The new SR 99 tunnel under Seattle

New route through Seattle

New route through Seattle

The SR 99 tunnel will provide a direct route from the stadiums to the Space Needle. When the tunnel opens, drivers will have new options for getting to and around downtown Seattle.

Learn how routes will change >

Alaskan Way Viaduct demolition

Viaduct demolition

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

Read more about demolition >

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 >