State Route 167 is one of the busiest and most important corridors in the Puget Sound region. It connects people to jobs and essential services, keeps freight moving, and links communities across South King and Pierce counties. But like many growing areas, it’s also facing increasing congestion and travel challenges.
That’s why we’re continuing work on the SR 167 Implementation Plan, the next step in turning a long-term vision into real, on-the-ground improvements.
What is the Implementation Plan?
A few years ago, we worked with communities and partners along the corridor to develop the SR 167 Master Plan. That effort identified a range of multimodal improvements and strategies to help address safety, mobility, and access along the corridor.
Now we’re building on that work.
The Implementation Plan focuses on identifying which projects to advance and how they align with funding and phasing. It builds on the Master Plan by outlining the technical work required to move projects forward, including early engineering, traffic analysis and cost estimating.
Our goal is to identify one or more packages of projects and outline the level of funding that would be needed to deliver them. Those recommendations will be shared with the Legislature to help inform future decisions about transportation investments.
How we’re evaluating projects
One of the most important parts of this work is figuring out which projects rise to the top.
We’re using the goals established in the SR 167 Master Plan to guide our evaluation. That includes looking at how each project or package performs across a range of factors, such as:
- Improving safety performance for people traveling on and across the corridor
- Supporting reliable travel for people and freight
- Expanding travel options, including transit, walking, biking, and rolling
- Reducing environmental impacts and supporting healthier communities
- Improving access for communities that have been historically underserved
- Making sure solutions are practical, deliverable, and a good use of public funds
We’re also looking at how projects work together. Instead of focusing on individual projects in isolation, we’re evaluating how groups of projects can be packaged and phased to deliver the greatest overall benefit for the corridor.
Working with partners every step of the way
We’re not doing this alone.
We’re working closely with cities, counties, transit agencies, freight, and community representatives throughout the corridor. That includes the SR 167 Equity Advisory Committee, which helps make sure community perspectives are part of the process.
Together, we meet regularly to review projects, talk through priorities and shape how projects could be grouped and delivered. This collaborative approach helps us balance technical analysis with what matters most to the people who commute, live and work along SR 167.
We’ll wrap up this effort with a final report to the Legislature in December 2026.
A new webpage to follow along
We recently launched a new webpage dedicated to the SR 167 Implementation Plan. It’s the best place to find background information, track progress, and stay up to date as the work continues.
If you’re interested in the future of the corridor, we encourage you to check it out and follow along.
See us in your community this summer
We’re also getting out into the community.
This summer, our team will be visiting neighborhoods along the corridor to share information and answer questions. You’ll be able to find us at local fairs and festivals, where we’ll be talking about what we’re studying and what it could mean for the future of SR 167. Here’s a look at where you can find us this summer:
- June 20–21, 2026: Sumner Rhubarb Days
- July 10–12, 2026: Kent Cornucopia Days
- July 18, 2026: Edgewood Summerfest
- July 24–26, 2026: Renton River Days
- Aug. 14–15, 2026: Milton Days
If you see us at an event, stop by and say hello. We’d love to talk with you.
What’s next
The Implementation Plan is a key step in moving from planning to delivery. By combining technical analysis with input from our partners and communities, we’re working toward a clear path forward for the corridor.
We’ll continue to share updates as the work progresses and let people know about opportunities to get involved. If you have any questions, please email I405SR167Program@wsdot.wa.gov. You can also sign up for email updates.
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| Illustrative drawing of potential SR 167/SR 18 interchange improvements that may be included in the recommended package of projects |
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| Illustrative drawing of Kent Direct Access, which may be included in the recommended package of projects |











