LOS ANGELES (AP) - Imagine stepping into a car-sized capsule in downtown Los Angeles and, 30 minutes later, emerging in San Francisco.
Billionaire entrepreneur Elon Musk on Monday unveiled a concept for a transport system he says would make the nearly 400-mile trip in half the time it takes an airplane.
If it's ever built.
The "Hyperloop" system would use a large tube. Inside, capsules would float on air, traveling at over 700 miles per hour.
The air would be sucked by a powerful fan at the front and expelled at the rear.
Musk has said he's too busy to oversee the Hyperloop. Instead, he hopes others will take it on.
(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)