Closure of SR 99 in Seattle starts FridayDrivers should prepare for a full closure of SR 99 from South Spokane Street to Valley Street starting at 10 p.m. Friday after the Seahawks game. That strech will remain closed until 5 a.m. Monday when the closure moves to the south end of the Battery Street Tunnel to Valley Street. The highway will reopen by 5 a.m. Wednesday, August 27. During the closure, crews will do a variety of work related to the Alaskan Way Viaduct replacement project. Drivers should consider using alternate routes, adjusting their schedule if possible and plan for heavy congestion and delays. For details about all of today's closures, check out our What’s Happening Now webpage.