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U.S. 20 at Tumalo

Design Phase

Region 4: Central Oregon (Bend, Deschutes)

Intersection safety improvements



​ODOT and Deschutes County have partnered to design and construct a two-lane roundabout at the intersection of U.S. 20 and OB Riley/Cook Ave. 

The project developement process consists of the following phases: 
  • ​Phase 1: Perform traffic analysis and an alternatives analysis to evaluate previously adopted concepts and new potential solutions. Complete Spring 2019 
  • Phase 2: Refine concept alternatives and conduct an extensive public outreach process to gain broad community and stakeholder input on potential solutions. Develop project to 30% design. Complete Summer/Fall 2019
  • Phase 3: Begin the right-of-way acquisition process and develop the project to Final Design.  On going

Past safety improvements 
ODOT and Deschutes County have implemented several short term solutions to help improve the U.S. 20 Tumalo corridor. These include:
  • Speed studies conducted in 2005, 2007 and 2009. In 2005, the speed through Tumalo was reduced to 50mph, and in 2007, the speed was reduced to 45mph
  • Advance speed zone signs installed east and west of Tumalo to alert drivers of the speed reduction ahead.
  • Realignment of O.B. Riley Road and created a 4-way intersection.
  • Striping modifications to make it safer for northbound traffic on O.B. Riley Road to turn right and prevent eastbound traffic on US 20 from changing lanes in the intersection.
  • Advance intersection signs with street names to improve awareness of upcoming intersections.
  • Enlarged stop signs for Bailey Road and 7th Street to improve driver compliance.
  • Stop bar realignment to improve visibility of vehicles on the side streets.
  • Left hand turn refuge on US 20 at the intersection of Bailey Road and 7th Street.
  • Raised curb median at US 20 and 7th Street/Bailey Road.


U.S. 20 | ​​U.S. 20 and the intersection of Cook Ave./OB Riley​ in Tumalo

Cost and Funding

Project planning and design: $2 million
Project construction: approximately $12 million


This project will develop solutions that address short and long-term safety goals and congestion problems while meeting the needs of the many stakeholders that use this section of US 20.

​​U.S. 20 is a critical part of the State’s transportation system. U.S. 20 is an important freight route that supplies goods and services to central and eastern Oregon. It is also an important highway for local commuting traffic and the surrounding community. Keeping highways safe and traffic moving are critical parts the Oregon Department of Transportation’s mission. 

What Problem Will This Improve?

There have been a total of 21 crashes on US 20 between the intersections of 5th Street and Cook Avenue/OB Riley Road over a six year period between 2009 and 2014.  Of these crashes, 14 were intersection related.  Nine of the crashes resulted in injuries, of which two involved severe injuries. There were no fatalities during this period. 43% of the intersection crashes were left turning and 29% crossing  maneuvers, with the major cause being failure to yield right-of-way.

Crash data shows an improvement over data collected from 2005 to 2008 which showed a total of 24 in this corridor of which 19 people were injured. 

Congestion along US 20 in Tumalo 
The population growth in Tumalo and the surrounding area and the increase of traffic on US 20 are increasing congestion and backups on side streets and making it difficult for drivers to turn onto the highway from local streets. In 2019, traffic volumes are expected to increase to 15,200, nearly double counts in 2000.

Contacts & Media

Us 20 at Tumalo Project Map


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Project Contacts

Project Leader
Emerald Shirley

Area Manager
Bob Townsend

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Last Updated

2/20/2020 2:36 PM

Project Number


Project Documents

Related documents to this project
2010TumaloProject.pdfUS 20 @ Tumalo 2010 Project Map
Public Open House 2 Presentation.pdfPublic Open House #2 Presentation
StripingModificationsTumalo.pdfUS 20 @ Tumalo Striping Modificiations
Tumalo Concepts Scoring Matrix.pdfTumalo Concepts Scoring Matrix
Tumalo Concepts Map.pdfProject Concepts Map
US20atTumaloVicinityMap.pdfUS 20 @ Tumalo Vicinity Map
US20TumaloPIP.pdfUS 20 at Tumalo Project Information Paper

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