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Oversized vehicles and loads

These vehicles and loads exceed the maximum height, weight, width, and/or length, specified by state law. All oversized vehicles and loads traveling within Seattle must obtain a permit to operate. City law allows SDOT to issue these permits.

How to get an oversized vehicle and load permit

  • Permits must be picked up, and that’s when payments are due. Accepted forms of payment are:
    • VISA/Master Card
    • Cash
    • Check
    • Money order

  • If you need additional information, contact the Traffic Permit Office (206) 684-5086.

Oversized vehicle and load permit rules

  • Required by City of Seattle in addition to any state issued permit
  • Must remain in the vehicle at all times and be available for inspection by enforcement officers or employees responsible with the care and safety of city streets
  • Only valid for the vehicle registered and the streets identified on it
  • Not valid during peak traffic periods (Monday – Friday, 6 – 9AM and 3 – 7PM), except holidays
  • No oversized vehicle and load transport is permitted during peak traffic periods

Downtown traffic control zone permit

The downtown traffic control zone (mapped right), allows vehicles 30 feet or longer to operate Monday – Friday, 9AM – 3PM by submitting this additional application for a Downtown Traffic Control Zone Permit and from 7PM – 6AM without permit. Curfews are in effect Monday through Friday from 6AM – 9AM and from 3PM – 7PM.

An oversized vehicle and load permit and/or a Validation Number are required within this zone from 7PM – 6AM. Oversized vehicles and loads shall not operate in this zone from 6AM – 7PM.

For questions contact the Traffic Permits Office at 206-684-5086 or via


Additional resources

Truck Streets Seaport Connectors Freight Intermodal Connectors
  • Truck drivers who use the Spokane St Corridor in south Seattle may want to download this map
  • Weight restrictions on state-owned bridges
  • Weight restrictions on City-owned bridges (see table below)
Structure Name Location Weight Restriction
Airport Way over ARGO RR Airport Way over the Union Pacific RR Yard Legal Loads Only, No Overloads
Magnolia Bridge, Pier 91 Ramps Center ramps to Port of Seattle on Magnolia Bridge. No Trucks Allowed
McGraw Street Bridge West McGraw Street over Ravine near 3rd Ave West. Single Truck 2 Axle-14 Tons
Single Truck 3 Axle-18 Tons
Truck Semi Trailer-28 Tons
Truck and Trailer -35 Tons
East Interlaken Boulevard East Interlaken Blvd. over 26th Ave East. Weight Limit 5 Tons
Fairview Ave N. (southbound) Fairview Ave North between East Galer Street and East Prospect Street. Weight Limit 40 Tons
Post Alley Post Alley between Columbia Street and Marion Street Single Truck 2 Axel-19 Tons

Permit Validation Numbers

Permit validation numbers reflect day-to-day routes and streets to be used by oversized vehicles and loads in Seattle. These numbers work in conjunction with other oversized vehicles and loads permits issued. Avoid citations from Seattle enforcement officers by obtaining validation numbers in advance and using authorized routes.

  • Validation numbers are free and quick to obtain. You can get them over the phone by calling SDOT at (206) 684-5086.
  • Numbers must be posted on original permit and obtained daily up to 24 hours in advance
  • Must reflect daily routes meant for transport by oversized vehicles and loads on city streets

Repair of damage and liability during movement of oversized vehicles and loads

By accepting a permit, the permit holder agrees to repair, at his or her expense, any damage to highway appurtenances or structures. If it is necessary that City crews repair damage, the permit holder will pay any costs incurred. The permit holder is responsible for all liability for injury to death of any person, or damage to property that may occur through any act or emission of either the permittee or the City arising from the issuance of a permit. In the event that any claim, suit, or action is brought against the City, its officers, employees or agents, permit holders shall defend, indemnify and hold harmless the City, its officers, employees, or agents from such claim, suit or action.



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