![Seattle, Washington: The northbound entrance of the new SR 99 Tunnel. The two mile long, bored road tunnel is replacing the Alaskan Way Viaduct, carrying State Route 99 under downtown Seattle from Seattle, Washington: The northbound entrance of the new SR 99 Tunnel. The two mile long, bored road tunnel is replacing the Alaskan Way Viaduct, carrying State Route 99 under downtown Seattle from](https://c8.alamy.com/comp/R22AM4/seattle-washington-the-northbound-entrance-of-the-new-sr-99-tunnel-the-two-mile-long-bored-road-tunnel-is-replacing-the-alaskan-way-viaduct-carrying-state-route-99-under-downtown-seattle-from-the-sodo-neighborhood-to-south-lake-union-e-of-the-art-tunnel-credit-paul-christian-gordonalamy-live-news-R22AM4.jpg)
Seattle, Washington: The northbound entrance of the new SR 99 Tunnel. The two mile long, bored road tunnel is replacing the Alaskan Way Viaduct, carrying State Route 99 under downtown Seattle from
![Washington State Department of Transportation—State Route 99 Tunnel Project – America's Transportation Awards Washington State Department of Transportation—State Route 99 Tunnel Project – America's Transportation Awards](https://americastransportationawards.files.wordpress.com/2020/08/03_sr99tunnel_goingtowork.jpg)
Washington State Department of Transportation—State Route 99 Tunnel Project – America's Transportation Awards
![Seattle, Washington, USA. 4th January, 2019. Southbound traffic passes the future onramp of the SR 99 Tunnel as the Washington State Department of Transportation prepares for the highway's permanent closure. A two-mile Seattle, Washington, USA. 4th January, 2019. Southbound traffic passes the future onramp of the SR 99 Tunnel as the Washington State Department of Transportation prepares for the highway's permanent closure. A two-mile](https://c8.alamy.com/comp/RAN30F/seattle-washington-usa-4th-january-2019-southbound-traffic-passes-the-future-onramp-of-the-sr-99-tunnel-as-the-washington-state-department-of-transportation-prepares-for-the-highways-permanent-closure-a-two-mile-long-bored-road-tunnel-is-replacing-the-alaskan-way-viaduct-carrying-state-route-99-under-downtown-seattle-from-the-sodo-neighborhood-to-south-lake-union-the-viaduct-is-scheduled-to-close-permanently-on-january-11-so-crews-can-move-state-route-99-from-the-viaduct-to-the-state-of-the-art-tunnel-credit-paul-christian-gordonalamy-live-news-RAN30F.jpg)
Seattle, Washington, USA. 4th January, 2019. Southbound traffic passes the future onramp of the SR 99 Tunnel as the Washington State Department of Transportation prepares for the highway's permanent closure. A two-mile
![Washington's Highway 99: Images of America Series – Cowlitz County Historical Society © 2021. All rights reserved. Washington's Highway 99: Images of America Series – Cowlitz County Historical Society © 2021. All rights reserved.](https://i0.wp.com/cowlitzcountyhistory.org/wp-content/uploads/2021/05/Images-Hwy99.jpg?fit=750%2C1071&ssl=1)
Washington's Highway 99: Images of America Series – Cowlitz County Historical Society © 2021. All rights reserved.
![Travel Advisory: Plan ahead for lane reductions on State Route 99 Aurora Bridge overnight on June 4 and June 18 - SDOT Blog Travel Advisory: Plan ahead for lane reductions on State Route 99 Aurora Bridge overnight on June 4 and June 18 - SDOT Blog](https://sdotblog.seattle.gov/wp-content/uploads/sites/10/2021/06/25987074646_6466141350_o-scaled-e1622768540362.jpg)