The 2006 Prius with Hybrid Synergy Drive? combines a gas engine and an emissions-free electric motor to achieve amazing fuel economy and an Advanced Technology Partial Zero Emission Vehicle (AT-PZEV) rating - all with the performance of a conventional car. And to make up to 650 miles between fill-ups comfortable, there?s an available leather-trimmed interior and available features like Bluetooth? wireless technology, Smart Key System and backup camera. Plus you never need to plug-in for recharging. What more could you ask for? Well, several states give Prius owners carpool lane privileges.