By David Shepardson WASHINGTON (Reuters) - The U.S. government on Monday finalized long-delayed rules that will require "quiet cars" like electric vehicles and hybrids to emit alert sounds when they are moving at speeds of up to 18.6 miles per hour (30 km per hour) to help prevent injuries among pedestrians, cyclists and the blind. The rules, which were required by Congress, will require automakers like Tesla Motors Inc , Nissan Motor Co and Toyota Motor Corp to add the sounds to all vehicles by September 2019. The U.S. Transportation Department said it expects the rules would prevent 2,400 injuries a year by 2020 and require the addition of alert sounds to about 530,000 2020 model vehicles.
