The Shell Eco Marathon is an automobile race, but instead of covering a given distance in the least time, the winner goes the farthest on a fixed amount of fuel. The idea is to build a vehicle that is as fuel efficient as possible. Most efficient vehicle wins. Included in the rules is a minimum speed: contestants have to average at least 15 km/h. The event serves as a testbed for trying out and displaying the fuel saving technologies and strategies of the future. I think we will be seeing more and more of this type of competition as gasoline gets more and more expensive.