Billionaire entrepreneur Elon Musk made a brief public appearance late on Tuesday to unveil the first tunnel completed by the underground transit venture he launched two years ago as an ambitious remedy to Los Angeles’ infamously heavy traffic. Free rides were part of the grand opening. In a 30-minute presentation carried by live webcast, Musk touted the newly finished 1.14-mile (1.83 km) tunnel segment as a breakthrough in low-cost, fast-digging technology being pioneered by his nascent tunnelling firm, the Boring Company.
