The Battery Street Tunnel connects the north end of the Alaskan Way Viaduct to Aurora Avenue North. It was constructed in the 1950s and has not been upgraded since.
Until the viaduct is taken down, WSDOT and the City of Seattle are conducting regular maintenance on the tunnel and repairing its fire and life safety systems, as needed. This will ensure it remains safe for drivers.
The Battery Street Tunnel will be closed and filled in 2016 after the new SR 99 tunnel opens to traffic.