Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/84738
Title: Simultaneous Occurrence of the Braess and Emission Paradoxes
Authors: Szeto, W.Y. 
Li, X.
O'Mahony, M.
Keywords: Braess' paradox
Emission paradox
Traffic assignment
Issue Date: 2008
Source: Szeto, W.Y.,Li, X.,O'Mahony, M. (2008). Simultaneous Occurrence of the Braess and Emission Paradoxes. Proceedings of the Conference on Traffic and Transportation Studies, ICTTS 322 : 625-634. ScholarBank@NUS Repository.
Abstract: Braess' paradox is well-known and examined. However, an emission paradox, an analogue to Braess' paradox for vehicular emissions, is not. Without considering the emission paradox, the road network improvement that mitigates congestion may increase harmful vehicular emissions. In this paper, we analytically examine the occurrence of the emission paradox and the simultaneous occurrence of the Braess and emission paradoxes in the classical Braess' network. We ascertain that the occurrence of the emission paradox depends on the demand for travel, the parameters of link performance functions as well as link emission factors. We also find that the Braess and emission paradoxes do not always occur at the same time, and that the emission paradox is more likely to occur than the Braess paradox in some networks. More importantly, we discover that under some conditions of the parameters of link performance functions, the emission paradox does occur but Braess' paradox does not. This implies that road network design for mitigating congestion alone may not be able to avoid the increase in vehicular emissions. A more comprehensive view for road network design is necessary to avoid the occurrence of both the Braess and emission paradoxes.
Source Title: Proceedings of the Conference on Traffic and Transportation Studies, ICTTS
URI: http://scholarbank.nus.edu.sg/handle/10635/84738
ISBN: 9780784409954
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

45
checked on Jan 19, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.