Simplify Your Oversize/Overweight Loads
For All State Regulations, See:
“Oversize Load” signs are required for all oversized loads at the front of the tractor at a height of 5′ from ground level (or as high as practicable on the vehicle or load if it cannot accommodate the 5′ height), and at the rear of the vehicle. Signs must be 7 feet long and 18 inches high with black lettering at least 10 inches high on a yellow background.
Flags must be displayed on all four corners of all overwidth loads, and at the extreme ends of all protrusions, projections, or overhangs.
When night movement is allowed, loads projecting beyond the sides of the vehicle must have amber lights visible from the front and side at the outermost extremities. Rearmost edge(s) of the projecting load must be marked with a red lamp visible from the rear and side.
http://www.wsdot.wa.gov/CommercialVehicle/permitting.htm
Dimensions: Width: 8' 6" (8' Local roads) Height: 14' Semi-trailer: 53'
Washington Oversize / Overweight Permit Regulations
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North Carolina Oversize Load Flags, Lights, Banners, Running Hours and Holiday Restrictions
Georgia Oversize Load Flags, Lights, Banners, Running Hours and Holiday Restrictions
Kentucky Oversize Load Flags, Lights, Banners, Running Hours and Holiday Restrictions
Michigan Oversize Load Flags, Lights, Banners, Running Hours and Holiday Restrictions