Drug-impaired driving incidents were less likely to be cleared by charge than alcohol-impaired driving incidents.Compared with alcohol-impaired driving, drug-impaired driving varies much less by day and time of day. This is also the time period which has shown the largest declines in recent years. Almost half of impaired driving incidents reported by police in 2014 occurred between 11:00 p.m.However, the largest declines in rates since 2009 were also observed among young drivers. Young adults aged 20 to 24 years had the highest impaired driving rates.However, the proportion who were females has substantially increased over the past 30 years, from 8% in 1986 to 20% in 2015. The majority of persons charged with impaired driving in 2015 were male.Among the CMAs, the St. John’s CMA recorded both the highest alcohol-impaired driving rate and the highest drug-impaired driving rate.While census metropolitan areas (CMA) together account for about 70% of the population, half of all impaired driving incidents in 2015 took place in these areas.The highest drug-impaired driving rates in 2015 were observed in the three Territories and in the Atlantic provinces, while Ontario posted the lowest rate by far.The lowest rates were in Ontario, Quebec and Manitoba. The highest impaired driving rates were reported in the Northwest Territories, Yukon and Saskatchewan.Almost 3,000 drug-impaired driving incidents were reported, representing 4% of all impaired driving incidents, double the proportion in 2009, when data on drug-impaired driving became available.This is the lowest rate since data on impaired driving were first collected in 1986 (-65%) and 4% lower than in 2014. In 2015, police reported 72,039 impaired driving incidents, representing a rate of 201 incidents per 100,000 population.