Things are being done, but the most effective one would be to reduce speeds and number of cars. Since USA is big distances, 1 has strong opposition, and 2 even

Things are being done, but the most effective one would be to reduce speeds and number of cars. Since USA is big distances, 1 has strong opposition, and 2 even stronger. They could also make the drivers license short time, like 2 years requiring a refresh exam, but that'd be a real pain in the rear. You could mandate built in breathalyzers, but they would routinly be failing or bypassed... Though it's a good attempt. Ultimately getting rid of reducing number of unsafe human drivers would be good.