Motor vehicle crashes cause more than 5,000 teen deaths per year, more than homicide, suicide, or any form of cancer. Automobile crashes are four times more likely to happen when a teenager is behind the wheel than any other segment of the population. At particular risk is the newly licensed teen. Studies have shown that crash risk is highest in the first six months of driving and drops after that. The PPC Human Factors program has a number of studies designed to address the developmental, social, technological, educational, and policy issues involved with teen driving.