OAR 734-074-0045
Weather Restrictions
(1)
Movement of triple trailer combinations and the combination described in OAR 734-074-0010 (Vehicle Combinations Eligible for Permits) (1)(h) is prohibited when road surfaces are hazardous or when wind or other conditions may cause the unit or any part thereof to swerve, to whip, to sway or fail to follow substantially in the path of the towing vehicle.(2)
Road surfaces are considered hazardous for triple trailer combinations, and the combination described in OAR 734-074-0010 (Vehicle Combinations Eligible for Permits) (1)(h) when the surface is other than bare or wet pavement. Examples of “other than bare or wet pavement” include surfaces that have frost, ice, sleet or snow on the roadway.(3)
Movement of triple trailer combinations, and the combination described in OAR 734-074-0010 (Vehicle Combinations Eligible for Permits) (1)(h) is prohibited when visibility is less than 500 feet due to snow, mist, rain, dust, smoke, fog or other atmospheric conditions.(4)
All other combinations of vehicles operating under permits issued by division 74 rules must comply with the traction device requirements of OAR 740, division 100, OAR 734, division 17, and any other lawful order requiring the use of traction tires or devices.
Source:
Rule 734-074-0045 — Weather Restrictions, https://secure.sos.state.or.us/oard/view.action?ruleNumber=734-074-0045.