"This risk is exacerbated by the fact that there is currently no proven, widely accepted standard to determine marijuana impairment at the roadside or before a driver begins operating a vehicle, ...

Almost 56% of commercial driver medical exams showed medical history errors by either drivers or certified medical examiners, according to a recent study by the American Journal of Industrial Medicine ...

Update: On November 10, 2025, the D.C. Court of Appeals ordered the non-domiciled CDL Interim Final Rule paused for further deliberation of the case discussed in this story. Find more about that pause ...