That fact is lost on 90% of Freepers. Of course more people smoke since it’s legal, but it doesn’t mean they were high when they were driving.
Don’t try to introduce science or freedom into the discussion. What will we do for arguments around here?
THC is fat soluable but the blood tests used to test for immediate use go negative after a day. Urine tests show positive longer but blood is used if impairment is suspected. You might test fat if you want to gauge if somebody has used the drug within the last several months but you use blood tests if you want to check levels in relation to suspected impairment say within a few hours of an accident.
So how do I know this...because I am an ICU RN and we get overdosed patients who often show elevated thc levels along with what ever drug(usually alcohol) they may have taken. By the next morning both etoh and thc levels have subsided if we check their blood levels again. The urine thc may still show positive...related to slow fat leaching though it wouldn’t be a good sign of continued impairment.
So blood tests taken immediately after an accident, if they show etoh or pot, may be used to show evidence of impairment, especially in light of other signs of impairment. If the blood is negative for pot but the urine shows pot after such an accident, then true, it would not be a good sign of impairment related to pot.
So don’t smoke pot and then drive hoping to deny that one is impaired by saying”oh I smoked some last week” that’s why my urine is positive. They will be checking your blood and if you crashed or were caught driving erratically, and the blood is positive for pot...you are screwed!