Anyone else see this yet? I was actually a bit surprised to have them recommend I vote 'no' while providing basically no information other than misleading traffic stats. Seems like they care more about having to pay more accident bills than improving a broken crime system. Meh, I'm genuinely considering leaving them because of this, it is not who I'd like to give my money to.
A DANGEROUS MIX (not my emphasis)
As states look at legalizing marijuana, AAA research suggests risks for traffic safety
This election year, voters in five states will decide whether to legalize recreational marijuana use. Among them are California with Proposition 64 and Maine with Question 1. Any states that do will join the four others where the drug is already legal for recreational use. 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, theres currently no easy way to test whether a driver is impaired by marijuana: Unlike alcohol, it cant be determined by breath or blood tests.
Marijuanas Effect on Driving
After alcohol, marijuana is the most common drug found in drivers who have been involved in traffic collisions.1 Marijuanas main psychoactive ingredient, active-THC, affects key parts of the brain, which can lead to:
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Difficulty paying attention
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Difficulty staying in traffic lane
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Slower reaction times
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Difficulty judging distances
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Slower decision-making
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Reduced peripheral vision
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Reduced coordination
Research results are mixed, but some studies have found that using marijuana as much as doubles a drivers risk of crashing.2 Furthermore, research shows that drivers killed in crashes who tested positive for marijuana were 1.29 to 6.6 times more likely to have caused the collision.3
A Worrying Trend in Washington State
In 2012, Washington voters approved Initiative 502 to legalize recreational marijuana use for adults. It took effect in December of that year. AAA examined drug tests and fatal crashes among Washington drivers between 2010 and 2014 and found the following:
Percentage of Washington drivers involved in fatal crashes who had recently used marijuana
8%
in 2013
17%
in 2014
After legalization, the proportion of fatal crashes that involved marijuana more than doubled. While the data analyzed for the study did not include enough information to determine which driver was at fault in a given crash, the trend is troubling because the proportion of fatal crashes involving marijuana in Washington had been relatively stable between 2010 and 2013.
Determining Impairment Isnt Easy
To combat marijuana-related crashes, some states have instituted per se legal blood limits on active-THC. Washington instituted one as part of Initiative 502, and four other states have them as well.
Per se limits make it a crime to drive with more than a certain amount of a drug in ones system. Drunk driving laws are a well-known example: In the U.S., driving with a blood alcohol concentration above 0.08 percent is automatically a crime. That's because decades of research have established a well-understood relationship between how much alcohol is in someone's blood and their risk of crashing.
Per se limits work for alcohol, because we can reliably predict crash risk from blood alcohol concentration. They dont work for marijuana, however, for several reasons:
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Theres no evidence that drivers definitively become impaired at a specific level of active-THC in the blood. Some individuals with high blood active-THC levels may not be significantly impaired, whereas others with low levels may still be severely affected.
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Theres currently no way to quickly determine active-THC levels. AAA found that it takes more than two hours on average to collect a blood sample, which means high active-THC levels may decline significantly before they can be measured.
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Marijuana is metabolized in the body differently from person to person. Frequent users can exhibit persistent blood active-THC long after active use, while occasional users may see their levels decline much more rapidly.
Per se legal limits on marijuana intoxication while driving are well-intentioned, but theyre not supported by scientific evidence. Instead, theyre likely to result in unsafe drivers being cleared and unimpaired drivers being convicted.
AAA opposes measures to legalize recreational marijuana use, and recommends a no vote on both Californias Proposition 64 and Maines Question 1. We have a genuine traffic safety concern related to the legalization of recreational marijuana use. It has taken generations to educate the public about drinking and driving and to strengthen the laws to reduce drunken driving. These measures would create new traffic safety issues and increase the problem of impaired driving.
The AAA Foundation for Traffic Safety's recent research raises many concerns about whether we are prepared to address the traffic safety risks Proposition 64 and Question 1 pose. More studies are needed before making such a far-reaching policy change that could have unintended, but tragic, consequences for traffic safety