Alaskan Way Viaduct to close overnight Saturday

Washington State Department of Transportation

Both directions of State Route 99 will close overnight Saturday between the West Seattle Bridge and the north end of the Battery Street Tunnel.

The closure – which will last from Saturday, Dec. 6 at 11:59 p.m. to 5 a.m. Sunday, Dec. 7 – will allow crews to move heavy equipment across the roadway and conduct survey work on SR 99.