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The Reinventing Fire transportation analysis evaluates efficiency pathways for U.S. autos, heavy trucks, and airplanes through 2050. It distinguishes between 'Improved Design' (technological upgrades) and 'Improved Use' (reducing vehicle-miles traveled), while incorporating a consumer adoption model for high-efficiency vehicles and a supply-cost model for inedible biofuels. The methodology integrates these findings into an economy-wide model to calculate net present value savings, estimating a total net saving of $3,757 billion in 2009 dollars.

The document provides technical instructions for using the Demand Branch Properties screen in LEAP to specify the fuel economy of newly purchased vehicles. It details the available units of measurement, the use of lifecycle profiles to account for vehicle aging, and the software's ability to automatically calculate stock average fuel economy based on sales and survival data. It also emphasizes the importance of entering historical fuel economy values to ensure accurate base year stock average calculations.

The document analyzes the U.S. transportation sector's contribution to global warming, noting it is the second-largest source of emissions, primarily driven by light-duty vehicles. It proposes a three-pronged approach: improving vehicle and air conditioning efficiency, transitioning to low-carbon fuels (such as cellulosic biofuels, electricity, and hydrogen), and reducing vehicle miles traveled (VMT) through smart growth and transit expansion. The report details specific fuel economy targets for 2020 and 2030 and advocates for performance-based emission standards over traditional fuel economy standards to better account for non-CO2 emissions and alternative fuels.

The report outlines the assumptions used to model transportation emissions reductions by 2030, including fuel economy targets, the adoption of plug-in hybrids, and the deployment of cellulosic ethanol. It describes adjustments made to the AEO 2008 model to reflect more aggressive efficiency standards and the impacts of smart growth policies.

The document advocates for immediate action to combat climate change using existing technologies. It identifies fossil fuel combustion and deforestation as the primary drivers of CO2 increase and proposes five 'common sense' solutions: increasing vehicle fuel efficiency, modernizing the electricity system with renewables, improving energy efficiency in buildings, protecting forests, and increasing federal R&D for clean energy. It emphasizes that these steps would reduce emissions while saving consumers money and enhancing energy security.

The report assesses fuel cell vehicles (FCVs) as a path toward a clean-vehicle future in the US, focusing on hydrogen and methanol as primary fuels. It analyzes the environmental benefits, such as the potential for 'zero-emission vehicles' (ZEVs) when using renewable hydrogen, and compares FCV performance and safety to gasoline vehicles. The document also addresses the infrastructure challenges of hydrogen distribution and the economic value of reducing urban air pollution in cities like Los Angeles and New York City.