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Road Safety

The Effects of Drugs on Driving

Type of drug and effects on driving
Type of drug Effects on driving**
* Central nervous system

** References:

  • Drogues, santé et société, Volume 2, numéro 2, Cannabis : Pharmacologie du cannabis et synthèse des analyse des principaux comité d'experts, Ben Amar, Mohamed, 2004
  • NHTSA, Drugs and Human Performance Fact Sheets, 2004
  • SFA/ispa (2004). Alcool, drogues illégales, médicaments et circulation routière
CNS* depressant
  • Barbiturate
  • GHB
  • Drowsiness
  • Vertigo
  • Loss of peripheral vision
  • Increased reaction time
  • Loss of consciousness
  • Morphine
  • Heroin
  • Methadone
  • Decreased physical and mental skills required for driving
  • Slow driving
  • Loss of coordination
  • Loss of vehicle control
  • Increased reaction time
  • Drowsiness
  • Blurred vision
  • Solvent
  • Poppers
  • Decreased psychomotor and cognitive skills
  • Reduced visual perception
  • Inability to concentrate
  • Slowed movements
  • Increased reaction time
CNS* stimulant
  • Cocaine
  • Amphetamine
  • Speed
  • Ecstasy
  • Methamphetamine
  • Crystal Meth
  • High risk behaviour such as excessive speeding, cutting off other vehicles, aggressiveness
  • False sense of confidence
  • Drowsiness, depressive state, inattention (following state of euphoria)
  • Loss of coordination
  • Dilation of the pupils, which results in poor adaptation to bright light
CNS* disruptor
  • Cannabis
  • Hashish
  • Resin
  • Problems concentrating and focusing on the road
  • Risk of not being fully aware of the environment
  • Loss of coordination
  • Problem driving in a straight line
  • Problem maintaining a constant speed and evaluating distances
  • Increased reaction time, slowed reflexes and hesitant driving
  • Possible inability to manage the unexpected
  • LSD
  • Mescaline
  • Magic mushroom
  • Ketamine
  • Hallucinations
  • Coordination problems
  • Loss of sense of reality
  • Distorted vision
  • Significant reduction in psychomotor and cognitive skills
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Last Modification: 2011-10-25