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Special Motor Vehicle Permits

Order Permits on line – click here.

For fast and affordable service for you and your company, the WTA can supply you with the following special motor vehicle permits:
  • annual and/or monthly over dimensional
  • daily overweight or over dimensional
  • log tolerance
  • temporary additional tonnage
  • western regional
  • fixed load
  • empty apple bins (over dimensional)
  • single trailers/double trailers
  • 61' non divisible load
  • trip/fuel
  • manufactured homes 30-day transfers
  • transfer permit request forms

Days & Times Permitted Movement Prohibited
Overdimensional movements are prohibited from movement and overweight vehicles that cannot maintain the speed of the surrounding traffic flow are also prohibited on the holidays of New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day, and during the afternoon of the day preceding said holidays. Should any of the holidays fall on a Saturday or Sunday, the preceding Friday or the following Monday shall be considered such holiday. Check commuter curfew hours.

Escort Car Requirements
A pilot/escort vehicle and operator must comply with the requirements of WAC 468-38-100 Escort vehicle requirements. Pilots/Escort vehicles are required when:
  1. Vehicle(s) or load is over 11 feet in width; escort cars (both front and rear) are required on all twolane highways.
  2. Vehicle(s) or load is over 14 feet wide; one rear escort vehicle is required on multiple-lane highways.
  3. Trailer length including load exceeds 105 ft., of a tractor/trailer combination, requires a rear escort car on all two-lane highways.
  4. Trailer length including load exceeds 125 ft., of a tractor/trailer combination, requires a rear escort car on multiple-lane highways.
  5. Rear overhang of a tractor/trailer or truck/trailer combination exceeds 1/3 of the trailer length including load, requires one rear escort on twolane highways.
  6. Rear overhang exceeds 20 feet of a single unit vehicle, requires one rear escort car on two-lane highways.
  7. Loads exceed 14 feet and 6 inches high, one escort vehicle is required in front equipped with a height pole. Manufactured housing requires front escort with height pole when exceeding 15 feet in height. The Department does not guarantee height clearances; therefore, on any route where the height is in question, a front escort vehicle equipped with a height pole should be used.
  8. In the opinion of the Department of Transportation, escort vehicles are necessary to protect the traveling public, for any overdimensional and/or overweight move, either across, upon, or along a highway.

Legal Dimensions
Width 8 ft 6 in
Height 14 ft
Length single unit - 40 ft
single trailer - 53 ft
truck/trailer comb - 75 ft
two trailing units - 61 ft
3-axle log truck and 2-axle pole trailer - 75 ft
Overhang Front - 3 ft from bumper
Rear - 15 ft from center of last axle

Nighttime Movements
A vehicle or vehicle combinations not exceeding the defined envelope of 12 feet wide, 14 feet 6 inches high and 100 feet long, including legal overhang(s), may move at night. A vehicle or vehicle combination which exceeds the defined envelope may also be permitted to move at night on state highways subject to department preferred hours/routes of travel, and must have "Nighttime movement approved" stated on permits. All night moves must comply with published curfew restrictions. Night means one-half hour after sunset to one-half hour before sunrise. Vehicle and load must have proper lighting (49 CFR 393.11).

Oversize Load Signs
"OVERSIZED LOAD" signs are required on all over dimensional loads, except as provided for in the Exemptions for Some Over Length Vehicles section of this manual. Signs must be 7 feet long and 18 inches high with black lettering at least 10 inches high. Signs on escort vehicles must be at least 5 feet long, 10 inches high, with black lettering at least 8 inches high on a yellow background.

Winter Road Restrictions
Movement by permit is prohibited in areas where any of the following signs are displayed: "TRACTION ADVISORY OVERSIZE VEHICLES PROHIBITED, VEHICLES OVER 10,000 GVW CHAINS REQUIRED, AND ALL VEHICLES CHAINS REQUIRED EXCEPT ALL-WHEEL DRIVE' except as specified in WAC 468-38-075.

Canadian Information
Canadian Border Wait Times -

Canadian Border Information -

British Columbia Trucking Association -
Phone numbers: 1-800-565-2282 or 1-604-888-2941


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