Seattle

Sammamish Announces Summer Road Projects: Traffic Delays and Lane Closures Expected

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Published on July 28, 2025
Sammamish Announces Summer Road Projects: Traffic Delays and Lane Closures ExpectedSource: Unsplash/ Jon Tyson

Drivers navigating the streets of Sammamish this week should prepare for some inconvenience, though major disruptions are not expected. According to a recent update on the city's website, CCTV technology will be employed for stormwater pipe inspections from today through August 1, promising minimal traffic disturbances with only occasional single-lane closures.

Meanwhile, Louis Thompson Road is set to reopen for two-way traffic as construction presses on for retaining walls and the installation of curb and gutter is expected to begin shortly after traffic's return, while delays continue courtesy of flagging operations, suggesting motorists may want to consider alternative routes during peak hours.

Lakeside Industries isn't taking a summer break either, as they grind and overlay new asphalt, adjust utilities on West/East Beaver Lake Drive SE through the end of July which means right lane closures and flaggers directing alternating traffic during work hours, typically from 7 a.m. to 4 p.m. Residents and commuters should prepare for possible delays, as detailed by the City of Sammamish.

Accessibility upgrades are also part of the summer overhaul, with sidewalk panel replacements at 16 locations and curb ramp replacements at two intersections, leading to temporary right lane closures in the designated areas until August 22. The effort to remove ADA barriers will see traffic control in place to ease the inconvenience for drivers.

As for road maintenance, King County has embarked on a nocturnal campaign of striping maintenance to brighten up those befuddled lines and raised pavement markers, activities that kick off post-sunset and wrap before the early bird's alarm, specifically from 9 p.m. to 6 a.m., when fewer cars roam the roads, according to the city's announcement.

For residents concerned about internet speeds and connectivity, there's a light at the end of the tunnel, as Ziply Fiber digs into the groundwork for its network. Commencing July 31 and stretching to August 7 along 228th Ave SE, expect the standard single-lane closures and the requisite signage and traffic measures to safeguard workers and passersby alike.

Seattle-Transportation & Infrastructure