Transbay Tube
The Transbay Tube is an underwater rail tunnel which carries Bay Area Rapid Transit's four transbay lines under San Francisco Bay between the cities of San Francisco and Oakland in California. The tub...
Transbay Tube - Wikipedia
East River Mountain Tunnel
The East River Mountain Tunnel is a 5,412-foot (1,650 m) vehicular tunnel that carries Interstate 77 (I-77) and U.S. Route 52 (US 52) through East River Mountain between the communities of B...
East River Mountain Tunnel - Wikipedia