OAR 734-076-0135
Warning Signs and Flags Required for Oversize Units
(1)
Warning signs are required for dimensions exceeding:(a)
Eight feet, six inches in width;(b)
An overall length of 105 feet (inclusive of towing vehicle); or(c)
For a combination of vehicles being towed exceeding 80 feet in length (inclusive of load).(2)
Warning signs must bear the legend “OVERSIZE LOAD” except:(a)
When the width exceeds eight feet, six inches and the combination of vehicles being towed does not exceed 80 feet in length (inclusive of load) or the overall combination length does not exceed 105 feet (inclusive of towing vehicle), the sign may bear the legend “WIDE LOAD”; or(b)
When the width does not exceed eight feet, six inches and when the combination of vehicles being towed exceeds 80 feet in length (inclusive of load) or the overall combination length exceeds 105 feet (inclusive of towing vehicle), the sign may bear the legend “LONG LOAD.”(3)
Warning signs must be displayed to the front and rear of the vehicle or combination and must meet the following requirements:(a)
Signs must be seven feet wide by 18 inches high with black letters 10 inches high in accordance with Federal Highway Administration series C on highway yellow background;(b)
The highway yellow background of the sign must be made of reflectorized material when operating between one half hour after sunset and one half hour before sunrise;(c)
Signs must be kept clean, legible and mounted horizontally with adequate support to provide full visibility and readability at all times when in use;(d)
Signs must not cover or interfere with the visibility of the vehicle’s registration plates; and(e)
All such signs must be removed or retracted when not required.(4)
The outermost extremities of any overwidth load must be marked during daylight hours with red or fluorescent orange flags not less than 18 inches square. Flags must be kept clean and must be clearly visible to the front and rear. The attachment device must not extend beyond the widest extremity by more than three inches on either side.
Source:
Rule 734-076-0135 — Warning Signs and Flags Required for Oversize Units, https://secure.sos.state.or.us/oard/view.action?ruleNumber=734-076-0135.