Large interstate bus crashes have brought awareness to driver fatigue as fatal crash reports grow bigger.
Two weeks ago four women in Virginia were killed and many were injured when the driver of a 59-passenger bus toppled northward on Interstate 95. The bus was traveling from North Carolina to New York as it flipped over once the driver woke up and swerved back onto the road.
The driver, Kin Yui Cheung, age 37, is charged with four counts of involuntary manslaughter. Sleep scientists and safety advocates say the roots of these accidents are within an industry whose economic model usually end in drivers on the road crashing with too little rest.