According to the National Highway Traffic Safety Administration's census of fatal crashes, it is estimated that in 2017, 91,000 police-reported crashes involved drowsy drivers. These crashes led to an estimated 50,000 people injured and nearly 800 deaths. There is broad agreement across the traffic safety, sleep science, and public health communities that this is an underestimate of the impact of drowsy driving.
Learn more on NHTSA's website at: Drowsy Driving: Avoid Falling Asleep Behind the Wheel | NHTSA