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The original item was published from 7/19/2022 2:15:00 PM to 7/26/2022 12:00:05 AM.

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Traffic Alerts

Posted on: July 19, 2022

[ARCHIVED] Traffic Alert: SR 18 Closure Between I-90 and Issaquah-Hobart Road

Please be advised of an upcoming closure of state Route 18 between Interstate Highway 90 and Issaquah-Hobart Road on July 23 between 6 a.m.-8 p.m. WSDOT maintenance and engineering teams will be working on-site.


Both directions of SR 18 will be closed from 6 a.m. to 8 p.m. 

  • Westbound SR 18 will be closed at the I-90 interchange in Snoqualmie. Local access only is allowed for residents to reach Southeast 104th Street. 
  • Eastbound SR 18 will be closed at Issaquah-Hobart Road. 
  • The ramp from Issaquah-Hobart Road to eastbound SR 18 will also be closed. 

Know Before You Go

Highway users should plan to allow extra time and use alternate routes to reach their destinations.

Work Planned

During the closure, WSDOT maintenance crews and engineering teams from the SR 18 Issaquah-Hobart Road to Deep Creek widening and the I-90/SR 18 interchange improvement projects will work in multiple areas. Coordinating schedules and advance planning allows all three groups to accomplish tasks in a single daylong closure, reducing the cost of traffic control and inconvenience to highway users.

  • Paving crews will repair failing pavement and fill potholes, primarily in the eastbound lanes. They also plan to work on highway drainage, guardrail repairs, and cut back brush and tall grass to improve highway sight lines in both directions of the highway.
  • The engineering project team is taking advantage of the closure to gather information and data for the planned widening of the highway. One team will drill through asphalt to gather samples while others will take highway measurements, perform survey work and collect information needed for the state and federal permits required before the highway is widened. 
  • Contractor crews for the interchange improvement project will also be on site performing pavement inspections, reviewing conditions of existing bridges and survey work. 

Have questions? For maintenance and SR 18 widening, please contact Kris Olsen, communications, 206-440-4704. For I-90/SR 18 interchange, please contact Adrienne Hatmaker, communications, 206-573-0524.