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Addresses several common misconceptions about light-duty vehicle fuel efficiency and greenhouse gas standards and focuses on Australia’s proposed light-vehicle CO2 standards and the effects they may or may not have on Australian motorists.

Provides a synthesis of information regarding the global development of hydrogen fueling infrastructure to power fuel cell vehicles. Compiles research on hydrogen infrastructure deployment, fuel pathways, and planning based on developments in the prominent fuel cell vehicle growth markets around the world.

Analyzes the benefits of establishing separate engine CO2 standards in addition to full-vehicle regulations to specifically drive improvements in heavy-duty engine efficiency. Outlines a possible pathway for the development and implementation of separate engine CO2 standards for heavy-duty vehicles within the regulatory framework of the European Union.


Summarizes the status of electric vehicle market in California through 2016, quantifying electric vehicle market growth across California cities and metropolitan areas.

Publication: Briefing

Evaluates the trajectory of GHG emissions from international aviation in the U.S. and Canada as well as the possible GHG reductions that could be made from deployment of alternative jet fuels (AJFs) within the framework of the International Civil Aviation Organization’s (ICAO) Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA).

Publication: Briefing

Reviews the political science, regulatory, and economics literature to illuminate the international competitiveness impacts of motor vehicle emission standards.

Publication: Briefing

Evaluates the effect of Euro VI-equivalent emissions standards on bus system costs in Brazil.

Publication: Briefing

Highlights important innovations and trends in vehicle design technology and lightweighting, many of which were not considered when the 2025 CAFE standards were finalized, but promise to be quite cost-effective.

Publication: Briefing

Reviews the structure of EPA’s emission recall program for light-duty vehicles and trucks (LDV and LDT) and its effectiveness over time and also explains the recall authority, procedures, and coordination among offices.

Publication: Briefing

Identifies key differences in the regulations governing certification of NOx emissions from diesel cars (Euro 6) and trucks (Euro VI) that help explain differences in their real-world emissions performance. Ultimately, an examination of the HDV regulation reveals insights that could be used to improve the LDV regulation.

Publication: Briefing

This technical brief highlights important innovations and trends in downsized and turbocharged gasoline engines, several of which were not considered when the 2025 CAFE standards were finalized, but promise to be quite cost-effective.

Publication: Briefing

A concise overview of the EU's vehicle CO2 emission reduction requirements, targets for 2025–2030 that are coming under consideration, and current best projections of vehicle-specific CO2 reduction technology potential and costs in that time frame.

Publication: Briefing

Highlights developments in technologies that contribute to vehicle fuel efficiency by improving control of heat in the powertrain and the passenger cabin. Few thermal management technologies were explicitly incorporated into the technology projections for the US 2025 CAFE standards.

Publication: Briefing