South Downtown I-405 Access Study

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I-405 corridor in Bellevue
I-405 Access Study Online Open House: Aug. 3-21

View the proposed alternatives and share your thoughts

There are six interchange preliminary alternatives (locations and configurations)  under consideration. Click the button below to learn about each alternative and give your feedback on some or all of them. The Online Open House is available in: English, 日本語 (Japanese), 한국어 (Korean), Pусский (Russian), 简体中文 (Simplified Chinese) and Español (Spanish).

The City of Bellevue continues to grow, with the new Link light rail East Main Station opening in 2023, plans to further develop south downtown Bellevue and the I-405 Bellevue to Renton Express Toll Lane expansion opening in 2024. The City of Bellevue wants to minimize traffic congestion and help people get where they need to go, whether they are walking, biking, riding transit or driving.

The City of Bellevue and the Washington State Department of Transportation (WSDOT) are partnering to study a new interchange to access I-405 in south downtown Bellevue.

Study Underway

Vicinity map of the South Downtown I-405 Access Study
Access Study Vicinity Map. Click image to enlarge

The I-405 Master Plan envisions a new interchange in Bellevue, south of Northeast Fourth Street. We are developing, evaluating and identifying options to complete as part of the I-405 Master Plan.

Proposed development along 114th Avenue Southeast, near the East Main light rail station and within the Wilburton area has created a pressing need to identify a preferred interchange option. Selecting a preferred option will enable the city to communicate to property owners and developers about right-of-way needs and site access options.

We need to develop a cost estimate to seek future funding opportunities.

This study builds upon WSDOT’s 2015 analysis where they evaluated eight potential access options at several locations between Northeast Second Street and Southeast Eighth Street.


South Downtown i-405 Access Study Timeline graphic
South Downtown I-405 Access Study Timeline Graphic.

Community Engagement

The city is engaging people who live, work, or travel through the study area through interviews, forums and online open houses to gain perspective on options to improve access in south downtown Bellevue. We aim to share the purpose and need of the study, interchange options, the evaluation process and gather community input.

Coming soon! Online Open House, Aug. 3-21

Several preliminary alternatives (locations and configurations) will be available online to provide your feedback. 

Study materials