more: 2 (1 front & 1 rear) |
| Width | On 2-lane highways — Wyoming Highway Patrol may require additional escorts at its discretion |
| Width | On interstate (4+ lanes) — width 15′ or more: 1 rear |
| Width | On interstate (4+ lanes) — additional escorts may be required by Wyoming Highway Patrol for extreme width |
| Length | On 2-lane highways — length 110′ or more: 2 (1 front & 1 rear) |
| Length | On interstate (4+ lanes) — length 110′ or more: 2 (1 front & 1 rear) |
| Height | On 2-lane highways — height 17′6″ or more: 1 front with height pole |
| Height | On interstate (4+ lanes) — height 17′6″ or more: 1 front with height pole |