BISMARCK, ND (KXNET) — The North Dakota Department of Transportation (NDDOT) and Vision Zero are reminding drivers that impairment is impairment ahead of 4/20. According to results from the North Dakota roadside Oral Fluid Pilot Project study, marijuana (THC) was present in more than half of samp les collected from January 2022 through July 2023. The data [...] ...read more read less