This is a best practices State Resource Guide that discusses the alternative fuels and vehicles available today and the advanced technologies that will be available in the future. This guide reviews the alternative fuels and technologies currently available, examines ways for the government to promote greener transportation, and provides an overview of the core barriers to wider consumption of these new options, all in an effort to help the United States to reduce its reliance on petroleum, lower greenhouse gas (GHG) emissions, and secure a clean energy future.