Tunnel and overpass construction to close State Route 99 ramps and lane in SODO this weekend

Posted on Nov 13 2013 5:00 PM

If your Saturday plans include a trip to SODO, you can cross the State Route 99 ramps near the stadiums off your list of route options.

Crews working for contractors building the SR 99 tunnel and the South Atlantic Street overpass will close the on-ramp from South Royal Brougham Way and the off-ramp to South Atlantic Street for much of the weekend. The right lane of southbound SR 99 will also be closed south of downtown Seattle. The ramps and lane will reopen two hours before the kickoff of Sunday’s Seahawks game at CenturyLink Field. 

Closure details

Friday, Nov. 15 – Sunday, Nov. 17

  • The right lane of southbound SR 99 between South King and South Atlantic streets, as well as the southbound off-ramp to South Atlantic Street, will be closed from 10 pm. Friday, Nov. 15 to 11 a.m. Sunday, Nov. 17.
  • During the lane and ramp closure, crews will remove steel and timber beams that supported construction of the new South Atlantic Street overpass. The overpass is scheduled to open by the end of 2013.


Saturday, Nov. 16 – Sunday, Nov. 17

  • The South Royal Brougham Way on-ramp to northbound SR 99 will be closed from 7 a.m. Saturday to 10 a.m. Sunday.
  • During the closure, crews will install drainage and move a power pole.

The overpass and tunnel ramp work are both part of the Alaskan Way Viaduct Replacement Program.

Drivers can stay up to date with all closures and roadway conditions by checking the Seattle traffic page, the What’s Happening Now page, or WSDOT mobile app.