Wyoming Administrative Code
Agency 045 - Transportation, Dept. of
Sub-Agency 0004 - Motor Carrier
Chapter 5 - SIZE AND WEIGHT LIMITATIONS OF VEHICLES
Section 5-7 - Permitted Hours and Dates of Movement; Weather Conditions

Universal Citation: WY Code of Rules 5-7

Current through September 21, 2024

(a) Hours. The movement of any oversize load or vehicle shall be made only during daylight hours, except for the following:

(i) With permission of the Wyoming Highway Patrol.

(ii) A single unit as part of a combination exceeding 60 feet in length, properly permitted, signed, and lighted as required in Section 8, Safety Measures and Moves- provided the overall length of the combination does not exceed 110 feet.

(iii) A single unit alone exceeding 60 feet in length properly permitted, signed, and lighted as required in Section 8, Safety Measures and Moves-provided the total length of the single unit does not exceed 75 feet.

(iv) A load up to 10 feet wide properly permitted and equipped as required in Section 8, Safety Measures and Moves, on INTERSTATE HIGHWAYS ONLY (with a 5-mile allowance given on primary and secondary highways for food, fuel, services, and/or terminal or point of delivery).

(v) If properly permitted, signed, and lighted as required in Section 8, Safety Measures and Moves, and escorted as required in Section 10, Escort Equipment, a vehicle or load responding to the location of the emergency or train derailment (not including the return trip) as determined by the Wyoming Highway Patrol shall be allowed to operate after hours as follows:
(A) Interstate highways-a vehicle or load more than 10 feet wide shall have one escort to the rear.

(B) Primary and secondary highways-a vehicle or load more than 8 feet 6 inches wide shall have one escort front and one to the rear.

(C) Over length loads shall meet requirements found in Section 7(a)(ii).

(vi) Permit-issuing authorities may restrict movements to daylight hours of minimum traffic volume. These hours may be stipulated as a condition of the permit.

(vii) 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).

(b) Overweight movements meeting legal size requirements are allowed to move with a permit. These vehicles are not limited to operating during daylight hours.

(c) Permits shall be issued for a reasonable amount of time to complete the movement, but not to exceed four days. The Department shall take extenuating circumstances such as illness, weather, mechanical problems, and so forth into account in determining whether to grant an extension. Date extensions may be obtained from the appropriate permit issuing authority.

(d) Oversize movements requiring escorts shall not be allowed on legal holidays or during local celebrations when heavy local traffic is anticipated. Legal holidays when travel shall be restricted are the following:

(i) New Year's Day - January 1

(ii) Memorial Day -The last Monday in May

(iii) Independence Day - July 4

(iv) Labor Day - The first Monday in September

(v) Thanksgiving Day - The fourth Thursday in November, restricted on Thanksgiving Day only

(vi) Christmas Day - December 25

(e) Moves requiring escorts shall not be permitted to travel from one-half hour after sunset the evening before a holiday until one-half hour before sunrise the day after the holiday. When a holiday is combined with a weekend for a 3 day weekend, these restrictions shall be in force from one-half hour after sunset the day preceding the holiday weekend until one-half hour before sunrise the day following the holiday weekend. When a holiday falls on a Saturday, no move requiring escorts shall be permitted from one-half hour after sunset Thursday until one-half hour before sunrise Monday. When a holiday falls on a Sunday, no move requiring escorts shall be permitted from one-half hour after sunset Friday until one-half hour before sunrise Tuesday. Permits requiring escorts during holiday weekends or as determined by the Overweight Loads Office may exceed four days.

(f) In cases of extreme emergencies where oversize and overweight moves requiring escorts must be made on legal holiday or weekends, the Wyoming Highway Patrol shall be contacted. If the Wyoming Highway Patrol concurs the move is necessary, it shall assist in obtaining the appropriate permission.

(g) The Wyoming Highway Patrol or Wyoming Department of Transportation may halt or limit any movement that is damaging the highway or poses a hazard to the motoring public.

(h) Oversize loads also may be restricted during inclement weather on ice- and snow-covered highways. Inclement weather includes rain, fog, snow, ice, and high-wind conditions.

(i) Oversize loads shall not be allowed to move if the highway is restricted to no unnecessary travel or if tire chains are required. The Wyoming Department of Transportation or Wyoming Highway Patrol may restrict movements of specific oversize loads because of low visibility or high winds. A load may proceed or return to the nearest parking area or town. At no time shall the move continue beyond these points unless approved by the Wyoming Highway Patrol.

(ii) Weather related restrictions are as follows:

Class 1 This restriction includes mobile homes and all light oversize loads. Generally, when maintenance implements "9-4" conditions, this will automatically create a Class 1 Restriction. If maintenance has not issued "9-4" conditions, a trooper may issue a Class 1 Restriction, based on his or her individual observation of high wind conditions in a particular area.

Class 2 Escorted movements only will be restricted.

Class 3 Overwidth movements only will be restricted.

Class 4 All oversize movements will be restricted.

These restrictions do not apply to loads that are overweight only.

Disclaimer: These regulations may not be the most recent version. Wyoming may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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