Local Information

Prepare for two weekends of closures of SR 9 near Marysville for roundabout installation

Thursday, August 22, 2019 - 14:50

Update: Work originally planned for 9 p.m. Friday, Sept. 20 to 5 a.m. Monday, Sept. 23 has been postponed. The closure is now scheduled for 5 a.m. Saturday, Sept. 28 to 5 a.m. Monday, Sept. 30. This work is weather-dependent.

Frances Fedoriska, communications, 206-440-4690
Mark Sawyer, project engineer, 425-225-8799

Project will improve safety at intersection

MARYSVILLE – Next month travelers will need to plan ahead to navigate back-to-back weekend-long closures of State Route 9 at 108th Street Northeast. During each of the two closures, contractor crews working for the Washington State Department of Transportation will build one-half of a single-lane roundabout at the intersection. This work will occur:

  • 9 p.m. Friday, Sept. 6 to 5 a.m. Monday, Sept. 9 - postponed
  • 9 p.m. Friday, Sept. 20 to 5 a.m. Monday, Sept. 23 - postponed
  • 5 a.m. Saturday, Sept. 28 to 5 a.m. Monday, Sept. 30

Detour routes will be signed. Residents will be granted local access.
The closures are weather-dependent.

A history of collisions
Roundabouts have a proven record of reducing injury collisions by 75%. Right now, nearly 10% of the 16,000 drivers who use this intersection every day are attempting turns from the stop signs at 108th onto SR 9. Turning from a stop onto a highway increases the risk of collision. The new roundabout will reduce the severity of collisions and wait times at the intersection. Between 2012 and 2017:

  • More than 50 people were injured in 28 collisions at SR 9 and 108th Street Northeast.
  • Ten collisions were rear-end crashes.
  • At least six of those collisions happened at the stop signs on 108th.

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