California’s longest highway tunnel is the Wawona Tunnel in Yosemite. It's a 4,233-foot passage blasted through granite in 1933 and still used today.

A roadway connecting Eureka and Crescent City is a lifeline for local residents, but its future is uncertain as rock slides ...

East River Tunnel’s Tube No. 1 is set to be taken out of service on May 9 for a week of prep work. Tube No. 1 will then be put back into service while Tube No. 2 is closed for similar work.

Elon Musk's Boring Company will build a privately funded high-speed tunnel, the Music City Loop, connecting Nashville ...