The new SR 99 tunnel under downtown Seattle
Get ready: the #Realign99 highway closure begins Jan. 11, 2019 and viaduct demolition begins in February.
Getting around using the tunnel
The new tunnel will provide a direct route under downtown from the stadiums to the Space Needle. The south end connects to Alaskan Way and downtown, the north end connects to Seattle Center and South Lake Union.
SR 99 Grand Opening Celebration
WSDOT invites you to experience the new tunnel, say goodbye to the viaduct, and hello to the future waterfront. Activities will take place on Saturday, Feb. 2, and Sunday, Feb. 3, and include a walk through the tunnel, STEM activities, art festival on the viaduct, an 8K fun run/walk, and 12-mile bike ride.