In general, almost all drivers who are sleep-deprived or are doing shift driving are prone to drowsy driving conditions. But if specifically, you ask, what type of driver is most at risk for drowsy driving, then you can consider the following group of people: (1) Young males, specifically under 26 years. (2) Commercial drivers who have to drive for long hours. (3) Shift workers who have to drive at night and who drive more than 60 hours a week. (4) Business travelers who have suffered jet lags or do heavy driving. (5) People who have sleep disorders like sleep apnea that remains untreated.