“[Passenger vehicle efficiency technology] costs continue to decrease, proving that previous estimates, including those made by the federal regulatory agencies, have been too conservative. . . . Including these latest efficiency developments, compliance costs for the adopted 2025 standards will be 34%–40% lower than projected in the latest U.S. midterm evaluation regulatory analysis.”

Efficiency technology and cost assessment
for U.S. 2025–2030 LDV

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Recent Publications

Summary of the progress towards and challenges to the commercialization of sustainable alternative aviation fuels.

2019.01.15 | Briefing

This update, based on a statistical analysis of data for more than 1.3 million vehicles from eight European countries, shows the average gap between official fuel consumption figures and actual fuel use for new cars in the EU stabilized at 39...

2019.01.10 | White paper

Identifies adoption barriers and summarizes policy approaches for states, cities, and utilities to accelerate the deployment of electric vehicles in ride-hailing fleets.

2019.01.08 | Briefing

Staff Blog


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  • If we use livestock feed for biofuels, what will the cows eat?

    “Waste” biodiesel from corn oil probably drives up corn production and could have resulted in 500 thousand extra tonnes of CO2e emissions in 2017.

  • Real-world NOx emissions from remote sensing: An update of the TRUE rating

    We recently finished collecting, cleaning up, and crunching the numbers from a real-world emissions measurement campaign in London using remote sensing. And we've updated the TRUE rating that categorizes vehicles based on NOx emissions to incorporate the additional data. Here are the highlights.

  • U.S. airlines on track to meet one carbon goal, even without government leadership

    Airlines are expected to achieve their goal of an average improvement in fuel efficiency of 1.5% per year.

  • Put soot-free transport in your NDC

    Soot-free transport will deliver black carbon reductions, which can help achieve the near-term cooling needed to meet a 1.5˚ C target. Climate negotiators in Poland this week ought to bring it into their climate action strategies.

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    2018.12.04ICCT Event
    Conference | Brussels, Belgium
    2018.10.03ICCT Event
    Workshop | San Diego, CA, USA
    Workshop | Buenos Aires