Trucks advised to avoid US20 - use alternate routes

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For more information: (503) 373-0000, option 1 for information about over-dimension loads; (503) 378-6699 for information about registration services 

Length restrictions for commercial vehicles in effect on US20

US20 from MP 46.50 (Cascadia, east of Sweet Home) to the junction with OR126 (Santiam Junction) is restricted to the following lengths:

  • Truck Tractor and Semitrailer combinations are limited to 60 feet in overall length.
  • Doubles combinations are limited to 75 feet in overall length, if the loadspace (the distance from the front of the first trailer to the back of the second trailer) does not exceed 60 feet.  No single trailer can exceed 40 feet in length.
  • Triples combinations are not authorized to use this section of US20.

Length limits for other combination types can be found on Group Map 1 and Route Map 7.

Link to Map 1: https://www.oregon.gov/odot/Forms/Motcarr/8100.pdf

Link to Map 7: https://www.oregon.gov/odot/Forms/Motcarr/8104.pdf

Commercial traffic that exceeds these length limits should use other highways between Central and Western Oregon, including I-84, US26, and OR58.

If you have any questions about length limits on state highways, please contact the Over-Dimension Permit Unit at 503-373-0000, Option 4. We are available Monday-Friday between the hours of 7 AM & 5 PM Pacific time, closed on state holidays, and on Wednesdays from 12 noon to 1 PM Pacific time for staff meetings.

Images of tractor trailer hanging over edge of road embankment
trip check

For help determining authorized alternate routes, contact the agency’s Over Dimension Permit Unit, (503) 373-0000, Monday through Friday from 7 a.m. to 5 p.m. For current construction and travel information, visit www.tripcheck.com or dial 511.