Elon Musk says he's planning to offer the public free rides through a tunnel he bored under part of Los Angeles to test a new type of transportation system.
In a series of tweets Sunday, Musk said the tunnel is almost complete and there will be an opening event on the night of Dec. 10 and free rides for the public the next day.
The tunnel runs about 2 miles under the streets of Hawthorne, where Musk's SpaceX headquarters is located.
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Musk has described a system in which vehicles or people pods are moved on electrically powered platforms called skates at speeds up to 155 mph.
Musk wants to build a tunnel across western Los Angeles and another between a Metro subway line and Dodger Stadium.