Tech entrepreneur Elon Musk is set to unveil an underground transportation tunnel on Tuesday that could move people faster than subways. Musk also plans to show off the autonomous cars that will carry ...

Billionaire Elon Musk says he's almost completed a tunnel under a Los Angeles suburb to test a novel transportation system that would scoot commuters underground on electric sleds called skates. Musk ...

Gov. Bill Lee, whose office has been a driving force behind Elon Musk’s Music City Loop project in Nashville, praised progress so far on the tunnel from Nashville International Airport to downtown.