DUII is already to the discretion of the officer, if they think you are too drunk to drive, you get arrested. Same thing for pot, if they think you’re too stoned to drive, you’ll get arrested and blood/urine tested. It’s already up to the discretion of the officer, years ago I’ve been given sobriety tests and let go, when they probably shouldn’t have.
“DUII is already to the discretion of the officer, if they think you are too drunk to drive, you get arrested. Same thing for pot, if they think you’re too stoned to drive, you’ll get arrested and blood/urine tested.”
Also, the blood/urine tests can detect pot in the body from the day before, or whathaveyou. How will you make charges stick in a court?
So by legalizing pot, you’ll encourage millions more to toke and drive, with little chance of upholding dubious tests for specific levels of THC in the bloodstream, as the testing is not as precise as those for alcohol in the bloodstream. One could always claim it had been smoked a day or two earlier.