While many counties in Pennsylvania have begun relaxing marijuana laws and penalties for possession, when it comes to driving under the influence of cannabis, drivers should be aware that Pennsylvania will prosecute them for DUI of marijuana, and police are increasingly making weed related DUID arrests.
Driving while high is illegal in all states and Pennsylvania has perhaps the strictest laws in place which not only ban driving under the influence of weed, but also prohibit driving with any amount over 1 nanogram per milliliter of THC or its metabolites in their blood.