Police are warning motorists that THC, the active ingredient in cannabis, can show up in a person’s system as much as three weeks after it was consumed. Any motorist that tests positive for cannabis runs the very real risk of losing their driving licence and paying a hefty fine.
"It is important that we warn people," north Zealand police spokesperson Henrik Suhr, told the Helsingør Dagblad. “Marijuana can still be tested for three weeks later, and we have a zero-tolerance policy. Drivers should not drive for three weeks after they smoke.”