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Project-Details





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

Construction Phase

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


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


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Impacts

Traffic Impact

Online Open House
Expect delays, and intermittent lane closures as needed.

Construction Impacts

There will be construction noise and construction vehicles entering and exiting the new alignment from Bents Road. 

Work is being done during the daytime, we expect to finish this phase in 2022.​

Expect delays on Ehlen Road and for traffic using I-5 exit 278 in both directions. Businesses will be open, but entry and exit will be impacted.

There will be a two week northbound ramp closure August 1-15. A detour route​ will be in place.​​

For the most up to date information, visit TripCheck.​

Meetings and Events

​Find out what road work is being done in 2022!

Visit our construction online open house to learn about the projects and the impacts to traffic that may occur as we work to build, repair and improve the roads that connect the communities of Region 2.

Sign up to receive future information about projects, road closures or invites to events. You can browse the different topics and sign up for the ones that interest you!

Details

About

In preparation for future reconstruction of the interchange, the current phase will:

  • Lengthen and widen the northbound off-ramp.

  • Build a sound wall along the northbound off-ramp. 

  • Realign Bents Road to align with Bents Court at Ehlen Road.

  • Install a new traffic signal at the new Bents Road and Ehlen Road intersection.​

In future phases we will:

  • Replace the I-5 bridges over Ehlen Road with one new bridge. ​

  • Reconstruct the I-5 travel lanes to match the new I-5 bridge.

  • Changing the section of Ehlen Road under the I-5 bridge to have two lanes of traffic in both directions and new accesses to the I-5 on and off-ramps.​

  • Lengthen and widen the southbound off-ramp, the southbound on-ramp and the northbound on-ramp –  completely upgrading all freeway ramps.

  • Relocate the Dolores Way and Ehlen Road intersection to the east. ​

Background

We completed the Interchange Area Management Plan (IAMP) that documents the traffic volumes and interchange performance in order to define a level of service and to ensure that level will extend into the future.  The IAMP establishes an agreement with local government and stakeholders on the transportation solutions, policies, and actions needed to improve the interchange.

The IAMP and the appendix files are available in the document library at the bottom of this page.

Design of the Interchange

We considered many factors such as safety, traffic flow, short and long-term transportation needs as we designed the new interchange. During the development process, the design was narrowed to a concept that minimizes the footprint of a full interchange. However, some private property will 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. The design realigns some of county roads and private-property accesses. Considerations included survey, environmental and traffic data, and conversations with property and business owners. These are all documented in the IAMP.

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

Daily, 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.

Schedule

Phase 1A Design through 2021
Construction in 2022

Location

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

Cost and Funding

The project was originally funded at $3.4 million. House Bill 2017 allocated nearly $25 million more for a total of $28.3 million to complete planning and design for the full interchange and for construction of Phase 1.

$11.5 million will be used to construct Phase 1A improvements. Funding is not available for construction of a full interchange.

Contacts & Media

Phase 1A Project Area Map

Project Contacts

Project Manager
Dave Davies
Email
dhd@deainc.com
Phone
503-931-0969

Assistant Resident Engineer
Astrid Potter
Email
astrid.j.potter@odot.oregon.gov
Phone
503-986-2683

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Last Updated

8/2/2022 5:07 PM

Project Number

19062

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_A-D_IAMP_Final.pdfFinal IAMP
19062_All_Appendices.pdfIAMP Appendices