Although we know a lot about returning to sports, exercise, and school after concussion, we know very little about returning to drive after a concussion. Our Driving after Concussion study needs the help of both healthy and recently concussed teen partners in our research to understand how concussion affects driving behaviors in teens.We are looking for healthy (have not had a concussion in the last year) and recently concussed teens who are 16.5-18 years old with a drivers license and their own smartphone.Our teen research partners may be asked to complete surveys about themselves and download smartphone applications that track symptoms associated with concussion and/or observe real-world driving behaviors. They may also be asked to come to CHOP's Driving Simulator Lab to complete a 3-hour session that includes surveys, clinical testing, and device testing along with a simulated driving assessment to observe driving behavior.All teens who participate will be compensated for their time and effort.