OAR 734-082-0036: Warning Lights for Motor Vehicles Transporting Overwidth Loads

(1) Except as provided in section (3) of this rule and in addition to any other lights required by law, an overwidth motor vehicle or a motor vehicle transporting an overwidth load shall be equipped with warning lights when: (a) Width exceeds 10 feet and the motor vehicle is operating on a two-lane highway; or (b) Width exceeds 12 feet and the motor vehicle is operating on a four-lane highway. (2) The warning lights shall be mounted on the towing vehicle above the roof of the cab, be clearly visible from 500 feet, have a minimum of 30 flashes per minute and be either: (a) Two flashing type amber lights as widely spaced laterally as practical; or (b) Revolving type amber light(s); or (c) Amber type strobe light(s) with 360 degree visibility. (3) An overwidth motor vehicle or a motor vehicle transporting an overwidth load is exempt from the warning light requirements when operating with a minimum of two pilot vehicles on all highways. (4) End load lights described in ORS 816.290 are required when visibility is less than 500 feet due to darkness, snow, mist, rain, dust, smoke, fog or other atmospheric conditions, and when a load extends beyond the rear of the load carrying part of the vehicle four feet or more.