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The findings, said the authors, indicate that cannabis use resulted in diminished driving ability in simulators but when experienced marijuana users controlled their intake, impairment could not be inferred based on THC content of the cigarette, behavioral tolerance or THC blood concentrations.
The steady rise in the use of cannabis -; 18 states have legalized recreational use, 13 have decriminalized its use and 36 have medical cannabis laws -; has provoked myriad questions and concerns about public health implications, including how cannabis may affect the abilities, real and perceived, of drivers under the influence.