Special Motor Vehicle Permit

What is it?

A Special Motor Vehicle Permit is a permit to operate oversize/overweight vehicles on County Roads. This could be for anything from the transportation of a manufactured home to the hauling of equipment.

When do I need a permit?

  1. Legal dimensions are 8’-6” wide, 14’ high, and 40’ (single unit vehicle) / 53’ (semi-trailer) / 61’ (doubles) / 75’ (truck/trailer) long. If you exceed any legal dimension, you need an oversize permit.
  2. A vehicle or vehicle combination with a front overhang exceeding the 3’ legal limit set in RCW 46.44.034 requires an oversize permit.
  3. A vehicle or vehicle combination with any part of the permanent structure or load extending in excess of fifteen feet beyond the center of the last axle of said vehicle (i.e. rear overhang in excess of 15’).
  4. If you have a non-divisible load that exceeds 80,000 pounds GVW and/or what is allowed per the legal weight table, then you need a permit for weight.
  5. If you have a divisible load that is heavy, exceeding what is allowed per the legal weight table then you need a permit for weight. Maximum GVW for a divisible load is 80,000 pounds.
  6. If you wish to haul oversize/overweight property on weight restricted roads, roads restricted for safety purposes, or roads with winter restrictions, then you need a permit.

* If you are unsure whether or not a permit is required contact Douglas County staff. *

When do I need a Pilot/Escort Vehicle? - (WAC 468-38-100)

A pilot/escort vehicle and operator must comply with the requirements of WAC 468-30-100. Pilots/Escort vehicles are required when:

  1. Vehicle(s) or load exceeds 11 feet in width; escort vehicles (both front and rear) are required on all two-lane highways.
  2. Vehicle(s) or load exceeds 14 feet wide; one rear escort vehicle is required on multiple-lane highways.
  3. Trailer length including load exceeds 105 feet (tractor/trailer combination) requires a rear escort vehicle on all two-lane highways.
  4. Trailer length including load exceeds 125 feet (tractor/trailer combination) requires a rear escort vehicle 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 vehicle on two-lane highways.
  6. Rear overhang exceeds 20 feet on a single unit vehicle, requires one rear escort vehicle on two-lane highways.
  7. Loads exceed 14 feet 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. Douglas County 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. The vehicle(s) or load exceeds twelve feet in width on a multilane highway and has a height that requires a front pilot/escort vehicle: One rear pilot/escort vehicle is required.
  9. When in the opinion of Douglas County staff, escort vehicles are necessary to protect the traveling public, for any oversize and/or overweight move, either across, upon, or along a highway.

Front/Rear Overhang - (RCW 46.44.034)

The load, or any portion of any vehicle, operated alone upon the public highway of this state, or the load, or any portion of the front vehicle of a combination of vehicles, shall not extend more than three feet beyond the front wheels of such vehicle, or the front bumper, if equipped with a front bumper.

No vehicle shall be operated upon the public highways with any part of the permanent structure or load extending in excess of fifteen feet beyond the center of the last axle of such vehicle.

Nighttime Movements - (WAC 468-38-075)

A vehicle or vehicle combination not exceeding the defined envelope of 12 feet wide, 14 feet 6 inches high, and 105 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 and must have “Nighttime Travel” checked on their approved permit. Night means one-half hour after sunset to one-half hour before sunrise. Vehicle and load must have proper lighting (49 CFR 393.11).

Winter Road Restrictions - (RCW 46.44.080)

Movement by permit is prohibited on roads with published traction advisories/requirements. Check our homepage or our Road Closures and Restrictions Map for up to date information.

Holidays - (WAC-38-175)

Overweight vehicles that cannot maintain the speed of the surrounding traffic flow, and all over dimensional vehicles/loads are prohibited on the holidays of New Year’s Day, Thanksgiving Day, Independence Day, Labor Day, Thanksgiving Day, the day after Thanksgiving Day, Christmas Day, and during the afternoon of the day preceding said holidays.

How do I apply?

You can apply online through the Permit Portal or in person at the Public Services Building located at 140 19th Street NW in East Wenatchee. Most permits can be issued same day if the applicant can provide the necessary information.

Loads exceeding dimensions 16’ wide, 16’ tall, 125’ load length, or 200,000 pounds are considered “superloads” and require special consideration prior to permit issuance. Applications for loads over 200,000 pounds must be submitted at least thirty (30) days before the proposed date of movement. Applications for loads over 16’ wide, 16’ tall, or 125’ long must be submitted at least seven (7) calendar days before the proposed movement date.