He said according to the Centre for Accident Research and Road Safety Queensland, drug use increased the risk of crash involvement, and drivers with illicit drugs in their system were 10 times more likely to cause a crash. Drug use worsens your driving through cognitive impairment, which affects your judgment, memory and reaction time, he said. From a woman caught driving with her feet hanging out of the car to a driver found passed out with a cocktail of drugs in his system, here are 10 Coast drivers who were before the court last year for driving with meth in their system.