Drowsiness and fatigue were the cause of 33% of deaths on motorways in 2012, according to an Asfa (Association of French Motorway Companies) study. Alcohol, drugs and medications were in second place (21%), in front of excessive speed (13%). The study also revealed that lack of sleep, driving at night, taking certain medications and suffering from sleep apnoea or snoring increase the risk of deadly accidents on motorways. Some professionals say that monotony on roads and reduced speeds are also factors tha