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I-5: Aurora-Donald Interchange Project, Phase 1

Design Phase

Region 2: Willamette Valley and Northwest Oregon (Aurora, Donald, Marion)

Addressing interchange problems and determining immediate and long-term improvements.​​​​​​

Design Banner



Meeting Schedule

November 12, 2019:

  • 7:00 p.m. Presentation at Aurora City Council at 21420 Main Street in Aurora.

  • 8:00 p.m. Presentation at Donald City Council at 10710 Main Street NE in Donald.

November 13, 2019:

North Marion High School Commons, 20167 Grim Road NE, Aurora, OR 97002

  • 4:00-5:30 p.m. Business and Stakeholder Engagement Group meeting.

  • 6:00-8:00 p.m. Public Open House. Stop by and review the recommended future full interchange design with refined road connections, as well as the recommendations for Phase 1 improvements.

Project Details

We are developing an Interchange Area Management Plan (IAMP) that will document traffic volumes and interchange performance to define a level of service and to ensure that level will extend into the future.

Design of the Interchange

We are considering many factors such as safety, traffic flow, short and long-term transportation needs as we design the new interchange. During the development process, the design has been narrowed to a concept that minimizes the footprint of a full interchange. However, some private property may need to be acquired to construct the project. 
Diverging Diamond Interchange Diagram

The preferred design is called a Diverging Diamond. The concept image represents how ramps and roads connect to I-5. We are still exploring the locations of county roads and private-property accesses. Considerations include survey, environmental and traffic data, and conversations with property and business owners.

Reconstructing this interchange is a high priority of the Mid-Willamette Valley Area Transportation Commission, Marion County and ODOT.

Approximately 32,000 vehicles use Exit 278 Aurora-Donald or travel past the ramps entering and exiting I-5. The volume of traffic, proximity of roads and access points, and visibility issues cause congestion and safety concerns around the interchange. Built about 60 years ago for a much lower traffic volume, the interchange has been over capacity at peak times for many years.

It has significant safety issues and does not operate like a busy interchange should. Phase 1 construction will make improvements to the interchange and address some of the current issues.


Phase 1 Design 2020

Construction in 2022 (Bid Let 2021)


I-5 | ​Aurora-Donald Interchange (Exit 278)

Cost and Funding

The project was originally funded at $3.4 million. The Keep Oregon Moving transportation funding package, HB 2017, allocated nearly $25 million more for a total of $28.3 million to complete planning for the full interchange and design, and for construction of Phase 1.

$18 million will be used to construct Phase 1 improvements. Funding is not available for construction of a full interchange.

Contacts & Media

Project Area Map

Project Contacts

Transportation Project Manager
Anna Henson

Public Information Officer
Lou Torres

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Last Updated

12/4/2019 2:57 PM

Project Number


Project Documents

Related documents to this project
19062_I-5_Aurora-Donald_Interchange_November_2019_Presentation.pdfPresentation for November 12 city council meetings and November 13 open house.
K19062_I-5_Aurora_Donald_Aurora_Presentation_AURORA_3-12-19.pdfAurora City Council Presentation
pdfpresentation.pdfInformation on the preferred alternatives for the Aurora-Donald Interchange.
19062-AuroraDonald-snapshot.pdfA brief overview of the project with costs and benefits.

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