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These state laws fall into three categories: (1) "zero tolerance" laws, which criminalizes driving with any amount of THC and/or its metabolites in the body; (2) "per se" laws, which criminalize driving with a certain level of THC in the body; (3) laws that focus on whether the driver was actually impaired or affected by THC; and (4 ...
After marijuana was legalized in the country, the number of drivers moderately injured in car accidents who were above the legal limit for THC more than doubled, from less than 4 percent of ...
THC, the main psychoactive component of cannabis, may only be detectable in saliva and oral fluid for 2–24 hours in most cases. [8] [9] The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10]
Crowder asked The Star if recreational marijuana legalization will include a legal limit for how much marijuana a person can consume and still drive, similar to the .08% blood alcohol limit ...
Timeline of Gallup polls in US on legalizing marijuana. [1]In the United States, cannabis is legal in 39 of 50 states for medical use and 24 states for recreational use. At the federal level, cannabis is classified as a Schedule I drug under the Controlled Substances Act, determined to have a high potential for abuse and no accepted medical use, prohibiting its use for any purpose. [2]
A 2022 study published in the Journal of Psychopharmacology found that participants given oral cannabis (the lab-grade alternative to an edible) showed low blood THC concentration at the height of ...
There are currently tools that law enforcement can use to detect cannabis, including oral fluid roadside screening devices which test saliva, but those only test the presence of drugs, not impairment.
An approach that appears to be working most successfully to reduce drug driving, based on the Australian experience of matching public health guidelines, such as no driving for approximately 3 hours after cannabis use, with targeted legal intervention (the saliva test drug detection threshold).