Can the speed-dial reduce speeding

By Tom Vanderbilt: I.D. – Please Touch That Dial
A nice article on the history of the design of the speedometer display in American cars, and why it might lead to speeding. There is an empirical test to be done here: Were cars with a speed dial that only went 90 mph less likely to speed (or otherwise safer) than cars with a speed dial that goes to 160, ceteris paribus?