Tesla focuses on Autopilot radar

Tesla Motors is working on modifications to its Autopilot system after it failed to stop for a tractor-trailer rig in a Florida crash that killed the driver of a Model S sedan.

CEO Elon Musk, in a Twitter post Thursday night, said Tesla is working on improvements to the radar system. Autopilot uses cameras, radar and computers to detect objects and automatically brake if a Tesla vehicle is about to hit something.

But in the May 7 crash that killed Joshua D. Brown, 40, of Canton, Ohio, cameras in his Tesla Model S failed to distinguish the white side of a turning tractor-trailer from a brightly lit sky, and the car didn’t automatically brake, the company has said. Signals from radar sensors also didn’t stop the car, and Brown didn’t take control, either.

Just after the crash was made public June 30, Musk gave an indication in a tweet that the radar was discounted in the Florida crash. His tweet, which since has been removed from Twitter, said that radar “tunes out” objects like an overhead road sign to avoid stopping the car for no reason. Experts say this means that the radar likely overlooked the tractor-trailer in the Florida crash.

Experts contacted by The Associated Press say it’s clear that Musk is focusing on the radar so his cars spot tractor-trailers in similar circumstances.

“It kind of strikes me that they’re figuring out how to solve that problem,” said Timothy Carone, a professor at the University of Notre Dame business school.

Radar can see through bright sunlight, rain, snow and other things that can block the sight of cameras.