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WSDOT contractor crews from Road Construction Northwest, Inc. used the old westbound I-90 weigh station property to create a second on-ramp lane for highway users. The traffic signal on SR 18 was also retimed, and ramp meters were added to evenly distribute vehicles merging onto westbound I-90.
These modifications are expected to provide some short-term congestion relief and help improve traffic flow on Snoqualmie Parkway, and nearby local intersections (such as SE 96th, 99th and Jocobia streets), before the new I-90/SR 18 interchange project is complete in 2023.
Travelers will see the following changes:
Why meter the on-ramp?
The ramp meters will operate during peak commute times - activating automatically based on westbound I-90 traffic flow. Metering the two-lane on-ramp will reduce congestion on westbound I-90 by providing consistent gaps between vehicles, rather than allowing multiple vehicles to flood the highway at once.
An additional modification to the on-ramp will also occur before the new I-90/SR 18 interchange opens in 2023.
Travelers should check the King County construction page or sign up for weekly email updates for current closure information. For more project photos, check the WSDOT Flickr page.
This $1.03 million project was jointly funded by WSDOT and the city of Snoqualmie.
