THC (delta-9 tetrahydrocannabinol) is the primary psychoactive ingredient in marijuana that causes driving impairment. Legislators have long sought a per se level of THC in a driver’s blood that is equivalent to alcohol per se levels, .08 BAC in the United States and .05 BAC in most other countries.
“The Futile Search for the “Right THC per se Level” describes why there is no scientifically valid THC per se level. It is not because we … READ MORE