Cone Zone

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Updated 4/18/25

Stormwater Pipe Inspection

Crews will inspector stormwater piped on Issaquah Pine Lake Road between 228th Avenue Southeast and Southeast 32nd Way from April 21–April 25. Traffic disruptions will be minimal, with only occasional single-lane closures expected. Appropriate signage and traffic control measures will be in place to ensure the safety of both workers and the public.

2025 Citywide Traffic Counts

The City of Sammamish will collect traffic counts throughout the city from April 28-May 12. Tubes will be placed on main roadways to collect traffic volumes and cameras will be setup at intersections to record vehicle movements. This equipment will not impact traffic, however they may be felt when driving over them. Drivers should also use caution when passing the contractor’s vehicles when stopped on the side of the road to place tubes or check on their equipment. For more information, please see the city’s webpage about the traffic counts program below.

https://www.sammamish.us/government/public-works/traffic-engineering/citywide-traffic-counts/

Ziply Fiber Restoration Work

The Ziply permits are currently suspended by the City of Sammamish. Ziply is still allowed to perform restoration work associated with previous construction activities. Restoration activities include soft surface replacement, asphalt patching, and sidewalk replacement.

WSDOT Traffic Alerts

Traffic Alert: I-90 Lane Closures

Washington State Department of Transportation (WSDOT) crews are continuing repairs on the Interstate 90 project, which will have congestion impacts, especially during peak travel time. These are a continuation of repairs WSDOT began in summer 2022. While this work is occurring, please plan ahead and allow extra time.

State Route 18 Closures

People who use State Route 18 should expect slight traffic shifts during the daytime commute and intermittent nightly lane reductions. This may be as early as 8 p.m. Mondays through Thursdays, with all lanes reopening by 5 a.m. Flaggers will direct motorists when traffic is reduced to one lane. People should continue to plan extra time for their trips, as contractor crews work to widen the highway and redesign the interchange.

More information can be found here: https://wsdot.wa.gov/construction-planning/search-projects/i-90-sr-18-interchange-improvements