Elon Musk is an engineer and entrepreneur. From early innovation and success in internet technology, as co-founder of PayPal, to space exploration, affordable electric vehicles and clean energy services, his ambition is to solve environmental, social and economic challenges.

His latest idea may be the most ambitious of all. The Hyperloop sounds like science fiction, but Musk envisions a high-speed transportation system that would be a “cross between a Concorde and a railgun and an air hockey table.” Travelling through pneumatic tubes, the system would permit travel from Los…