2014 MAN Trucks MAN trucks has teamed up with trailer builder Crone to build a futuristic, streamlined semi that could improve the fuel economy and range of long haulers by 25 percent. The Concept S and Aero Liner combo features an integrated design with a smooth and rounded face that looks like something from "The Clone Wars," a rooftop spoiler closing the gap between tractor and trailer, and an aerodynamic hunchback roof not unlike that of the Toyota Prius. www.repokar.com