A task force on driving under the influence of cannabis in the state of California has concluded that there should be no set limit of THC or THC metabolites in the bloodstream. Such limits are not backed by scientific research and should be scrapped, concluded the panel of experts led by the California Highway Patrol.
Law enforcement “should use the best available, scientifically validated, roadside presumptive drug testing technology for possible drug-impaired driving investigations,” the task force wrote, but did not specify what those tools are.
California does not currently have a legal bloodstream concentration limit for THC like it does for alcohol, though a recent survey found that may come as a surprise to almost half of all respondents.
Currently, officers use field sobriety tests to determine cannabis impairment, although they could use better training, the task force suggested.
Some other states, like Colorado, do have per se limits on levels of THC metabolites in the bloodstream.
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