The new SR 99 tunnel under Seattle

New route through Seattle

Viaduct closure and tunnel opening

Drivers should start making plans for a 3-week SR 99 closure coming as soon as this fall. When the closure ends the SR 99 tunnel will be open, offering new route options to and around downtown Seattle.

Learn more about the Realign99 closure >

Alaskan Way Viaduct demolition

Viaduct removal

The tunnel is part of WSDOT's program to replace the Alaskan Way Viaduct. Viaduct removal and the filling of the Battery Street Tunnel will begin shortly after the new tunnel opens to drivers.

Read more about removal >

Good To Go! tolling

Tolls in the tunnel

The tunnel will be free to use when it first opens. The Washington State Transportation Commission is currently considering possible options for toll rates in the tunnel.

Learn how tolling will work >