Elon Musk may not have much interest in making his futuristic "Hyperloop" transportation system a reality, but there are plenty of others who do.
Since Musk first announced the concept, multiple entities have stepped forward to build functional versions of the Hyperloop--which uses capsules suspended in tubes to transport passengers at high speeds.
In fact, there are now not one, but three Hyperloop test tracks in the planning stages.
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The latest proposal is for a one-mile test track to be built by global infrastructure firm AECOM at the Los Angeles headquarters of Musk's SpaceX company, according to Autoblog Green.
SpaceX headquarters is located in a fairly built-up area in Hawthorne, California, near Los Angeles International Airport.
The site likely doesn't encompass enough space for a mile-long track, so AECOM may have to build across streets, and through adjacent properties.
Concept drawings for Elon Musk’s 800-mph Hyperloop
The prototypes will be about half the size of the ones in Musk's original proposal, and won't carry people.
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That announcement comes hot on the heels of startup Hyperloop Transportation Technologies' (HTT) plan to break ground on a 5-mile track in California's Quay Valley later this year.
HTT plans to use this short Hyperloop to transport residents of an area development, and expects construction to cost $100 to $170 million, spokesman Ben Cooke said recently.
Rendering of Hyperloop track by Hyperloop Transportation Technologies (HTT)
Finally, another startup called Hyperloop Technologies Inc. plans to build a test track of its own in North Las Vegas, Nevada.
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The initial track will reportedly be used to test ways to propel capsules, while a second track will be built to test the complete system.
Coincidentally, North Las Vegas is also where electric-car startup Faraday Future--a company some analysts view as a potential rival to Musk's Tesla Motors--will build a $1 billion factory.