Radar can see through bright sunlight, rain, snow and other things that can block the sight of cameras, so it makes sense that Tesla would try to emphasize radar more after the Florida crash, said Raj Rajkumar, a computer engineering professor at Carnegie Mellon University who leads its autonomous vehicle research. The cars’ software would have to be updated so it considers the radar data and determines if obstacles are in the way, Rajkumar said. Tesla has said that it constantly updates the Autopilot system as the company takes in data from cars that are on the road.