The problem is that it’s not just impaired drivers that are being arrested, it’s people who simply have a medical card. If an officer spots your medical card, they know you’ll test positive for cannabis in your system wether you recently used or not, so they can be assured of a dui conviction. It can be weeks since your last use and you’ll still be guilty of a dui.

John Fetterman talked quite a bit about this problem, and urged the pa legislature to fix this problem, but nothing has been done so far.