New vehicle emissions show record improvement

Oct 05, 2012

Emissions from new vehicles are down a record 20 percent in the last five years, say researchers at the University of Michigan Transportation Research Institute.

U-M's national Eco-Driving Index, which estimates the average monthly of generated by an individual U.S. driver, stood at 0.80 in July—down from 0.82 in both May and June (the lower the value, the better).

It's the lowest value on record since UMTRI researchers Michael Sivak and Brandon Schoettle began monitoring emissions in October 2007. The EDI takes into account both vehicle fuel economy and distance driven—the latter relying on data that are published with a two-month lag.

"Emissions are down because we're driving more fuel-efficient vehicles and we're driving less," Sivak said.

In addition to EDI, Sivak and Schoettle issued their monthly update of fuel economy of all . They found that average fuel economy (window-sticker values) of cars, , minivans and SUVs purchased in September was 23.8 mpg, the same as in August, but tied for the fourth-best month on record. It marks an 18 percent increase (3.7 mpg) from October 2007.

Explore further: Electromobility, efficient and safe: Visio.M consortium presents new electric car

More information: Eco-Driving Index calculations, along with a graph and table of current and recent values: www.umich.edu/~umtriswt/EDI_values.html
Fuel economy calculations, along with a graph and table of current and recent mpg: www.umich.edu/~umtriswt/EDI_sa… es-weighted-mpg.html

add to favorites email to friend print save as pdf

Related Stories

Vehicle fuel economy stays the same in July

Aug 03, 2012

(Phys.org) -- After a three-month drop, fuel economy of all new vehicles sold in the United States remained unchanged in July, say researchers at the University of Michigan Transportation Research Institute.

Vehicle fuel economy falls again in May

Jun 06, 2012

(Phys.org) -- For the second straight month, fuel economy of all new vehicles sold in the U.S. fell by 0.2 mpg—likely reflecting a slight drop in gas prices, say researchers at the University of Michigan ...

Vehicle fuel economy down again in June

Jul 10, 2012

(Phys.org) -- Fuel economy of all new vehicles sold in the United States has dropped for the third month in a row—likely reflecting the continuing reduction in gas prices, say researchers at the University of Michigan ...

Fuel economy of new vehicles continues to rise

Dec 06, 2011

(PhysOrg.com) -- Average fuel economy of all new vehicles sold in the United States is up for the second straight month, say researchers at the University of Michigan Transportation Research Institute.

Fuel economy slipped as gas prices dipped throughout April

May 09, 2012

(Phys.org) -- After recently topping 24 miles per gallon for the first time ever, fuel economy of all new vehicles sold in the United States slipped back below that mark last month, say researchers at the University of Michigan ...

Recommended for you

First-of-a-kind supercritical CO2 turbine

13 hours ago

Toshiba Corporation today announced that it will supply a first-of-a-kind supercritical CO2 turbine to a demonstration plant being built in Texas, USA. The plant will be developed by NET Power, LLC, a U.S. venture, together w ...

Drive system saves space and weight in electric cars

Oct 17, 2014

Siemens has developed a solution for integrating an electric car's motor and inverter in a single housing. Until now, the motor and the inverter, which converts the battery's direct current into alternating ...

Dispelling a misconception about Mg-ion batteries

Oct 16, 2014

Lithium (Li)-ion batteries serve us well, powering our laptops, tablets, cell phones and a host of other gadgets and devices. However, for future automotive applications, we will need rechargeable batteries ...

Turning humble seaweed into biofuel

Oct 16, 2014

The sea has long been a source of Norway's riches, whether from cod, farmed salmon or oil. Now one researcher from the Norwegian University of Science and Technology (NTNU) researcher hopes to add seaweed ...

User comments : 0