If you have been hit by a marijuana-impaired driver, you have been personally affected by a powerful trend. Now that the majority of states have legalized marijuana for some purposes, you might expect that the rate of impaired driving would be higher. You would be right to be concerned.
Not necessarily, according to a recent study. Their ability to out-perform humans in terms of safety will depend not only on the accuracy and reliability of their sensors but also on how they weigh the importance of safety.