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Mathematical Problems in Engineering
Volume 2013, Article ID 736285, 6 pages
Research Article

A Study on the Model of Traffic Flow and Vehicle Exhaust Emission

1Institute of Development Studies, Shougang Corporation, Beijing 100082, China
2School of Management and Economics, Beijing Institute of Technology, Beijing 100081, China
3Beijing Automotive Research Institute Company Limited, Beijing 100079, China

Received 9 September 2013; Revised 16 November 2013; Accepted 2 December 2013

Academic Editor: Wuhong Wang

Copyright © 2013 Han Xue 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.


The increase of traffic flow in cities causes traffic congestion and accidents as well as air pollution. Traffic problems have attracted the interest of many researchers from the perspective of theory and engineering. In order to provide a simple and practical method for measuring the exhaust emission and assessing the effect of pollution control, a model is based on the relationship between traffic flow and vehicle exhaust emission under a certain level of road capacity constraints. In the proposed model, the hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides ( ) are considered as the indexes of total exhaust emission, and the speed is used as an intermediate variable. To verify the rationality and practicality of the model, a case study for Beijing, China, is provided in which the effects of taxi fare regulation and the specific vehicle emission reduction policy are analyzed.