Musk posted the video on Instagram showing an electric sled traveling through a tunnel that is meant to carry cars at 125 mph. The billionaire entrepreneur said on Instagram that the new method of transportation "would mean Westwood to LAX in 5 mins" (approximately 10 miles).
The test is a part of The Boring Company, Musk's project that hopes to build a system of tunnels under Los Angeles. The company uses giant boring machines to make the tunnels.