Title: Traffic reallocation impacts and automobile toxic pollutants emission for a general network in urban highway system: a second-best congestion pricing analysis

Authors: Daqiang Chen

Addresses: School of Computer Science and Information Engineering, Zhejiang Gongshang University, No.18, Xuezheng Str., Xiasha University Town, Hangzhou 310018, China

Abstract: This paper examines temporal, spatial and modal effects of second-best congestion pricing schemes in traffic volume reallocation, traffic mode shifting and automobiles toxic pollutants emission control in urban road systems. A problem in two time periods (peak and off-peak) and two travel modes (private car and bus) on one-way network is analysed, and a second-best congestion pricing model with multiple time periods and travel modes is constructed using an excess-demand approach. The paper provides a thorough empirical study of second-best scenario and two extreme regimes: no-toll problem and first-best problem. The main findings are: congestion pricing policies have major impacts: 1) diversion of tolled route to the free route; 2) shift of peak period traffic to the off-peak period; 3) shift of traffic volume by private car to bus; 4) reduction in total traffic volume and increase in total passenger volume (private car and bus); 5) reduction in the total emission amount of automobiles' toxic pollutants.

Keywords: environmental pollution; urban highways; urban roads; second-best congestion pricing; elastic demand; vehicle emissions; toxic pollutants; traffic reallocation; traffic mode shifting; private cars; buses; tolled routes; free routes.

DOI: 10.1504/IJEP.2013.058819

International Journal of Environment and Pollution, 2013 Vol.53 No.1/2, pp.64 - 86

Received: 30 Mar 2013
Accepted: 18 Oct 2013

Published online: 22 Jan 2014 *

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