Hyperloop One 'proves' it's cheaper than high-speed rail

https://www.engadget.com/2016/07/06/hyperloop-one-proves-its-cheaper-than-high-speed-rail/

Suffice to say, the headline stat is this: the per-mile cost of building this loop is pegged at around $40 million per kilometer. By comparison, the World Bank estimates that California's slower, less efficient High Speed rail project will cost $56 million per km.''