The FreedomCAR and Fuel Partnership is a collaborative effort among the Department of Energy (DOE), the U.S. Council for Automotive Research (USCAR), and five major energy companies to manage research that will enable the vision of a clean and sustainable transportation energy future. It envisions a transition from more efficient internal combustion engines (ICEs), to advanced ICE hybrid electric vehicles, and to enabling a private-sector decision by 2015 on hydrogen-fueled vehicle development. At the request of DOE, the NRC has undertaken an effort to provide biennial reviews of the progress of the research program. Phase I of that review was described in a book issued in 2005. This second book presents an assessment of the progress in the research program management areas as well as the responses of program management to recommendations provided in the Phase I report. Covered in this second book are major crosscutting issues; vehicle subsystems; hydrogen production, delivery, and dispensing; and an overall assessment of the program.