BY NORML A growing number of commercial truck drivers are being relieved of duty following positive drug screens for marijuana, according to federal data provided by the US Department of Transportation (DOT) and reported by the Kansas NBC affiliate KSNW. According to the news report, over 10,000 drivers tested positive for past cannabis exposure between January 1 and April … [Read more...] about Report: Spike in Marijuana Positives Fueling Truck Driver Shortage, Supply Chain Disruptions