This report provides a summary of recent trends in the development of alternative fuel technologies and factors impacting their adoption by the passenger vehicle and commercial vehicle fleets. Researchers relied on government, academic, and private-sector resources in compiling this report. This report also discusses the potential revenue impacts to the State of Texas with a specific focus on how alternative fuel technology adoption could affect long-term state fuel tax revenues. Finally, this report includes summary information and discussion on federal, state, and local incentives aimed at encouraging alternative vehicle technology development, deployment, and adoption.