How long does weed stay in your system? There’s one particular time frame that always gets mentioned:
Browsing: blood test
Drivers who test positive for the presence of THC in blood are no more likely to be involved in motor vehicle crashes than are drug-free drivers.
The B.C. Civil Liberties Association has raised serious concerns on behalf of 3,000 injured B.C. drivers whose blood will be tested for marijuana without their knowledge for a $1-million study on drugs and driving.