Ashenfelter, Orley; Greenstone, Michael - In: Journal of Political Economy 112 (2004) S1, pp. 226-226
In 1987 the federal government permitted states to raise the speed limit on their rural interstate roads, but not on their urban interstate roads, from 55 mph to 65 mph. Since the states that adopted the higher speed limit must have valued the travel hours they saved more than the fatalities...
