RouteAllOklahoma Oversize Load Signs, Flags And Lights
Sources Reviewed: October 23, 2026
Oklahoma’s load sign is not a universal 7-foot banner. The published ODOT rules specify a smaller minimum panel, while flags and escort lighting have their own requirements.
On This Page
What Sign Does Oklahoma Specify?
Under OAC 730:50-5-15, permitted oversize loads need front and rear OVERSIZE LOAD signs. The minimum panel is 5 feet long by 14 inches high, with yellow background and black letters at least 8 inches high and a 1⅛-inch stroke. The rear sign goes on whichever extends farther: load or towed vehicle. Legal-dimension vehicles must not display these signs. Inspect a flexible banner under tension; a folded edge can hide part of its wording.
How Are Oklahoma Flag Locations Chosen?
Flags must be solid red or fluorescent orange and at least 18 inches square. The rule covers permitted overwidth and overlength movements, excluding extra-length combinations, and rear overhang of at least 4 feet. Mark overwidth front and rear corners plus wider side extremities. At the rear projection, use one flag if its width is 2 feet or less and two if wider. Identify the cargo edge rather than simply using the trailer’s convenient mounting points.
Does The Escort Use The Same Panel?
ODOT’s escort rule references the load-sign specification but permits an escort sign at least 10 inches high. Its position depends on whether the escort leads or follows. Escort amber warning equipment must be roof-mounted, visible at 500 feet in normal sunlight and cover 360 degrees. That provision is an escort requirement, not proof that a flashing beacon alone equips the trailer. Ask the pilot operator to confirm their sign and lamp setup separately.
What Should Be Resolved Before An Oklahoma Move?
If the cargo is a manufactured home, verify the special rear mounting-height instruction in the published rules. Review the issued permit for any movement-specific conditions before treating the minimum sign dimensions as the whole equipment plan. A borrowed banner should be measured, not judged by whether it looks similar to the previous carrier’s. Keep spare flags accessible while safely parked, rather than making an unplanned roadside equipment stop.
How Can RouteAll Help Prepare The Oklahoma 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 Oklahoma 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.
- ODOT Size And Weight Permit Rules — OAC 730:50-5-15 and escort equipment in 730:50-5-16.
- ODOT Size And Weight Permit Resources — Official entry point for rules and movement questions.