Demolishing the SR 99 bridge over Broad Street SR 99 Tunnel Project Existing SR 99 bridge over Broad Street Yellow indicates where Broad Street used to be. This area will be transformed to make room for future connections to the SR 99 tunnel’s north portal. Mercer St Aurora Ave N Harrison St N Alaskan Way Viaduct REPLACEMENT PROGRAM Mercer St SR 99/Aurora Ave N N Harrison St Today When SR 99 tunnel opens SR 99 Tunnel Entrance