programs / Passenger Vehicles


The reductions in passenger vehicle emissions that have been achieved since the mid-twentieth century are a great environmental success story. Government regulation of tailpipe emissions and private investments in breakthrough technologies such as the three-way catalytic converter have reduced emissions of nitrogen oxides, carbon monoxide, and hydrocarbons by 75 to 90 percent at a relatively small cost to consumers. Since California first established emission standards for passenger vehicles in the 1960s, different regulatory approaches have been adopted by the United States, Japan, and Europe, and each has been emulated to some degree in other parts of the world. Significant work remains to replicate these successes throughout the rest of the global fleet.

The massive impact of passenger vehicles on climate also remains to be addressed. The transportation sector is responsible for about one-quarter of energy-related greenhouse gas emissions worldwide. Passenger vehicles account for just under half of this total, and will remain the predominant source of these emissions for the foreseeable future.

Featured Work



Recently Released

Effectiveness of CO2-based feebate systems in the European passenger vehicle market
Econometric analysis aiming to identify the extent to which the observed reductions in CO2 emissions rates in the Netherlands and the UK can be attributed to CO2-based vehicle taxation.
Consultant report
U.S. Tier 3 vehicle emissions and fuel quality standards, final rule
Provides an overview of the requirements of the final rule, discusses the handful of significant changes from the 2013 proposed rule, and summarizes the overall impacts.
Policy update
Credit Trading in the US Corporate Average Fuel Economy (CAFE) Standard
Explains how compliance credit trading under the US CAFE standard is managed and executed in practice.



It's Official - Toyota Aygo Coming With New High Efficiency 1-Liter Engine
The 1-liter three-cylinder gasoline engine powering the outgoing...

Helsinki Bus Co. uses big data to boost <b>fuel economy</b>, driver performance
Using a data warehouse solution developed with CGI and a...

2014 Mercedes-Benz E 250 BlueTec Diesel: <b>Fuel-Economy</b> Review
In recent years—especially in the time since EPA fuel economy...

Wiscasset Ford helps ease the strain of frequent travel between New Hampshire, Maine
As drivers spend nearly an hour in their cars each day, vehicle...

Reducing Black Carbon Emissions from Diesel Vehicles
Impacts, Control Strategies, and Cost-Benefit Analysis A new...

Press roundup, March 2014
ClimateWire 31-Mar IPCC report cites risks...

[Press release] Cutting NOx emissions from ships: Feasibility of IMO Tier III implementation using SCR
For immediate release: 25 March 2014 ICCT study confirms...

[Press release] New ICCT study: Reassessing global potential for energy from biomass
For immediate release: 25 March 2014 Many climate change...

From the ICCT Blogs

Show vehicles or all-in: Differing electric vehicle strategies emerge
The discussion at a panel last week on the future of EVs highlighted the different approaches automakers are taking toward rolling out new plug-in electric vehicle models.
Staff Blog
Hybrids break through in the Japan auto market
Overall, fuel economy has improved by more than 70% in Japan since 1995, and the rate of improvement has averaged 6% annually over the past five years. Much of that can be attributed to the rise of hybrid electric vehicles.
Staff Blog
Driving down the cost of hybrid systems, €10 at a time
The cost of the P2 hybrid motor/generator and clutch assembly subsystem has fallen about 14% in just three years. It’s increasingly clear that we’re in an era in which the pace of vehicle technology innovation is accelerating.
Staff Blog

The Staff

Anup Bandivadekar
Anup Bandivadekar
Program Director / India Lead
John German
John German
Senior Fellow / US Co-Lead
Hui He
Hui He
Senior Policy Analyst / China Co-Lead
Fanta Kamakaté
Fanta Kamakaté
Chief Program Officer
Peter Mock
Peter Mock
Europe Managing Director / EU Lead