Nighttime lane closures this week on SR 99 and First Avenue South

Washington State Department of Transportation Alaskan

Drivers should expect nighttime closures this week on the southbound lanes of State Route 99 and First Avenue South near Seattle’s stadiums.

Tuesday night, Sept. 8 to Friday morning, Sept. 11

  • The left lane of southbound SR 99 will be closed between South King Street and South Royal Brougham Way each night from 10 p.m. to 6 a.m.
  • A short section of the right lane of southbound First Avenue South will be closed just south of Railroad Way South each night from 10 p.m. to 6 a.m.

During the closures, Seattle Department of Transportation crews will conduct maintenance work on SR 99 near the stadiums.

For more information about Alaskan Way Viaduct Replacement Program, visit