...
All loads over legal size or weight limits must have prior approval. Loads without prior approval are subject to a citation.
Permits are obtained at the ports of entry or highway shops for oversize/overweight loads within the following size limits:
| Size/Weight Condition | Limit |
|---|---|
| For sizes and weights in excess of the above, contact the Overweight Loads Office in Cheyenne at (307) 777-4376. | |
| Width | 18 ft |
| Height | 17 ft |
| Length | 120 ft, combination unit |
| Single axle | 25,000 lb |
| Single axle when included in a tandem axle | 29,000 lb |
| Tandem axle | 55,000 lb |
| Triple axle | 65,000 lb |
| Gross vehicle weight | 160,000 lb |
| Construction equipment with large tires | 55,000 lb per single axle |
Maximum permit limits are determined by axle configuration. Loads exceeding 250,000 pounds gross vehicle weight, axle group maximums, or interior bridge maximums are subject to a bridge review and a bridge analysis fee. Wyoming requests a two-week notice.
Vehicles must be licensed for the maximum legal weight they will haul. One hundred seventeen thousand (117,000) pounds is the maximum gross vehicle weight based on federal bridge formula Table I.
When the Department Bridge Program designates a bridge as Reduced Speed, a warning sign that reads “CAUTION-This vehicle must slow down to 5 mph to cross bridges” is required. The signs shall have a yellow background and be at least 60 inches wide by 10 inches high and displayed on the rear of the vehicle or load. The word CAUTION shall be in black letters at least 8 inches high and with a two-inch wide black lettering for the remaining description. The signs shall be kept clean, fully visible, and shall not cover OVERSIZE LOAD signs, lights, reflectors, or license plates on the vehicle.
Carriers or loads in excess of 18 feet wide or 18 feet high are time sensitive and must give a minimum of 24 hours' notice. Any load exceeding 18 feet wide shall not be allowed to travel on any primary and secondary highway during hours of local school bus traffic or heavy commuter traffic, as determined by the Overweight Loads Office. Loads 18 feet high or higher must contact and have authorization from all cities, counties, and utilities prior to operation.