How drugs affect your ability to drive
CANNABIS -- Interferes with your ability or willingness to pay attention and makes you increasingly distracted. It's extremely dangerous to drive after smoking cannabis. Drivers are three times more likely to be involved in a crash.
COCAINE -- Brings exaggerated feelings of confidence, strength and intelligence. Judgement is severely impaired. Drivers are likely to be hyperactive, unable to judge time and distance accurately.
ECSTASY -- Exaggerates all emotions. Hearing a sound may lead drivers to believe they can see something that isn't there. Balance and judgement of time and distance affected.
HEROIN -- Depresses reflexes, and co-ordination will be poor. Drivers on heroin will not be able to see properly, concentrate or react quickly to events on the road.