Solving Large-scale Urban Transportation Problems by Combining the Use of Multiple Traffic Simulation Models
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Author(s)
Osorio Pizano, Carolina
Selvam, Krishna Kumar
Date Issued
April 2015
Journal
Transportation Research Procedia
Publisher
Elsevier BV
Citation
Osorio, Carolina, and Krishna Kumar Selvam. “Solving Large-Scale Urban Transportation Problems by Combining the Use of Multiple Traffic Simulation Models.” Transportation Research Procedia 6 (2015): 272–284 © 2015 The Authors
Version
Final published version
Abstract
Transportation agencies often resort to the use of traffic simulation models to evaluate the impacts of changes in network design or network operations. They often have multiple traffic simulation tools that cover the network area where changes are to be made. Nonetheless, these multiple simulators may differ in their modeling assumptions (e.g., macroscopic versus microscopic), in their reliability (e.g., quality of their calibration) as well as in their modeling scale (e.g., city-scale model versus regional-scale model). The choice of which simulation model to rely on, let alone of how to combine their use, is intricate. A larger-scale model may, for instance, capture more accurately the local-global interactions; yet may do so at a greater computational cost. This paper proposes a methodology that enables the simultaneous use of multiple traffic simulation models.
We propose a simulation-based optimization algorithm that embeds information from simulation models with different levels of accuracy and with different levels of computational efficiency. The algorithm combines the use of high-accuracy low-efficiency models with low-accuracy high-efficiency models. This combination leads to an algorithm that can identify points with good performance at a reduced computational cost.
We evaluate the performance of the algorithm with a traffic signal control problem on a small network. We show that the proposed algorithm identifies signal plans with excellent performance, i.e., with reduced average trip travel times, while doing so with a reduction in the computational cost. Keywords: simulation; large-scale optimization; multi-model; queueing theory; signal control
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/J.TRPRO.2015.03.021
