US 2 - SR 204 - 20th Street SE Interchange Justification Report

US 2 SR 204 Study Map

Study Status


In 2016 the Washington State Legislature directed WSDOT to study potential improvements to the US 2, SR 204, and 20th Street Southeast interchange near Everett. The summary was provided the Legislature in mid-September.

In December 2016, WSDOT formed a project support team of representatives from Snohomish County, Community Transit, and the cities of Lake Stevens, Everett, Snohomish, Monroe and Marysville. This team worked to identify existing issues and potential future improvements at the interchange. The project support team provided feedback and direction on the future potential improvements throughout the duration of the study.

In spring 2017 the public had an opportunity to provide input on issues and needed improvements through an online survey. Additionally, WSDOT provided updates to the public through the community briefings, gathering additional community input. 

WSDOT used findings from the support team and public survey to develop an Interchange Justification Report. These reports are studies required by the Federal Highway Administration to support changes to highways.

Why is WSDOT studying the US 2, SR 204, 20th Street Southeast interchange?

The population of Snohomish County has more than doubled since 1980 and is expected to gain another 200,000 residents by 2035. This growth will add pressure to the county’s high-traffic routes, including the US 2, SR 204 and 20th Street Southeast interchange, which already experiences severe congestion during peak commute times. These backups can sometimes spill over onto other highways and surface streets, creating additional congestion.

The end result

The final study will assist the Legislature’s plans and decision-making for future projects to improve the US 2, SR 204 and 20th Street Southeast interchange.

Study benefits

  • Public involvement: Driver and community input was incorporated into the final study provided to the Legislature, ensuring that potential future improvements work for highway users.
  • Stakeholders: Key representatives from various agencies and jurisdictions provided feedback and direction to ensure that any potential future improvements reflect area needs and are coordinated with local agency road projects and improvements.
  • Informs future decisions: At the end of this study, WSDOT provided a list of unfunded projects that the Legislature can use in the future to make decisions about the interchange.

What is the study timeline?

  • ​Winter 2016 – spring 2017: Project support team developed potential future improvements
  • Early spring 2017: Public outreach via an online survey 
  • Spring 2017 – winter 2017: Analysis of potential design options
  • Winter 2018 – spring 2018: Select Preliminary Preferred Alternative and document findings
  • September 2018: Final study delivered to the Legislature

Financial information

The Legislature allocated $1.5 million for this study through the 2016 supplemental transportation budget.

How can I get more information?

Kris Olsen