Highway related deaths are down are down to its lowest rates , since 1949. Why do you think this is?

Maybe, we should all pat ourselves on the back for using our seatbelts and companies making safer automobiles. And, lets not forget stepped-up law enforcement against drunk drivers and non-use of seatbelts. Question: are drivers really driving safer or are these figures inflated, because we are driving less because of the cost of fuel?

Source: AP