Washington State Department of Transportation
October is here, which means the semiannual inspection closure of the Alaskan Way Viaduct is just around the corner.
Both directions of SR 99 will be closed between South Spokane Street and the north end of the Battery Street Tunnel from 6 a.m. to 6 p.m. on both Saturday, Oct. 31 and Sunday, Nov. 1. Please plan ahead and be prepared for additional congestion as a result of this closure.
Closing the viaduct will allow crews to thoroughly inspect the structure, as they do each spring and fall. Read our viaduct safety fact sheet (PDF 2.9 Mb) to learn more about what we do to keep the viaduct safe and open to drivers until the tunnel project is complete.