Toyota presented prototype plug-in hybrid electric vehicles today to UC Irvine’s Advanced Power and Energy Program and UC Berkeley’s Institute of Transportation Studies as part of the company’s ongoing sustainable mobility development program with the two campuses. The vehicle is based on the current-generation Prius model, which was the world’s first hybrid vehicle. The prototypes are designed to run in electric mode more often and at higher speeds than the current Prius, which could substantially increase fuel economy and reduce tailpipe emissions. The vehicles also can be charged using an ordinary three-pronged power cord and a household electrical outlet. UCI’s testing will focus on analyzing the technical challenges and emissions benefits of plug-ins.