It's a shame it's not clear from the article why university students were testing emissions from a Jetta in the first place. Can anyone shed any light on this?
West Virginia University has the Center for Alternative Fuels Engines and Emissions as part of the engineering school, and they test lots of different vehicles and engine technologies. http://www.cafee.wvu.edu
They were commissioned by a European NGO, the international council on clean transportation (ICTT)[1]. The ICTT wanted to include diesel cars from the US market where regulation are stricter with intent to show that it was actually possible to have lower emission from diesel cars.
As stated at the beginning of their report[2]:
The Center for Alternative Fuels, Engines and Emissions
(CAFEE) at West Virginia University (WVU) was contracted
by the International Council on Clean Transportation
(ICCT) to conduct in-use testing of three light-duty
diesel vehicles, using a portable emissions measurement
system (PEMS), over a variety of pre-defined test routes
exhibiting diverse driving conditions pertinent to major
United States population centers located in the state of
California.
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