I-5 - SR 161 - SR 18 Triangle Interchange Vicinity - Improvements

Project overview

This project has been suspended. There is no timeline for when it may resume.

Timeline

2010-TBD

Project status

Pre-construction

Funding

$85 Million

What to expect

This project has been suspended, travelers should not expect to see construction-related delays in the area.

View full image

This map shows the locations of improvements planned for the I-5/SR 161/SR 18 interchange in Federal Way, WA.

Stay informed by subscribing to our email updates

History and background

This project has been suspended. In 2010, we began a long-term program to improve mobility in Federal Way around the I-5/SR 18/SR 161 interchange, known as the “Triangle.” Traffic in the area has increased beyond what the original interchange was designed to handle, with about 293,000 vehicles moving through this interchange every day. Frequent backups, particularly during peak travel times, are common.

In 2012 we completed flyover ramps between I-5 and SR 18. There is no timeline for completing additional work in this area.

This project is being constructed in stages. The first stage was completed in 2012. The remaining stages have been suspended, with no date for completion scheduled.

Milestone

2012

Stage one completed

2011-2017

Preliminary design for Stage 2A

2021-2023

Design and engineering for stages 2A and 2B

2023

Project suspended; no date for resumption scheduled.

I-5 - SR 161 - SR 18 Triangle Interchange Vicinity - Improvements

Project overview

What to expect

History and background

Website feedback: Tell us how we're doing.

Learn more about work zone safety

Slow down – lives are on the line.

Even one life lost is too many.

It's in EVERYONE’S best interest.