​​Commercial motor vehicle drivers must remain alert and vigilant to changing roadway conditions and traffic hazards. Obstructive sleep apnea is a medical condition that, unless identified and appropriately treated, can significantly reduce a driver’s ability to obtain restorative sleep, leading to fatigue, degraded alertness, and increased crash risk. The National Transportation Safety Board has previously recommended that the Federal Motor Carrier Safety Administration implement a program to identify commercial motor vehicle drivers at high risk for obstructive sleep apnea, and require that those drivers provide evidence through the medical certification process of having been appropriately evaluated and treated before being granted unrestricted medical certification.