Routing strategy including time and carbon dioxide emissions

effects on network performance

Conference Paper (2016)
Author(s)

Fan Zhang

Y Chen (TU Delft - Transport and Planning)

B. Goni Ros (TU Delft - Transport and Planning)

Jian GAO

VL Knoop (TU Delft - Transport and Planning)

Research Group
Pavement Engineering
Copyright
© 2016 Fan Zhang, Y. Chen, B. Goni Ros, Jian GAO, V.L. Knoop
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 Fan Zhang, Y. Chen, B. Goni Ros, Jian GAO, V.L. Knoop
Research Group
Pavement Engineering
Pages (from-to)
1-16
Reuse Rights

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Abstract

Traffic congestion leads to delays and increased carbon dioxide (CO2) emissions. Traffic management measures such as providing information on environmental route costs have been proposed to mitigate congestion. Multi-criteria routing dynamic traffic assignment (MCR-DTA) models are needed to evaluate the effectiveness of such measures. This paper presents a simulation-based bi-level optimization method to solve the MCR-DTA problem, which works as follows. Route costs include travel times and emissions, but those are updated inside two different loops. In the inner loop, emission costs are considered fixed; the assignment is performed by updating route travel times, using a traditional DTA tool. Then, in the outer loop, emissions are calculated based on link loads and fed back to the DTA tool, which performs a new assignment. The MCR user equilibrium is found when emissions or predefined generalized costs converge to an equilibrium. The bi-level method is first tested on a small network, showing that the proposed method is able to effectively solve the MCR-DTA problem. Next, the method is applied to a medium-size urban network. The results show that if drivers choose routes based on emissions besides travel time, the average travel time and emissions per vehicle decrease. This occurs because congested links have a higher impact on route costs; hence the equilibrium is pushed away from the single-criteria routing (SCR) user optimum towards the SCR system optimum. Results support the conclusion that informing drivers about CO2 emissions per route can potentially lead to decreased delay and emissions in real networks.

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