Prevalence of alcohol and other psychoactive substances in motor vehicle drivers in Spain, 2018: Cross-sectional dataset analysis with studies from 2008 and 2013

•There were few cases of positives for drugs/alcohol in 2018 and 2013 than in 2008.•Driving after consumption of cannabis is more frequent than after alcohol.•Multiple drug use (without alcohol) increased from 2008 to 2018.•Roadside drug testing implementation contributed to the decrease in drugged driving.•Presence of substances continues to be high among Spanish drivers.