I-90 - Eastgate to SR 900 Peak Use Shoulder Lanes

Project news

Why is WSDOT building this project?
As population grows in the Puget Sound region, so does traffic congestion. In an effort to ease congestion along this heavily traveled portion of I-90, WSDOT is creating peak use shoulder lanes from Eastgate to SR 900. These shoulders will add additional capacity during the morning and afternoon commutes.

The End Result
The project will reconstruct shoulders along both directions of I-90 from Eastgate to Issaquah to serve as additional lanes during the morning and afternoon commutes. New overhead electronic signs will let drivers know if the peak use shoulder lanes are open and closed. In addition, the project may retrofit and construct new noise barriers in some places along the improved route.

The eastbound I-90 peak use shoulder lane is proposed between the Eastgate Interchange and West Lake Sammamish Parkway. The westbound peak use shoulder lane is proposed between SR 900 and the 150th Ave SE exit.

Drivers may use the peak use shoulder lanes during the following times:
Eastbound I-90: 3 p.m. to 7 p.m.
Westbound I-90: 6 a.m. to 9 a.m.

With the exception of buses, vehicles over 10,000 gross vehicle weight will be prohibited from using the lane.

Needs & benefits

By building more capacity to handle large volumes of traffic on I-90, we expect to improve congestion for travelers.


  • Design: 2016 to early 2018
  • Construction: 2018 - 2020

Financial Information

Financial Data for PIN 109052P
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $0
CWA $73,200
Total $73,200


Emily Mannetti
Public Information