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Cone Zone

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Updated 4/12/24

2024 Citywide Traffic Counts

The City of Sammamish will be collecting traffic counts throughout the city on April 15-28. Tubes will be placed on main roadways to collect traffic volumes. These tubes will not impact traffic, however they may be felt when driving over them, drivers should not be alarmed. Also drivers should 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.

Gas Main Replacement: 212th Ave SE and Vicinity

Starting the week of April 15 and for approximately one month, PSE will be working on a gas main replacement on 212th Ave SE, SE 27Th St, SE 28Th Pl, SE 32nd and SE 34th St. Work will take place between the hours of 8 am – 3:30 pm. Traffic control will be used, some delays expected.

Louis Thompson Hill Road

There will be lane restrictions on Louis Thompson Hill Road April 8 through May 3 for Puget Sound Energy (PSE) gas main relocations in the roadway. Flaggers will be implementing traffic control weekdays from 7 am – 4 pm. PSE is completing this work in advance of the City’s road improvement construction planned for this summer.

Pedestrian Signal Revisions

The city has made signal revisions at several locations on 228th to reduce wait times and improve pedestrian mobility. These revisions will allow left turns to happen while yielding to pedestrians crossing north-south. The city will analyze intersections and selectively implement this at locations where pedestrians experience frustratingly long wait times.

The first intersections scheduled for this change are 228th and E. Main St. and 228th and NE 12th. New signage will warn drivers to yield to pedestrians when turning left.


Notices for construction activity outside of the City of Sammamish:

Road maintenance on 244th Ave NE near Redmond Fall City Rd (SR-202)

This is a King County Local Services project.

Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2024. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project.


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: