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Commercial Vehicle Services
7345 Linderson Way SW
PO Box 47367
Tumwater, WA 98504-7367

Western Regional Permit

As part of the Western Association of Highways and Transportation Officials (WASHTO) the Western Regional Permit enables commercial vehicle customers to purchase one permit for travel to 12 states. Each state has designated routes for use with this regional permit.

These designated routes (pdf 2mb) are major highways including interstates to allow oversize moves from state to state with one permit.

The permit holder must comply with each individual state's rules and regulations, but you will only have to apply and carry one permit.


Envelope Vehicle (general)


  • 600 lbs. per inch width of tire
  • 21,500 lbs. per axle
  • 53,000 per tridem axles (wheel base 8 ft. to 13 ft.)
  • 160,000 lbs.
  • Minimum of 5 axles

Dimension - limits

  • 110 ft. overall length
  • 14 ft. width
  • 14 ft height

* Brochure detailed requirements and issuing offices (pdf 416kb)

Participating States