High on the highway — stoned-driving on the increase!
Science Daily, Date: October 26, 2018 Source: De Gruyter
Summary: Getting behind the wheel after cannabis use is on the rise in the US, and THC, not alcohol, is now the most commonly detected intoxicant in US drivers. Detecting levels of THC, however, is challenging and the methods used so far cannot accurately determine a person’s level of impairment.
It is unfathomable that states that have pushed for the legalization of recreational marijuana did so prior to developing an accurate roadside test for driver use of cannabis. As is typical of state and federal policy the “Cart” is often put before the horse”. States are reaping the financial tax benefits of legalizing this psychoactive substance while neglecting the impact it has on individuals physical, mental and emotional health not to mention those American’s who already struggle with addiction issues. It was rolled out in many states without proper education, health warnings and its use as a “gateway” drug. While marijuana use does not create the level of reckless driving alcohol consumption does it still impairs drivers reaction times and driving focus.
The article “Driving While Stoned: Issues and Policy Options” by Mark A.R. Kleiman, Tyler Jones, Celeste J. Miller, and Ross Halperin, published in De Gruyter’s Journal of Drug Policy Analysis, looks at current issues associated with cannabis intoxication when driving and the options available in testing for THC levels.
The study suggests that, due to the recent legalization of the production and sale of cannabis in some US States, the number of people driving under the influence of cannabis is likely to rise, which is unsettling since there is a widespread belief among marijuana users that THC does not have an effect on driving. Americans now spend an estimated 15 billion hours under the influence of cannabis per year, with no sign of consumption slowing down soon.
Unlike breath alcohol detection tests, which are cheap, reliable and can be easily administered at the roadside, a breath test for cannabis remains to be developed.
Oral-fluid testing can demonstrate recent use but not the level of impairment and thus a blood test must be carried out by health professionals at a medical facility. A further challenge is that blood THC levels drop very sharply even after minutes. A blood test is also a poor indicator of how recently the drug was used or the extent of impairment, and other tests are also not completely accurate.
Research on the risk of driving under the influence of cannabis is still preliminary and subject to fierce debate. However, a few facts are certain: stoned-driving adds to accident risk, especially in combination with alcohol and other drugs. Also, while it is certain that the risk of driving under the influence of cannabis alone is much lower than under the influence of high levels of alcohol, it is difficult to determine levels of impairment after cannabis use.