SaltyDawg
Well-Known Member
Seriously, those quotes say it all. That is straight from the horse's mouth- the NHTSA. They say they can't test for current impairment from marijuana. I don't know how many times those quotes need to be posted before people stop arguing that it can be done.They can do a blood test, but a blood test isn't currently able to detect current impairment. So yes they can test but it isn't useful. A blood test is a voluntary alternative to a breathalyzer for alcohol. Refer to the NHTSA.
https://www.nhtsa.gov/People/injury/research/job185drugs/cannabis.htm