Why are new restrictions being put on teen drivers?

Because the overwhelming majority of traffic fatalities are caused by drivers under 24. Restrictions are an attempt to lower the death rates. Unfortunately, at that age, everyone thinks "It won't happen to me." Then it does. Because most teen drivers are idiots. Not to be mean, but they have no idea of the consequences of what they are doing and they get themselves, their friends and other people killed. They are easily distracted, trying to show off to their friends and the opposite sex and don't have the experience necessary to be a good driver. I watched a teen driver in front of me just this afternoon and observed at least three ticketable offenses. And the licensed driver with them didn't even notice.