Early introduction of a 0.05% blood alcohol limit for all drivers has been highly successful in reducing alcohol crashes and related injuries. At the time of introduction, 0.05% was found to be the level at which the risk of crash doubled. Given that inexperienced young drivers have an even greater level of risk, a “zero tolerance” approach has since been adopted in restrictions for Learners and Provisional drivers. All Australian States and Territories currently have a zero (0.00 g/100ml) blood alcohol concentration (BAC) limit for these drivers with the exception of the Australian Capital Territory, where a 0.02% BAC limit applies.