Keith Veronese, "What is the most scientific way to optimize your driving time?" io9.com, 12/9/11. Online at: http://io9.com/5866122/what-is-the-most-scientific-way-to-optimize-your-driving-time
...For the sake of argument, let's say your average speed over the trip is 78 mph (126 kph) – eight miles above the limit in most states. You just risked a ticket, probably spent the last 3.6 hours of your life stressed out and paranoid, and killed your car's fuel efficiency to spend 24 extra minutes with your relatives - time that will likely be spent sitting in front of a television watching Storage Wars. You're a winner (in the game of life)!
If you take the national average for a gallon of low grade gasoline, $3.29, [less than today's prices] into account, along with a 12.8% percent decrease in fuel efficiency from driving the 70 mph speed limit, you just spent $4.51 for the privilege of spending those 24 minutes in expanded basic cable hell.