Cannabis drivers 'twice as likely to cause car crash'
Friday, February 10, 2012
Drivers who use cannabis within three hours of driving are twice as likely to cause a collision as those not under the influence of drugs or alcohol, says a Canadian study. This is because cannabis impairs brain and motor functions needed for safe driving, the researchers suggest. The study, Acute cannabis consumption and motor vehicle collision risk: systematic review of observational studies and meta-analysis, reviewed nine studies of 50,000 people worldwide who had been in serious or fatal crashes.