The Boring Company on Friday released dashcam footage of two Teslas racing — one using the roads, and the other using a Boring Company tunnel.

The car using the tunnel won the race by more than three minutes, after the car above ground got stuck in traffic.

The video revealed that the Boring Company had done away with a key element of the tunnel's original design: rails that guide the car.

Boring Company CEO Elon Musk has said he created the company to solve the "soul-destroying" traffic around Los Angeles.

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Shortly after news broke that Elon Musk's Boring Company landed its first tunnel-building project in Las Vegas, it released a video of two Teslas racing in its tunnel near Los Angeles — one using the roads, and the other using a Boring Company tunnel.

The Tesla in the tunnel took one minute and 36 seconds to get to the destination, reaching 127 mph, the video, posted early Friday, showed. The car using the roads arrived in four minutes and 45 seconds, after getting stuck at a red light.

You can watch the race here:

—The Boring Company (@boringcompany) May 24, 2019

The video revealed that a key element of the design of the Boring Company's 1.14-mile test tunnel in Hawthorne had changed. This demonstration of the tunnel differed from earlier ones in which cars were whisked along on rails.

Replying to a tweet asking whether there were no more rails and the car was driving on Autopilot, Tesla's semi-autonomous driver-assist system, Musk said, "Pretty much."

When asked why the original rail system had been abandoned, Musk added, "This is simple and just works."

Read more: See inside the Boring Company's first 1.14-mile tunnel, which Elon Musk hopes can solve LA's "soul-destroying" traffic

The CEO has said he hopes the tunnels let people escape LA's "soul-destroying" traffic. Musk showed off the inside of the tunnel in December by taking the CBS anchor Gayle King for a ride at a much more sedate 20 mph.

Musk said on Wednesday that the Boring Company's first commercial project — building a mile-long tunnel connecting two ends of the Las Vegas Convention Center — would be completed by the end of this year.