کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4442033 1311134 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The impact of a Bus Rapid Transit system on commuters' exposure to Benzene, CO, PM2.5 and PM10 in Mexico City
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
The impact of a Bus Rapid Transit system on commuters' exposure to Benzene, CO, PM2.5 and PM10 in Mexico City
چکیده انگلیسی

Carbon monoxide (CO), benzene and other volatile organic compounds (VOCs) and suspended particles PM2.5 and PM10 were measured inside public transportation vehicles, before and after a new Bus Rapid Transit (BRT) system was implemented in Mexico City in June 2005. The objective was to evaluate the BRT system's impact on commuters' exposure to these air pollutants. The BRT system replaced conventional transport modes along 20 km of Insurgentes Avenue, and features confined corridors and new articulated diesel buses. We assessed the impact of the transportation mode on commuters' exposure using least squares regression models. We also analyzed the chemical composition of VOCs to evaluate the possible origin of these species. The implementation of the BRT system resulted in reductions in commuters' exposure to CO, benzene and PM2.5 ranging between 20% and 70%. No significant reductions in PM10 exposure were observed. Lower commuting times further reduced total commuters' exposure. Major sources affecting VOCs inside all transport modes are likely to be related to traffic and to emissions from the use of Liquefied Petroleum Gas. The results suggest that BRT systems could in general be an effective means of reducing human exposure to traffic related air pollutants and associated health impacts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 42, Issue 35, November 2008, Pages 8194–8203
نویسندگان
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