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Review and evaluation of vehicle fuel efficiency labeling and consumer information programs

Vehicle Fuel Efficiency Labeling (VFEL) is used by numerous countries worldwide to improve the fuel efficiency of their transport fleets. The theory behind VFEL is that better-informed consumers are...
Published 2016.01.27: Publication

Naughty or nice? Automakers and US efficiency standards

Well, it’s that time of year again! No, no, not the holidays. It’s that time of year when the U.S. EPA releases authoritative information on how the automakers are doing in meeting their carbon...Helping out old St. Nick, as he's making his list and checking it twice, with the new vehicle efficiency data in the EPA’s 2015 Trends and Manufacturer Performance reports.
Published 2015.12.17: Blog Post

Transatlantic airline fuel efficiency ranking, 2014

This report compares the fuel efficiency, and therefore carbon intensity, of the top 20 airlines on transatlantic routes between North America and Europe in 2014. It is the first analysis to combine...
Published 2015.11.16: Publication

South Korea fuel economy and greenhouse gas standards for new LDVs 2016-2020

On December 30, 2014, the Ministry of Environment (ME) announced the new average fuel economy (FE) and greenhouse gas (GHG) standards1 for light-duty vehicles (notification no. 2014-235). A nearly...
Published 2015.10.28: Publication

U.S. domestic airline fuel efficiency ranking, 2014

This study, the fourth in a series of yearly analyses of U.S. airlines on domestic operations, arrives as we near a potential turning point for public policy concerning aviation and the environment....
Published 2015.10.22: Publication

China still lagging on fuel consumption in 2014

Following the timeline determined in the Corporate Average Fuel Consumption (CAFC) accounting rule, China's Ministry of Industry and Information Technology (MIIT) released its 2014 CAFC report in...With an average fuel consumption of 7.22 L/100km for the 2014 passenger vehicle fleet, will China be able to meet the national fuel consumption goal of 6.9 L/100km in 2015?
Published 2015.09.18: Blog Post

Vehicle emissions testing in the EU: Why we are still struggling with the dead hand of the past—and what the future is likely to bring

The Committee on Climate Change (CCC) was established in 2008 to advise the British government on emissions targets and report to Parliament on progress made in reducing greenhouse gas emissions and...Manufacturers effectively exploit loopholes in the vehicle CO2 emissions test procedure. The WLTP will help, but can't solve the problem entirely; we need in-use conformity and on-road testing in the...
Published 2015.09.09: Blog Post

Will new U.S. truck standards bring “SuperTrucks” to the market?

As we’ve indicated previously, there is a lot at stake with the proposed U.S. truck efficiency standards. This was made even more evident by the input from many stakeholders at the recent EPA and...Compared with the U.S. Deptarment of Energy SuperTruck demonstrations, just how “Super” are the proposed US tractor-trailer standards for model year 2027? Not very.
Published 2015.08.31: Blog Post

Why heavy-duty engine standards put India on the best path forward

Last week, my colleague Anup Bandivadekar and I held a webinar to discuss the heavy-duty truck and bus market in India and considerations for an upcoming regulatory program to improve the fuel...Efficiency standards for engines are the most advantageous regulatory design option for India to maximize near-term fuel savings and emission reduction benefits from new heavy-duty vehicles. Engine...
Published 2015.08.25: Blog Post

What do the new truck regulations mean for pickups?

With the Obama administration’s proposed truck efficiency rules, nearly everyone is focused on what they will mean for engines and tractor-trailers. We’re certainly guilty of that, with our technical...Sales of heavy pickups are over half of all the trucks covered by the new rules, and they account for 15%–20% of fuel use by U.S. trucks. The rules could have a large and widespread impact.
Published 2015.08.17: Blog Post

The ever-improving efficiency of the diesel engine

Rudolf Diesel in the 1880s said, “The automobile engine will come, and then I will consider my life's work complete.” He clearly knew how big a deal his invention was. But whatever judgment should be...A strong case can be made that the pending U.S. decision on HDV engines standards should push the technology envelope as hard as is feasible based on emerging efficiency technologies.
Published 2015.08.14: Blog Post

What is at stake in the U.S. truck efficiency rule

In the California Air Resources Board hearing on July 23, 2015, the Board received testimony from stakeholders on how the federal U.S. rulemaking on heavy-duty vehicle efficiency might change. One of...The proposed rule is expected to reduce GHG emissions 150 MMT/year by 2040, and cut oil use in the U.S. by over a 1M bbl/day. But how much further might it go?
Published 2015.08.12: Blog Post

Market analysis of heavy-duty vehicles in India

The Government of India has begun the formal process of considering regulation of the fuel efficiency of new trucks and buses. In any regulatory development process, a thorough understanding of the...
Published 2015.08.10: Publication

Hybrids break into the Japanese market (July 2015 update)

Japan's 2013 passenger vehicle fuel economy guide is out (Japanese only), and for those interested in these matters it provides much food for thought. The most striking finding is that the fuel...Japan's just-released 2013 data shows that fuel economy of new PVs there improved 7% in 2012–2013, from 21.1 to 22.5 km/L (10-15 mode). Fuel economy is up more than 80% since 1995, and averaged 6%...
Published 2015.07.28: Blog Post

Parsing Phase 2: Tractor-trailers in the proposed regulation

The proposed new "Phase 2" standard for heavy-duty vehicle fuel consumption and GHG emissions in the U.S. is long and complex (find a concise summary here) — not surprising, because the HDV...One way to begin to cut through the complexity of the proposed new "Phase 2" standard for heavy-duty vehicle fuel consumption and GHG emissions is to look at the vehicle category most of us are most...
Published 2015.07.23: Blog Post

U.S. efficiency and greenhouse gas emission regulations for MY 2018–2027 heavy-duty vehicles, engines, and trailers

On June 19, 2015, the U.S. Environmental Protection Agency and the National Highway Traffic Safety Administration jointly proposed new standards to reduce the fuel consumption and greenhouse gas...
Published 2015.06.25: Publication

Cleaning up big trucks to deliver a cleaner future

[Originally published on HuffPost Green] Tractor trailers and other medium and heavy trucks are the hard working giants of the American highway. They are also a disproportionately large part of our...Tractor trailers and other medium and heavy trucks are the hard working giants of the American highway. They are also a disproportionately large part of our nation's carbon footprint.
Published 2015.06.24: Blog Post

5 numbers you need to know about the proposed U.S. truck efficiency rule

Today the U.S. Environment Protection Agency and the National Highway Traffic Safety Administration released a notice of proposed rulemaking (NPRM) for heavy-duty vehicle fuel-efficiency and...It's a complex proposal, and will take some time to fully digest, but some of the highlights regarding the complexity, the technology improvements, and the benefits are immediately clear. Here is the...
Published 2015.06.19: Blog Post

Heavy-duty vehicle fuel-efficiency simulation: A comparison of US and EU tools

Vehicle simulation tools can enable a reliable estimation of the fuel efficiency of heavy-duty vehicles while eliminating undesirable sources of variation, such as driver behavior or the influence of...
Published 2015.05.11: Publication

Choose Your Own Adventure: By Plane, Car, Train, or Bus?

Is flying really greener than driving? In previous work, we concluded that it’s likely not – at least for the average flight and road trip on comparable distances (300 to 500 mile trips). In a new...Is flying really greener than driving? On average, no, but it does depend on the fuel economy of your vehicle as well as the number of passengers.
Published 2015.04.30: Blog Post

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