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June 2014
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CityLink Seattle

Southbound SR 99 to close through Seattle this weekend

Washington State Deparment of Transportation

Traffic Advisory

Southbound State Route 99 will close through Seattle this weekend to allow crews building the SR 99 tunnel to shift traffic to a new southbound routing (pdf 769 Kb) of the highway near the stadiums.

Closure details

  • Crews will close all lanes of southbound SR 99 between Denny Way and South Spokane Street from 10 p.m. Friday, June 6 to 5 a.m. Monday, June 9.
  • The right lane of southbound SR 99 between South King and South Atlantic streets and the southbound SR 99 off-ramp to South Atlantic Street will close earlier, at 7 p.m. Friday, June 6.

Crews will complete a similar shift of the northbound lanes during the June 20-23 weekend.

The shifts will make room for STP to continue construction of lanes and ramps that will connect to the SR 99 tunnel.

Traffic will stay in the new configuration until the tunnel opens to traffic. Drivers should expect initial congestion and delays after each traffic shift as travelers adjust to the new routings. Drivers can help keep traffic moving by keeping an eye on the road and other drivers.