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SR 167, SR 509 and I-5 Puget Sound Gateway Project

SR 167 and SR 509 Puget Sound Gateway Project Map
View larger version of map .

November 2015

Puget Sound Gateway Project funding and phasing report.

What is the SR 509, I-5 and SR 167 Puget
Sound Gateway Project?

The SR 509, I-5 and SR 167 Puget Sound Gateway Project would relieve traffic congestion and improve freight mobility by completing the long-planned SR 167 and SR 509 corridor connections to I-5. The Gateway project is key to enhancing the state’s economic competitiveness, both nationally and globally, by connecting the state’s largest ports to key distribution centers in King and Pierce counties and to Eastern Washington.

The benefits of completing the SR 509, I-5 and SR 167 Puget Sound Gateway Project:

  • Completes the SR 509 and SR 167 connections to I-5 to improve mobility and connectivity in the Puget Sound region.
  • Relieves traffic congestion and completes critical freight links between the ports of Seattle and Tacoma and key distribution centers, warehouses, and industrial areas in King and Pierce counties. Supports regional job growth and economic growth at the state’s two largest ports.
  • Improves regional mobility and relieves congestion on local roads and highways by providing new, more efficient travel options.
  • Adds more capacity to I-5 through express toll lanes, reducing congestion and travel times between Seattle and Tacoma.
  • Supports master land use plans and economic development plans developed by cities in the Gateway corridors.

SR 509 and SR 167 History and Progress
For the past two decades there have been ongoing efforts to complete the SR 167 and SR 509 connections to I-5. Over the years, WSDOT has continued moving the corridor completion projects forward through environmental approvals, acquiring right of way and working on preliminary design.

In 2010, WSDOT completed toll feasibility studies for SR 167 and SR 509 which showed tolling could help raise revenue to fund the projects while also managing traffic volumes and creating an opportunity to phase construction. Further studies and traffic forecasts have reinforced that tolling is a key component to completing these critical corridors.

Tolling would provide an opportunity for phased construction of the project and allow capacity to be added strategically over time to meet the needs of corridors users and accomodate regional traffic growth in the future. Combining SR 167 and SR 509 into one project also provides opportunity for revenue sharing from an I-5 express toll lane system. 

SR 167 Phase 1 of the Gateway Project

  • Build one lane in each direction between SR 161 (Meridian Street) and Valley Avenue and build a second lane in each direction between Valley Avenue and 54th Avenue East
  • Replace Porter Way overpass
  • Complete the interchange at SR 161
  • Replace 70th Avenue East from 20th Street East to SR 99
  • Build new interchanges:
    • SR 167 at I-5
    • To/from east at 54th Avenue East
    • To/from west at Valley Avenue
    • To/from east at Freeman Road

View a map of the SR 167 Phase 1 improvements. 

SR 509 Phase 1 of the Gateway Project

  • Build one lane in each direction between South 188th Street and 28th/24th avenues south
  • Add second lane in each direction between I-5 and 28th/24th avenues south
  • Add truck climbing lanes in each direction as needed where steep grades exist
  • Complete the interchange at South 188th Street and SR 509
  • Replace the interchange at SR 516 to include new I-5 collector-distributor lanes between SR 509 and SR 516
  • Build a new southbound I-5 lane between SR 516 and South 272nd Street
  • Build new interchanges:
    • SR 509 and I-5
    • To/from the east at 28th and 24th avenues south
    • To South 231st Way and the Kent Valley

View a map of the SR 509 Phase 1 improvements.

Project Timeline
Prior to beginning construction, additional funding is needed to move forward with the critical next steps, which include environmental updates and approvals, completing the right-of-way acquisition, design updates and contracting. Additionally, there are opportunities for advanced mitigation projects that would help streamline the construction schedule.

The End Result
The ultimate goal is to construct the full Gateway vision for both corridors which includes two lanes in each direction on both SR 509 and SR 167 and completing all planned interchanges. The Gateway vision builds upon the initial investments from Phase 1, allowing capacity to be strategically added over time in order to meet the needs of corridor users and support regional growth.

Contact Us 
Amy Danberg
Public Information I-405/SR 167 Program

The Washington State Department of Transportation is a public agency and is subject to the State of Washington’s Public Records Act (RCW 42.56). Therefore, public comments and questions may be made available to anyone requesting them for non-commercial purposes.