Source apportionment of traffic emissions of particulate matter using tunnel measurements (Abstract, Samantha Lawrence, Ranjeet Sokhi, Khaiwal Ravindra, Hongjun Mao, Hunter Douglas Prain, Ian D. Bull, Atmospheric Environment, Apr. 10, 2013)
Also discussed here: Estimation of the contribution of road traffic emissions to particulate matter concentrations from field measurements: A review(abstract, Pallavi Pant, Roy M. Harrison, Atmospheric Environment, Oct. 2013)
And here: ‘Only a third’ of traffic pollution caused by exhaust(Air Quality news, Jun. 5, 2013)
Today we review research that carefully estimated what portion of outdoor air pollution comes from vehicle tail pipes and other sources. The answer is that nearly half of the pollution comes from a variety of sources other than exhaust, including brake wear, road wear and dust and particles thrown into the air by passing vehicles. This in turn points the need for corrective action to these secondary sources, by developing less polluting tires and constructing roads better and as well as standards to apply to them, as well as to vehicle emissions.
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