SR-530/Smokey Point Blvd Roundabout

Project Description

Every weekday approximately 26,000 vehicles pass through Island Crossing.  The volume of traffic on SR-530 has increased so much that accessing onto SR-530 from uncontrolled intersections during morning and evening peak traffic is extremely dangerous.  This is especially so at the Smokey Point Blvd. intersection where 4,500 vehicles a day access onto SR-530.  Arlington worked with WSDOT to install a temporary traffic signal at the intersection of Smokey Point Boulevard and SR-530 while a permanent solution is implemented, the design and construction of a roundabout.  The planned roundabout will increase safety, increase mobility and reduce backups. The temporary signal will remain as the City continues to work with WSDOT and stakeholders on the roundabout.  The SR-530 Roundabout project will include a single lane roundabout (expandable to two-lane), crosswalks, center medians, sidewalks and street lighting.

Project Team

This project is being completed as a partnership with the following team members:

  • City of Arlington
  • Snohomish County
  • Stillaguamish Tribe of Indians
  • Washington State Department of Transportation

Project Benefits

  • Improve mobility
  • Increase traffic safety
  • Relieve congestion and backup
  • Improve pedestrian safety

Project Cost and Funding

  • Engineer’s estimated cost TBD
  • Funding by: TBD

Project Schedule

  • Design Completion 2021
  • Construction: TBD

Coordination with Local Businesses

The Project Team will coordinate with local Island Crossing businesses and with the community prior to construction of the roundabout. Regular schedule updates will be provided by the City to keep local businesses and the community apprised of progress on the project, and potential impacts.


If you have questions, concerns or would like more information on this project, please contact the City Project Hotline at 360-403-3544 or by email at


Island Crossing Design plan

Project Documents

To translate documents, download the document then click the link: 

Project Updates

  • Monitoring well have been installed to measure ground water levels over the wet season in order to accommodate the stormwater design.
  • The Channelization Plan has been approved by WSDOT and design is scheduled to be complete in 2021.
  • August 8, 2023 - Project is in the NEPA process (environmental review), once NEPA is complete we can complete right-of-way transactions.  Looking for federal construction funding.