• Project

I-90 - Snoqualmie Pass East - Cabin Creek Interchange to West Easton Interchange (Phase 3)

Project overview

Phase 3 is part of a 15-mile corridor improvement project to improve safety and reliability and reduce congestion along I-90 from Hyak to the Easton vicinity. We are increasing traffic capacity and improving safety by adding a new lane in each direction, replacing concrete pavement, stabilizing rock slopes, building wildlife crossings, improving sight distance and traffic safety and improving traffic management technology systems.

Summer 2022 - Fall 2028
Project status
$335 Million

What to expect

Construction is underway. Eastbound traffic is shifted to the westbound side of I-90 between mileposts 68 and 70. This traffic shift maintains two lanes of traffic in both directions and will remain in place for the next several years as crews work to build new lanes. Travelers need to be aware the two-mile bypass around the construction zone has narrow lanes and shoulders. Travelers can expect full one-hour closures an hour before sunset several times a week for rock blasting between August and October.

Travelers can learn more about travel impacts this summer by visiting our online open house. 


Phases 3 and 4 of the I-90 Snoqualmie Pass East project widens I-90 from four to six lanes, stabilizes rock slopes, builds bridges, adds truck-climbing lanes, straightens curves and connects wildlife habitats.