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The original item was published from 8/26/2022 10:49:00 AM to 9/16/2022 12:00:07 AM.

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Traffic Alerts

Posted on: August 18, 2022

[ARCHIVED] Traffic Alert: East Lake Sammamish Parkway

The East Lake Sammamish Parkway and Southeast 43rd Way roundabout is scheduled be closed from 2 a.m. Aug. 27 - 5 a.m. Aug. 29 for striping and repairs. This is the final roundabout closure for this project. 

A detour will be provided through the City of Sammamish.


This project will revise the roundabout to improve safety and mobility for all users. Improvements will include:

  • New curb alignments and lane configurations - to reduce traffic speeds through the roundabout
  • Paved approach islands – to reduce maintenance efforts and damage occurring within these islands
  • Permanent removal of the southbound bypass lane on East Lake Sammamish Parkway and conversion to landscaping – to reduce vehicle merging conflicts
  • Rectangular Rapid Flashing Beacons (RFFBs) installed at each crosswalk – to improve pedestrian visibility and awareness
  • Radar Speed Signs - to reinforce the recommended 15-mph speed through the roundabout.
  • New pavement and striping

 Later this fall, City crews will install radar speed signs, rapid flashing beacons and plant shrubs as the weather cools. Landscapers are currently planting trees.

Hours and Impact

Normal work hours will be Monday-Friday, from 7 a.m.-6 p.m., and will require some single lane closures. You should expect minor traffic delays during working hours. Please be aware of workers near the roadway.

Residents can expect some noise impacts such as engine noise, reverse beepers, and general machinery, as well as flashing lights at night during these closures. Thank you for your understanding.


If you have questions or concerns with this project, please contact Utility Engineering Manager Matt Ellis at 425-837-3410.

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