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Journal of Advanced Transportation
Volume 2017, Article ID 5161308, 14 pages
Research Article

Understanding Air Pollution from Induced Traffic during and after the Construction of a New Highway: Case Study of Highway 25 in Montreal

1Civil Engineering (Highways & Transportation Engineering), Faculty of Engineering, Environment & Computing, Coventry University, Priory St., Coventry, West Midlands CV1 5FB, UK
2Department of Building, Civil and Environmental Engineering, Concordia University, 1515 St. Catherine Ouest, Montréal, QC, Canada H3G 1M8

Correspondence should be addressed to Md. Shohel Reza Amin;

Received 30 April 2017; Revised 12 September 2017; Accepted 27 September 2017; Published 31 October 2017

Academic Editor: Alexandre De Barros

Copyright © 2017 Md. Shohel Reza Amin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study demonstrates through a case study that detailed analyses, even after the construction of a project, are feasible using current technologies and available data. A case study of highway 25 is used to illustrate the method and verify the levels of air contaminants from additionally induced traffic during and after the construction of highway. Natural traffic growth was removed from the effect of observed gas emissions by comparing observed levels on other further locations in the same metropolitan area. This study estimates air pollution from the additional traffic during and after the construction of A-25 extension project. NO2 levels were spatially interpolated during peak and off-peak hour traffic and traffic density simulated on the road network for four scenarios. Comparing the four scenarios, it was found that levels of NO2 concentrations were reduced at neighbor areas due to less traffic during the construction period. Levels of NO2 after the construction were higher than those in 2008. The simulated traffic density for four scenarios revealed that traffic density was significantly increased on both arterial and access roads within the close vicinity of the extension project during and after its construction.