To examine the impact of enforcement of age-restricted tobacco sales on adolescent tobacco purchasing and smoking, we compared the Central Coast intervention area to the rest of New South Wales (NSW) and Australia. We collected data on students in school years 7-12 from triennial health surveys at baseline in 1993 through 2002. Attempts by minors to purchase tobacco in the intervention area declined by 73.6 per cent between 1993 and 2002. Between 1993 and 1996 the prevalence of smoking declined in the Central Coast intervention area, while remaining unchanged in NSW as a whole and nationally (P<0.0001). Between 1993 and 2002, the prevalence of current smoking in the intervention area was reduced by half. Effective enforcement of an age-restricted tobacco sales law was accompanied by a substantial reduction in attempted purchases of tobacco and of smoking by youth. The long-term follow-up in this study allows us to observe that the impact of the intervention was not only sustained but also increased with time.

Cannabis and driving is an emerging injury‐prevention concern. The incidence of driving while affected by cannabis is rising in parallel with increased cannabis use in the community. Younger drivers are at particular risk. Improvements in research methodology, technology and laboratory testing methods have occurred in the last 10 years. These cast doubt on earlier results and conclusions. Studies now show that cannabis has a significant impairing effect on driving when used alone and that this effect is exaggerated when combined with alcohol. Of particular concern is the presence of cannabis as the sole psychoactive drug in an increasing number of road fatalities and the lack of any structural response to this problem. A review of testing methods, laboratory and real driving studies, and recent epidemiological studies is presented. Suggestions for methods of further data collection and future public policy are made.

Alcohol sales to young customers without checking ID are common, widespread and seemingly resistant to nonpunitive interventions. The NSW Liquor Act could be modified to allow compliance testing and much more practical enforcement. While Central Coast bottle shops have a better record than other Australian areas showing some improvements with our nonpunitive industry education interventions, the results need to improve substantially to stifle primary supply.

Cannabis and driving is an emerging injury-prevention concern. The incidence of driving while affected by cannabis is rising in parallel with increased cannabis use in the community. Younger drivers are at particular risk. Improvements in research methodology, technology and laboratory testing methods have occurred in the last 10 years. These cast doubt on earlier results and conclusions. Studies now show that cannabis has a significant impairing effect on driving when used alone and that this effect is exaggerated when combined with alcohol. Of particular concern is the presence of cannabis as the sole psychoactive drug in an increasing number of road fatalities and the lack of any structural response to this problem. A review of testing methods, laboratory and real driving studies, and recent epidemiological studies is presented. Suggestions for methods of further data collection and future public policy are made.