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As more states legalize marijuana, the search for better methods of proving and preventing drug impairment on the road accelerates.
Researchers investigated how marijuana affects skills required for safe driving and found that biofluid levels of THC did not correlate with field sobriety test performance or marijuana intoxication, regardless of how the cannabis was ingested.
A new age of algorithms taking the wheel en masse is still some years away, but law enforcement must prepare now, an NIJ-sponsored group concludes.
