OAR 734-082-0009: Emergency Vehicle Authorization

(1) Emergency vehicles are authorized to operate with a variance permit that is not subject to the maximum limits established in Division 82, provided the following axle and group axle weights are not exceeded: (a) 24,000 pounds on a single steering axle; (b) 33,500 pounds on a single drive axle; (c) 62,000 pounds on a tandem axle; or (d) 52,000 pounds on a tandem rear drive steer axle. (2) Emergency vehicles are authorized to operate with a variance permit when: (a) Operating within the jurisdiction of the road authority issuing the permit, including any “mutual aid” agreement area; (b) Operating in response to any emergency act declared by the Governor; or (c) Maintaining, deploying or re-deploying such emergency vehicle. (3) Emergency vehicle operations conducted under a variance permit are subject to the terms of the variance permit, which includes the following: (a) The fully loaded fire apparatus must be equipped with tires of sufficient size that the gross weight on any wheel, axle, tandem axle, or group of axles does not exceed 635 pounds per inch of tire width or the manufacturer’s sidewall tire rating, whichever is less; and (b) The weight limitation in effect on any highway, highway section, bridge, or structure. Bridges with weight restrictions on state and interstate highways can be found on the Oregon Road & Bridge Restriction List, which is available online at http://www.oregontruckingonline.com/cf/MCAD/pubMetaEntry/restrictionsList/. (4) Prior to the original issuance of a variance permit or subsequent renewal for vehicles not previously weighed, the fully loaded fire apparatus must be weighed by ODOT Motor Carrier Enforcement staff to ensure the maximum weight limits described in sections (1) and (3) above are not exceeded.