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A sharp increase in revenue passenger miles drove both profits and fuel consumption on domestic operations up between 2014 and 2016 for U.S. airlines. Alaska Airlines again ranked first in overall fuel-efficiency, while the gap between it and the least fuel-efficient carrier, Virgin America in 2016, widened slightly to 26%.

This update adds one new data source, for a total of 14, covering 16 years, eight countries, and approximately 1.1 million cars. The analysis shows that, in the EU, the gap between official and real-world CO2 emission values continues to grow—from 9% in 2001 to 42% in 2016.

Investigates the gap between real-world and official CO2 emission values in the four largest vehicle markets in the world: China, the EU, Japan, and the United States. The analysis shows that the gap has increased in all markets since 2001. 

2012.02.15

Summarizes and evaluates approaches to testing and certifying power-train systems and complete vehicles.

Publication: White paper
2011.10.04

Argues that studies of the effects of palm oil plantation expansion in SE Asia have significantly underestimated GHG emissions from palm oil grown on peatland, and therefore underestimate the indirect land use change emissions from many biofuels.

Publication: White paper
2011.10.04

Surveys technology and policy options available to China as it works to build a world-class vehicle emissions control program, drawing on experience in Europe, Japan, and the United States.

Publication: White paper
2011.07.21

Assesses various potential index parameters for vehicle emissions performance standards and analyzes the effects of different target systems on individual manufacturers and vehicles.

Publication: White paper
2011.07.08

Concisely summarizes a more detailed technical report on marginal costs of design standards, retrofit technologies, and operational measures that improve ship energy efficiency.

Publication: White paper
2011.06.24

A survey of the benefits of energy efficiency improvements for passenger vehicle tires, and of policies designed to promote those benefits in the EU, US, Japan, and South Korea.

Publication: White paper
2011.03.10

Part 4 of a five-part policy study, summarizing the current status of vehicle and infrastructure technologies.

Publication: White paper
2011.03.10

Part 2 of a five-part policy study, summarizing the current status of vehicle and infrastructure technologies.

Publication: White paper
2011.03.10

Part 1 of a five-part policy study, summarizing the current status of vehicle and infrastructure technologies.

Publication: White paper
2010.09.17

A critical assessment of one of the four consultation documents published by the European Commission to inform its 2010 consultation on indirect land use change.

Publication: White paper

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