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Evolution of on-road vehicle exhaust emissions in Delhi

DSpace at IIT Bombay

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Title Evolution of on-road vehicle exhaust emissions in Delhi
 
Creator GOEL, R
GUTTIKUNDA, SK
 
Subject AIR-POLLUTION
PUBLIC TRANSPORT
AUTO-RICKSHAWS
MEGACITY DELHI
FUEL-ECONOMY
INDIA
INVENTORY
CITIES
POLICIES
QUALITY
Emissions inventory
Transport emissions
India
Fuel standards
 
Description For a 40-year horizon (1990-2030), on-road vehicle exhaust emissions were evaluated, retrospectively and prospectively, for the largest urban agglomeration in India - the Greater Delhi region with a combined population of 22 million in 2011 (Delhi along with Ghaziabad, Noida, Greater Noida, Faridabad and Gurgaon). Emissions of particulate matter, sulfur dioxide, carbon monoxide and volatile organic compounds (VOCs) reached their peak during late 1990s through early 2000s after which they reduced significantly through year 2012. On the other hand, nitrogen oxides (NOx) and carbon dioxide show an increasing trend. The most reduction in emissions between 1998 and 2012 occurred as a result of implementation of four sets of vehicular emission standards, removal of lead, reduction of sulfur content, mandatory retirement of older commercial vehicles, and conversion of diesel and petrol run public transport vehicles to compressed natural gas. In addition, changes in the vehicular technology have also contributed to controlling emissions especially in case of auto-rickshaws and motorized two-wheelers, which changed from two-stroke to four-stroke. The rising trend of NOx along with the presence of VOCs indicates increasing tendency to form ground-level ozone and as a result, smog in the region. We predict that the current regime of vehicle technology, fuel standards, and high growth rate of private vehicles, is likely to nullify all the past emission reductions by the end of 2020s. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T13:00:48Z
2016-01-14T13:00:48Z
2015
 
Type Article
 
Identifier ATMOSPHERIC ENVIRONMENT, 105,78-90
1352-2310
1873-2844
http://dx.doi.org/10.1016/j.atmosenv.2015.01.045
http://dspace.library.iitb.ac.in/jspui/handle/100/17561
 
Language en