Did you know the national 55-mph speed limit (when it still existed) was enacted not as a life-saving measure (that was the unexpected benefit) but as a fuel-saving measure? Fuel mileage for vehicles rapidly declines at speeds above 60 mph. In fact, according to the DOT, each five mph over 60 you drive is like paying an additional $.29 for gas (at a U.S. national average of $3.65 per gallon). Slowing down can save you as much as 12 percent on gas versus speeding. That might be worth extending your trip by a few minutes!
The above was written by Garrett McKinnon and was published in the Fall 2011 edition of Vehicle MD.