RouteAllWyoming Oversize Load Signs, Flags And Lights
Sources Reviewed: October 23, 2026
Wyoming’s current size-and-weight rule gives a different sign size from the common 7-foot banner and contains unusual wording for the flag minimum. Preserve that distinction and resolve the flag measurement with the issuer before purchasing equipment.
On This Page
What Warning Sign Does Wyoming Specify?
The current Chapter 5 rule requires OVERSIZE LOAD signs visible from front and rear, yellow, at least 60 inches wide and 10 inches high. Black letters are at least 8 inches high and 1 inch wide, on one line. Signs must not cover lamps, reflectors or plates. A stated exception covers buses over 60 but no more than 75 feet. Remove the signs after the permitted move or when the vehicle is within size limits.
What Does The Rule Actually Say About Flag Size?
The published current text repeatedly says 12 square inches for red or fluorescent orange flags. It does not say 12 inches square in those passages. Those expressions describe different measurements; this guide does not silently change the rule into an equipment minimum. Confirm the intended dimension with WYDOT/Wyoming Highway Patrol and check applicable federal commercial-vehicle flag requirements before relying on a small flag.
Where Are Wyoming Flags And Night Markers Placed?
The rule marks overwidth front and rear corners and wider extremities. Rear overhang uses one or two flags depending on whether its width exceeds 2 feet. Overlength loads authorized after daylight require rear-corner red lamps and reflectors visible from the sides and rear at 1,000 feet. This describes equipment for an authorized movement; it does not itself authorize an after-dark trip or override weather restrictions.
Can A Bridge Condition Add Another Sign?
The escort-equipment section requires an additional reduced-speed warning when WYDOT designates a bridge for a 5 mph crossing. Keep that warning separate from the main OVERSIZE LOAD message and do not obstruct either one. Ask dispatch whether the issued route has a bridge instruction and which vehicle must display the associated message. Review the actual permit condition with the escort rather than inferring it from the route’s appearance on a map.
How Can RouteAll Help Prepare The Wyoming Trip?
Import the issued permit into RouteAll and review its extracted road sequence while parked. Compare the first road, connecting junctions and final approach with the document, then share the reviewed route with the crew. Keep your equipment checklist beside that route review. RouteAll helps organize and navigate the permitted route; it does not inspect banners, certify flag placement or establish that a lighting setup complies with the permit.
Before You Roll
Match the measured load to the permit category. Inspect the actual front, rear and projecting points after securement. Resolve any unclear marking instruction with the issuing authority before dispatch, and revisit it when equipment or the load changes.
Further Reading
- Compare State Sign Requirements
- Prepare The Oversize Equipment Checklist
- Read The Wyoming Oversize Permit
Sources And Scope
Original driver reference based on the identified official publications, reviewed October 23, 2026. The issued permit, current law and applicable commercial-vehicle rules control. Load markings and escort equipment are distinct. This page identifies the source scope and does not replace a complete equipment inspection.
- Wyoming Chapter 5 Current Size And Weight Rule — EffectiveApril 30,2025; sections 9 and 10 equipment; oddflagmeasurementretained.
- WYDOT Commercial Permits — Official equipment-clarification and permit entry point.