Drink and drug driving: what's the skipper up to?

Objective: Since the introduction of random breath testing (RBT) in Australia there has been a significant reduction in drink driving, as measured by alcohol‐related crashes. In contrast, the prevalence of drug‐related road fatalities is on the increase. One strategy that targets drink‐and/or drug‐driving is the promotion of a designated driver or ‘skipper’. This paper determines to what extent the ‘skipper’ is driving alcohol or drug‐free.