Motor Carrier Transportation Division,
Over-Dimension Permit Unit
3930 Fairview Industrial Drive SE
Salem OR 97302-1166
PHONE: (503) 373-0000

Hours of Business

Mon-Fri 7:00 AM - 5:00 PM | Closed Wednesday noon - 1:00 PM (Mountain time)


Oregon Transportation Permit Unit requirements reference state specific highway groups and routes. For guide purposes only, the following is a link to ODOT’s Route Map 2 as referred to in escort requirements section below.

Escort requirements based on width

Major 2-lane routes (those shown in Green on Route Map 2)

  • Travel of oversize loads generally do not require a Front escort until the width exceeds 12’, however, there are routes which will require an escort(s) when the width exceeds 9’ (those shown in Purple on Route Map 2).
  • If width exceeds 12 feet, either certified flaggers and signing will be required (per The Manual of Uniform Traffic Control Devices) or the certified rolling stop method (which requires three pilot vehicles) is required.

On interstate highways and 4-lane roads

  • A minimum of 1 rear escort will be required on vehicles over 14’ in width. The actual number of escorts required will depend on the route and dimensions of load.

Escort requirements based on height, length, and overhangs

The permit office may require escorts for vehicles over legal length and/or height limits.

Super loads:

  • Any load exceeding the following dimensions is considered a super load:
  • Over 16’ wide on the Interstate
  • Over 14’ wide on any state two-lane highway
  • Over 17’ high on any highway
  • Mobile or modular unit with a box width over 14’ wide and/or overall width greater than 15’
  • Overall length greater than 150’.

Permit may take up to 10 days to issue.

Escort vehicle requirements can differ significantly by state in terms of mandatory driver qualifications, training, certifications, vehicle weights, obligatory signage/flags/lighting, necessary onboard equipment, and more. The ODS team can provide you with all additional requirements specific to your route.

Operating Times

Generally, movement can take place weekdays during daylight hours (from one half hour before sunrise to one half hour after sunset). Daylight hour travel is allowed on Saturday and Sunday, except between Memorial Day to Labor Day, during which period travel is allowed Saturday until 12:00 noon and prohibited on Sunday.

Over-dimension loads are subject to nighttime travel restrictions, weekend travel restrictions, and city hour travel restrictions which vary based on the type of combination of vehicles.

Overwidth loads have nighttime travel restrictions, city hour travel restrictions, and daylight travel restrictions on Saturday afternoons and all-day Sundays during the summertime between Memorial Day and Labor Day.


Travel is prohibited on New Year’s Day, Memorial Day, Independence Day, Labor Day, and Christmas (generally from 2PM on the last business day preceding observed holiday until a half hour before sunrise of the first business day following the observed holiday).

Adverse weather

Motor carriers moving oversize loads are subject to travel restrictions when road conditions are hazardous due to ice, snow, frost, or when visibility is reduced to less than 500 feet, or when wind conditions exist that make it difficult for vehicles to safely move.