Asked at a community meeting if the state is considering replacing the Tobin Bridge with a tunnel, the project manager ...

On social media, San Franciscans can't stop talking about imaginary tunnels for cars, whales and trips to their favorite taquerias.

Falling concrete can be extremely dangerous. In 2006, Milena Del Valle, 38, of Boston, was killed when ceiling panels in a Big Dig tunnel fell and crushed her car. The Massachusetts State Police ...

Learn more Tunnel Score: 100 The tunnel shield supports the soggy soil so it won't cave in on you as you dig. Here's how it works: The shield, which looks like a huge tin can, cuts through the ...