Tesla’s Elon Musk says Hyperloop rail design is coming soon

Never one to think small, tech mogul Elon Musk — founder of Tesla Motors and Space X — says he’s working on a “fifth mode” of transportation that can zip you from Los Angeles to San Francisco in half an hour.
“Will publish Hyperloop alpha design by Aug 12. Critical feedback for improvements would be much appreciated,” Musk said in a tweet, which he prefers to the news release or the interview. A Tesla spokeswoman said Musk would have no further comment.
The Hyperloop, Musk has said previously and cryptically, would resemble a “cross between a Concorde and a railgun and an air hockey table.”  He’s also said it would be immune to both crashes and inclement weather conditions, suggesting it would be fully enclosed.