Individual exposure to traffic related air pollution across land-use clusters

In this study, the authors estimated the transportation-related emissions of nitrogen oxides (NOₓ) at an individual level for a sample of the Montreal population. Using linear regression, the authors quantified the associations between NOₓ emissions and selected individual attributes. The authors then investigated the relationship between individual emissions of NOₓ and exposure to nitrogen dioxide (NO₂) concentrations derived from a land-use regression model. Factor analysis and clustering of land-uses were used to test the relationships between emissions and exposures in different Montreal areas. The authors observed that the emissions generated per individual are positively associated with vehicle ownership, gender, and employment status. The authors also noted that individuals who live in the suburbs or in peripheral areas generate higher emissions of NOₓ but are exposed to lower NO₂ concentrations at home and throughout their daily activities. Finally, the authors observed that for most individuals, NO₂ exposures based on daily activity locations were often slightly more elevated than NO₂ concentrations at the home location. The authors estimated that between 20% and 45% of individuals experience a daily exposure that is largely different from the concentration at their home location. Our findings are relevant to the evaluation of equity in the generation of transport emissions and exposure to traffic-related air pollution. The authors also shed light on the effect of accounting for daily activities when estimating air pollution exposure.

Language

  • English

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Filing Info

  • Accession Number: 01603459
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 2016 12:29PM