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Title
Cannabis / Marijuana ( Δ 9 -Tetrahydrocannabinol, THC)
02/16/2000

Decreased car handling performance, increased reaction times, impaired time and distance estimation, inability to maintain headway, lateral travel, subjective sleepiness, motor incoordination, and impaired sustained vigilance have all been reported. Some drivers may actually be able to improve performance for brief periods by overcompensating for self-perceived impairment. The greater the demands placed on the driver, however, the more critical the likely impairment. Marijuana may particularly impair monotonous and prolonged driving. Decision times to evaluate situations and determine appropriate responses increase. Mixing alcohol and marijuana may dramatically produce effects greater than either drug on its own.


NHTSA, THC, Pharmacokinetics, driving
THE EFFECT OF CANNABIS COMPARED WITH ALCOHOL ON DRIVING
09/17/2009

Cannabis and alcohol acutely impair several driving-related skills in a dose-related fashion, but the effects of cannabis vary more between individuals than they do with alcohol because of tolerance, differences in smoking technique, and different absorptions of Δ9-tetrahydrocannabinol (THC), the active ingredient in marijuana. 


alcohol, driving
AAA Fatal Crash
02/02/2015
AAA, driving, Fatalities
What level of THC in blood causes driving impairment?
04/10/2015

Let us provide a rational answer to a nonsensical question. It is a nonsensical question because blood is never impaired by THC. Never. Alcohol doesn’t impair blood either. These drugs only impair the brain, not the blood.


driving, impaired, drug testing
Study analyzes how much pot impairs drivers
06/23/2015

"But what we've found out is that as alcohol-impaired driving is going down, drug-impaired driving is going up." 

  • THC moves more rapidly than alcohol out of the bloodstream and into the body, making it harder to detect accurately with a blood test.

impaired, driving, car crashes, TODAY, Studies
Florida Highway Safety & Motor Vehicle Report 2014
07/31/2015
Florida, Report, driving
The Futile Search for the “Right” THC per se Level
08/13/2015

THC is a large, fat-soluble molecule whose concentration in the blood rapidly drops as it is sequestered into the body’s fat stores, including the brain.  Immediately after smoking a joint, the THC level will be very high in the blood and very low in the brain.  The THC level in the brain climbs rapidly at the same time that as it is declining in the blood.  At some point, the concentrations cross, and the concentration continues to rise in the brain while it is still declining in the blood, since the brain acts like a sponge, soaking up the partially insoluble THC from the blood.  


alcohol, driving, impaired
Washington Traffic Safety Commission
09/24/2015

Olympia, WA – Newly released data from the Washington Traffic Safety Commission (WTSC) shows that marijuana is increasing as a factor in deadly crashes. The number of drivers involved in deadly crashes who tested positive for marijuana increased 48 percent from 2013 to 2014. 
“This study is a step towards answering the myriad of questions we have about the impact of legalized marijuana on driving.


Washington, car crashes, driving
More Washington Drivers Use Pot And Drive; Effect On Safety Disputed
12/18/2015

Analysis of Impaired Drivers - Three years ago, about 19 percent of the samples contained THC, the key ingredient in pot. This year, that percentage is up to 33 percent.  


Washington, driving, Fatalities, car crashes
Testing Drivers for Evidence of Marijuana Use is Difficult
02/11/2016

“It’s really difficult to document drugged driving in a relevant way, [because of] the simple fact that THC is fat soluble,” said Margaret Haney, a neurobiologist at Columbia University. “That makes it absorbed in a very different way and much more difficult to relate behavior to, say, [blood] levels of THC or develop a breathalyzer.”


driving, drugged driving, drug testing
AAA Marijuana, Alcohol and Driving
03/01/2016
AAA, driving, alcohol
Impacts of Alcohol and Marijuana on Driving
04/01/2016
AAA, alcohol, driving, Impairment
Marijuana and Driving
04/01/2016
driving, Infographics
Impaired Driving And Cannabis
05/10/2016

Fatal crashes involving drivers who recently used marijuana doubled in Washington after the state legalized the drug. Washington was one of the first two states to legalize the recreational use of marijuana, and these findings serve as an eye-opening case study for what other states may experience with road safety after legalizing the drug. 


AAA, Washington, driving, car crashes, Colorado, Impairment
Stoned Drivers Are Killing More and More Innocent Victims
05/14/2016

Fatal driving accidents have risen 122 percent between 2010 and 2014, according to the Washington State Traffic Safety Commission.

