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11. Driving Under the Influence

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211
Marijuana's Affect on Driving

Marijuana

Marijuana affects many skills required for safe driving: alertness, the ability to concentrate, coordination, and reaction time. These effects can last up to 24 hours after smoking marijuana. Marijuana use can make it difficult to judge distances and react to signals and sounds on the road.

There are data showing that marijuana can play a role in crashes. When users combine marijuana with alcohol, as they often do, the hazards of driving can be more severe than with either drug alone.

A study of patients in a shock-trauma unit who had been in traffic accidents revealed that 15 percent of those who had been driving a car or motorcycle had been smoking marijuana, and another 17 percent had both THC and alcohol in their blood.

In one study conducted in Memphis, TN, researchers found that, of 150 reckless drivers who were tested for drugs at the arrest scene, 33 percent tested positive for marijuana, and 12 percent tested positive for both marijuana and cocaine.

Data also show that while smoking marijuana, people show the same lack of coordination on standard "drunk driver" tests as do people who have had too much to drink .


Lesson Summary


  

Lesson 11 Quiz


You will now answer 5 questions to test what you learned during this lesson. You must answer all questions correctly to receive completion credit for this lesson. You may answer the questions as many times as necessary to get them right.

You should review the lesson material if you don't do well on the quiz.

  1. Designated Drivers:


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  2. If you are under 21, the zero tolerance policy for drinking and driving will revoke your license even if your BAC is as low as what percent?


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  3. After completing all 11 lessons and then passing the final test, your certificate of completion of driver education will be:


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  4. BAC stands for:


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  5. Alcohol is a:


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