Introduced to the U.S. in 2001, the Prius represents an icon of environmental conservation. When the Prius was redesigned for in 2004, it grew in both size and popularity. The Toyota hybrid system, give the Prius better fuel economy in city driving than on the highway. At lower speeds, the car is powered by electric motors thus minimizing gasoline consumption. On the highway, the aerodynamic design helps reduce drag and increase fuel economy. Many financial benefits exist for cars like the Prius such as tax incentives and single-occupant use of carpool lanes. The Toyota Prius comes with a five-year/60,000-mile powertrain warranty and gets an estimated 45 mpg on the highway.