Accidents in the road environment are the commonest cause of death and serious injury in adolescence. Use of transport to and from school and during leisure activities is an important measure of road accident risk, and also provides useful data for assessing the amount of exercise taken by young people. ALSPAC has collected data on accidental injury throughout childhood, and specifically road use and travel to school questions were asked at 13 yrs. We propose to repeat these road use questions at 16 yrs, and add relevant questions about pre- driver attitudes.