Adolescents with externalizing problems tend to come from families where parental monitoring and control is lacking (i.e. under controlled). Externalizing problems are more common among males than females. Risk behaviour refers to behaviours that involve the risk of negative outcomes (e.g. substance use). Problem behaviour refers to behaviour that is viewed as a source of problems (e.g. unprotected sex). People with externalizing problems often do not experience distress. Externalizing behaviours may be a manifestation of problems with family, friends or school but this need not be the case. It is often not motivated by unhappiness or psychopathology but by desire for excitement and intense experiences. Driving is the number one source of death in adolescence and emerging adulthood in developed countries. Accidents are especially high in the first few months of driving but fall after having a license for more than a year. This means that inexperience plays a role in the mortality due to driving. However, younger drivers are also more likely to engage in risky driving. This includes driving at excessive speeds (1), following other vehicles too closely (2), violate traffic signs and signals (3), take more risks in lane changing and passing other vehicles (4), allowing too little time to merge (5) and failing to yield to pedestrians (6). They are also more likely to drive under the influence. Next, they are less likely to wear seatbelts. Parental involvement and monitoring of adolescents’ driving behaviour is important in the early months of driving. Friends’ influence promotes risky driving. Personality characteristics such as sensation seeking and aggressiveness promote risky driving. The optimistic bias (i.e. the belief that one is less likely than others to get into a car crash) is stronger in younger drivers.Driver education programmes is not very effective in reducing risky driving. Graduated driver licensing (GDL) refers to a programme...