Construction notifications

Construction closures and nighttime noise work

Cones blocking the ramp entrance to Alaskan Way Viaduct
This page contains SR 99 and Seattle street closures due to work on the Alaskan Way Viaduct Replacement Program. See bottom of page for other traffic resources from around the region.


SR 99 MAINLINE AND RAMP CLOSURES IN SEATTLE

Last updated: February 12, 2018

  • March 24-25: The Alaskan Way Viaduct will close for its semi-annual inspection. More details to come.

UPCOMING NIGHTTIME NOISE WORK

Last updated: February 12, 2018

SR 99 Tunnel Project

  • Work continues 24 hours a day, Monday - Saturday at the tunnel's north portal as crews build the future SR 99 roadway in the disassembly pit near Harrison St and Sixth Avenue North. Contractor Seattle Tunnel Partners is planning multiple nighttime concrete pours in the upcoming weeks.

View notice

SR 99 Connections Project

  • Feb. 20: Crews will conduct one night of work to restripe E. Frontage Road between S. Atlantic St and Royal Brougham Way, plus small sections of S. Atlantic St and Royal Brougham Way adjacent to the construction site.

View notice