In a study analyzed by NHTSA, teen drivers were two-and-a-half times more likely to engage in one or more potentially risky behaviors when driving with one teenage peer compared to when driving alone. According to the same study analyzed by NHTSA, the likelihood of teen drivers engaging in one or more risky behavior when traveling with multiple passengers increased to three times. In fact, research shows that the risk of a fatal crash goes up in direct relation to the number of teenagers in the car.
Again, the law is not enough. As a parent, you need to establish and enforce ground rules: No extra passengers in the car.
No extra passengers in the car.