Seattle’s Alaskan Way Viaduct was seismically unsafe, leading to one of the city’s most ambitious projects: the Bertha tunnel. Learn how the project was planned, the challenges faced, and why the ...

Washington State Department of Transportation will implement a toll as drivers make their way through the tunnel... The second phase of the Seattle Squeeze is winding down but that doesn’t mean ...

An curved arrow pointing right. When Seattle decided to put in a new highway tunnel beneath the city, a machine was specially built to dig the 2-mile long, 57-foot wide project. The 6,700 ton ...