Elevated highway
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An elevated highway is a controlled-access highway that is raised above grade for its entire length. Elevation is usually constructed as viaducts, typically a long pier bridge. Technically, the entire
Yan'an Elevated Road in Shanghai, China
Interstate 81 in Syracuse, New York State
Route 5 Shuto Expressway in Tokyo, Japan
State Route 99 tunnel
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The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States. The 2-mile, double-decker tunnel carri
A visualization of the tunnel
July 2015
September 2018
The completed south portal is seen behind Lumen Field in this aerial view.