The science is clear and unambiguous—pot is a dangerous substance. It is not like alcohol at all. There is a reason it is classified as a Schedule I controlled dangerous substance, right along with heroin, LSD, and ecstasy. The American Medical Association, the American Lung Association, and other reputable doctors and scientists all reject legalization.


drugged driving, driving, car crashes, Washington, Colorado, Fatalities
"SWAP" TAC Drug Drive Ad
05/21/2016

If you drive on drugs you are out of your mind.


driving, drugged driving, youtube, Fatalities
The AAA Position: Marijuana’s Effect on Driving
10/07/2016

The AAA Foundation for Traffic Safety analyzed cannabis use by drivers in one of those states, Washington, and found that the proportion of drivers involved in fatal crashes who had recently used marijuana more than doubled after Washington legalized the drug for recreational use. In addition, there’s currently no easy way to test whether a driver is impaired by marijuana: Unlike alcohol, it can’t be determined by breath or blood tests.


AAA, postition statement, statement, driving, drugged driving, Impairment, car crashes, Fatalities, drug testing
The Clinical Conundrum of Medical Marijuana
01/06/2017

Detailed Information
. Patients freely share their “medicine” with family and friends, and parents are self-diagnosing, and subsequently dosing their children with high-concentration marijuana products for conditions that may simply not exist (attention-deficit/hyperactivity disorder, anxiety, etc.); or allow their medical cards to expire and continue to grow their own.
The use of marijuana for medical conditions, including pain, needs robust studies, and subsequent products need more regulation and consistency for public consumption. Colorado is an example of the societal effect across a wide spectrum of arenas that comes with rampant cannabis use, particularly in youth use and impaired driving fatalities. The problems Colorado is seeing completely transcend “responsible use” or “marijuana as medicine.” 

 


Potency, Studies, driving, Finn, MD, 2017 Legislation
Marijuana and Driving
01/15/2017
2017 Legislation, driving, CDC
Learn more about the risks marijuana use poses to your health.
01/29/2017

Here are just a few of the health effects you may want to know:

  • Marijuana use directly affects the brain—specifically the parts of the brain responsible for memory, learning, and attention.
  • The compounds in marijuana can affect the circulatory system and may increase the risk of heart attacks and strokes.
  • Smoking marijuana can lead to a greater risk of bronchitis, cough, and phlegm production.
  • Marijuana users are significantly more likely than nonusers to develop chronic mental disorders, including schizophrenia. Schizophrenia is a type of mental illness where people might see or hear things that aren't really there (hallucinations).
  • Eating foods or drinking beverages that contain marijuana have some different risks than smoking marijuana, including a greater risk of poisoning.
  • About 1 in 10 marijuana users will become addicted. For people who begin using before the age of 18, that number rises to 1 in 6.
  • Some research shows that using marijuana while you are pregnant[288 KB] can cause health problems in newborns—including low birth weight and developmental problems.
  • Marijuana use can slow your reaction time and ability to make decisions when driving[271 KB].

 


Brain, heart, lungs, mental health, poisoning, Pregnancy, driving, CDC, stroke, Side-Effects
Cannabis use and driving-related performance
07/01/2018

We found that among young recreational cannabis users, a regular dose of cannabis had no effect on simple and learned tasks, but its use led to significant impairments on complex and novel driving-related tasks, as well as perceived driving ability and safety, for up to 5 hours after use. The present finding that the first 5 hours after cannabis use affected driving-related performance substantiates the recommendations of Canada’s Lower-Risk Cannabis Use Guidelines, which recommend waiting 6 hours after cannabis use before driving.30
 


Canada, Research, study, driving, youth
New AAA Foundation research shows an estimated 14.8 million Americans report driving within one hour after using marijuana in the past 30 days
06/23/2019

An alarming finding shows that an estimated 14.8 million drivers report getting behind the wheel within one hour after using marijuana in the past 30 days. The impairing effects of marijuana are usually experienced within the first one to four hours after using the drug.1 And marijuana users who drive high are up to twice as likely to be involved in a crash.2


AAA, driving, driving drugged
Car insurance premiums could rise as a result of legalized marijuana, experts say
06/24/2019

In the four states that were among the first to legalize pot – Colorado, Nevada, Oregon and Washington – crashes were up by as much as 6% compared with neighboring states without legalized recreational weed, according to analysis of collision loss data from January 2012 through October 2017 by the Insurance Institute for Highway Safety and an October 2018 report done by the Highway Loss Data Institute.


insurance, driving
What Do I Need to Know about Marijuana?
09/25/2019

What Do I Need to Know about Marijuana?   Podcasts   Answers all the myths with science and facts.  Is it safe to drive using marijuana?  If it is a medicine, how can it hurt me?  What does marijuana use do to my brain? ....


Podcasts, Brain, driving, Effects
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