Traffic emission pollution sampling and analysis on urban streets with high-rising buildings

Traffic emission pollution sampling and analysis on urban streets with high-rising buildings

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Article ID: iaor2003340
Country: United Kingdom
Volume: 6D
Issue: 4
Start Page Number: 269
End Page Number: 282
Publication Date: Jul 2001
Journal: Transportation Research. Part D, Transport and Environment
Authors: ,
Keywords: geography & environment, transportation: general
Abstract:

Air pollution at many types of intersections and other roadside ‘hot spots’ is not accurately characterized by state-of-the-practice models. In this study, data were collected on traffic flows, second-by-second CO and NO2 ambient concentrations in Shanghai, China. The sampled data were compared with CAL3QHC modeling results. We found that: (1) intersection hot spot emission concentrations were explained primarily by queuing activities of motor vehicles; (2) air quality concentrations are difficult to predict because of complex dispersion processes near high-rise buildings; and (3) screening models such as CAL3QHC are prone to large errors in dense citieis with mixed traffic and high-rising buildings. Suggestions are made for improved models relevant to dense developing cities.

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