29 Dec '14, 11am

Study finds 2008 recession contributed to increase in age of US LDV fleet, slowing of emission reductions

Study finds 2008 recession contributed to increase in age of US LDV fleet, slowing of emission reductions 29 December 2014 The global economic recession of 2008—which severely depressed light-duty vehicle sales—resulted in an increase in the age of the light-duty vehicle fleet in the US that likely slowed the rate of decrease of fleet average emissions, according to a study by Gary Bishop and Donald Stedman at the University of Denver. In general, on-road vehicle fleet emission factor increases are correlated with increasing age. Over the last two decades in the US, US owners have been keeping their vehicles longer as vehicle prices and reliability have increased, leading to a “slow and steady ” increase in the average age of the registered US fleet from approximately 8.5 years old in 1995 to just over 11 years old in 2012, the authors note in their paper, published in the...

Full article: http://www.greencarcongress.com/2014/12/20141229-stedman....

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