Select a State:

Oversize Overweight OS/OW Superload
53' trailer length,
8'6" wide, and
14' high
80,000 lbs
Exceeding legal
weight and dimension
16' wide,
16' high, and
200,000 lbs
Single Trip =
Single Trip =
$0.07 per mile
(see Overweight
Chart below)
Single Trip =
$10.00 + OW Fee
TBD upon review
of diagram stating
load info, including
weight, dimension,
axle spacing and more
Overweight Fee Chart
Weight over legal Fee per mile
on State Hwy
Weight over legal Fee per mile
on State Hwy
1-9,999 $0.07 55,000-59,999 $1.35
10,000-14,999 $0.14 60,000-64,999 $1.56
15,000-19,999 $0.21 65,000-69,999 $1.77
20,000-24,999 $0.28 70,000-74,999 $2.12
25,000-29,999 $0.35 75,000-79,999 $2.47
30,000-34,999 $0.49 80,000-84,999 $2.82
35,000-39,999 $0.63 85,000-89,999 $3.17
40,000-44,999 $0.79 90,000-94,999 $3.52
45,000-49,999 $0.93 95,000-99,000 $3.87
50,000-54,999 $1.14

*The fee for weights in excess of 100,000 lbs is $4.25 plus $0.50 for each 5,000 lbs increment or portion thereof exceeding 100,000 lbs. Minimum fee is $14.00

When Escorts are Needed: # of Escorts:
On 2 Lane Highways
Width over 11' 2 (front and rear)
Length over 105' 1 rear
Height over 14'6" 1 front w/high pole
(county or city authorization necessary to accommodate the move)
Front overhanging (depends on route) 1 front
Rear overhang 1 rear
When load measured from the center of the last axle exceeds 1/3 or the total length
On Multiple Lane Highways
*Width over 14'-20' 1 rear
*Width over 20' 2 (front and rear)
Length over 125' 1 rear
Height over 14'6" 1 front w/high pole
Height over 15' (county to city authorization necessary for detours to accommodate move)
Front overhang measured from front bumper of the vehicle, rear from center of last axle.

Overhang Requirements:

Maximum legal overhang allowed is 3' (three feet) beyond the front bumper and 15' (fifteen feet) rear measured from the center of the last axle. Overhang exceeding these dimensions will require an over length permit.

Police Escorts:

$72.50 per hour per Trooper with a 3 hour minimum.

Permits Valid For:

Single Trip Permits for over-weight shipments are valid for whatever amount of time the shipment requires.  Single Trip Permits for over-dimensions will be issued for either thirty (30) days, or one (1) year, depending on application request.

Operating Time

Permitted loads are allowed travel from one-half hour before Sunrise to one-half hour after Sunset as limited by the following schedule:  Monday, Tuesday, Wednesday, Thursday moves allowed all day, and Friday shipments are prohibited after 3:00 p.m.

Nighttime Shipments:  A load or vehicle not exceeding the defined envelope of 105' long, 12' wide, and 14'6" high may travel at night.  Vehicles or loads that exceed these dimensions 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 at all times.  Nighttime Travel is defined as one-half hour after Sunset to one-half hour before Sunrise.

Vehicles operating under an over-weight permit with legal dimensions may operate twenty-four (24) hours a day, seven (7) days a week providing that they can maintain speed with surrounding traffic.  Vehicles not exceeding 100' long x 10' wide x 14' high may operate at night with proper lighting as defined in Federal Regulations 49 CFR part 393.11.

Weekend Travel

Permitted loads are allowed travel on Saturday from one-half hour before Sunrise to one-half hour after Sunset.  Permitted loads are allowed travel on Sundays until 12:00 noon.

Divisible Loads

Permitted loads must be reduced to their lowest possible dimensions and weight.  Any and all attachments/items that have been removed to reduce dimensions or weight must be shipped as a separate load.  Loads that are created by means of welding, bolting, or tying will be considered reducible cargo by the State of Washington.


When a machine is such that its dismantling is virtually impossible, it may be allowed to move by permit if a strong case can be made that it must be moved.

Restricted Travel

Movement by special permit will be prohibited on urban sections of State Highways in the vicinity of cities having a population of more than 15,000 and other sections of highway having excessive volumes of traffic during morning and evening commuting hours.  The Department will prescribe specific hours and regulations for over-size movements in and adjacent to Seattle, Tacoma, Spokane, Everett, Vancouver and other areas as deemed necessary.  Movement of empty equipment trailers up to 10' wide may be allowed during such hours on a trip to pick up, or from delivering an over-width load. Commuter hours for permitted restrictions are from 6:30 - 8:30 a.m. and 4:00 - 6:00 p.m.

Moves shall not be made when visibility is reduced to less than 1,000' or under hazardous roadway conditions deemed unsafe by the Department of Transportation, or the Washington State Patrol.

Permitted movements are prohibited where any of the following signs are displayed:  "Approved traction tires recommended", "Approved traction tires required", "tire chains required", or "Traction tires advised".

Superload Requirements

Loads or vehicles that are 16' wide x 16' high, and 200,000lbs. or more are considered Super-loads.  The State of Washington determines the need for Super-load length permit on a case by case basis.  As a rule of thumb, loads or vehicles that are over 125' long should be submitted for Super-load review.

An application for a special permit for gross weight of any combination of vehicles exceeding 200,000 lbs. shall be submitted in writing to the Washington Department of Transportation (WSDOT) at least thirty (30) days in advance for processing and approval.  Applications for loads exceeding 16' wide or 16' high should be allowed at least seven (7) business days for processing and approval.