• Project

SR 99 tunnel

Project overview

The SR 99 tunnel replaced the Alaskan Way Viaduct along Seattle's central waterfront, carrying State Route 99 beneath downtown Seattle. The 2-mile tunnel opened to drivers in February 2019.

Timeline
2009 - 2019
Project status
Completed
Funding
$2.15 Billion

What to expect

The SR 99 Tunnel is open to drivers. The tunnel is a tolled facility with rates changing on a fixed schedule, depending on the time of day. Drivers with Good To Go! passes pay the lowest rates.

The SR 99 tunnel runs between just west of Seattle's sports stadiums and north of downtown near the Space Needle. The tunnel has no mid-tunnel entrances or exits.