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Changing a Speed Limit

Speed sign update

Oregon Revised Statute 810.180 allows ODOT primary authority to designate speeds on all public roadways, when it is different than the statutory speed.

In order to post a designated a speed limit, ODOT must complete an engineering investigation and obtain approval from the state traffic roadway engineer.

  • For state highways within city limits, city streets and county roads the request to change a speed zone must be initiated by the road authority.
  • For state highways in city limits, unless there is a geometric, roadside culture or other major roadway change, it is our practice to initiate a speed zone investigation at the request of the city in which it resides.
Contact the Traffic Section
555 13th St. NE
Salem, OR 97301

Speed Zone Homepage




Under ORS 810.180, ODOT is allowed to delegate its authority for designated speed limits to some local agencies with jurisdiction over their public roadways. Local agencies with this delegated authority must follow the same administrative rules and complete the same engineering investigation as ODOT; however, a designated registered professional engineer approves the investigation.

Requests to change a speed limit on a roadway in a city or county with delegated authority must be made to that road authority.

Local Agency Requests

Local agencies have a total of seven (7) options when considering changing or establishing a speed limit. These options are detailed in our Local Agency Options document. Cities and counties may submit requests to ODOT via our online request form. Once received, we initiate an investigation to determine if the speed limit should change.

See the form instructions sheet for guidance. Please direct additional questions to ODOTSpeedZoning@odot.oregon.gov.

Local agencies may submit additional documents by replying to the automated acknowledgement email received after submittal.

Requests from the Public

If you know the jurisdiction of the road:

  • For city streets or county roads, please contact your local jurisdiction.
  • For state highways outside city limits, please email us at ODOTSpeedZoning@odot.oregon.gov requesting a review.