Maybe that's because it's also one of the world's steepest roads, chiseled into the mountain by local villagers. The Guoliang Tunnel is located in the Taihang Mountains in China's Henan Province ...

The mile-long East River Mountain Tunnel on Interstate 77 opened on Dec. 20, 1974, after five years, four months and 13 days of work. The total project cost – including design, right-of-way ...

The earliest tunnels in Southern California were built for shelter, or mining purposes, but as civilization encroached, the ...

(WSET) — On Dec. 20, 1974, around 500 people gathered in the freezing cold at I-77 East River Mountain Tunnel to celebrate the opening of the tunnel and a transportation milestone for the region.

The mile-long East River Mountain Tunnel on Interstate 77 opened on Dec. 20, 1974 after five years, four months and 13 days of work. The total project cost, including design, right-of-way acquisition, ...

More than four years after they started, construction crews in western China have bored through more than 22km of mountain rock to complete a milestone in the world’s longest expressway tunnel.

rehabilitate and upgrade the 19-mile-long Mountain Tunnel, a key component of the Hetch Hetchy Water System that takes water from Tuolumne County and sends it to San Francisco. The San Francisco ...

On December 20, 1974, approximately 500 people gathered in the frigid cold to celebrate the opening of I-77 East River Mountain tunnel, marking a transportation milestone for the region.