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.



2014 Land Rover LR4 HSE LUX
It seems as if most auto manufacturers are in a rush to downsize...

Mark Phelan: American Axle gains momentum with AWD system
AWD systems generally reduce a vehicle's fuel economy by 1...

Mexico may issue lax emissions plan: RSR
NEW YORK — Lead-acid battery recycler RSR Corp. is concerned...

Minnesota <b>Air Pollution</b> Control Law Blocked by Federal Judge (1)
Part of Minnesota's 2007 Next Generation Energy Act, a law...

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

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
China's fuel efficiency standard for cars: On track to meet 2015 goals—as long as enforcement isn't required
China is at the midpoint of a four-year phase-in period for the passenger car fuel-consumption target it adopted in 2011. It's a good time to take stock.
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