Large-Scale Microscopic Simulation: Toward an Increased Resolution of Transportation Models
Publication: Journal of Transportation Engineering
Volume 134, Issue 7
Abstract
Recent years have witnessed an interest in increasing the resolution of transportation models to allow them to better address emerging transportation issues, such as concerns about emissions, air quality, and emergency preparedness. Microscopic simulation models, especially those that combine routing logic with accurate modeling of traffic flow dynamics, have vast untapped potential for modeling large-scale transportation networks and for achieving the resolution level required for addressing such emerging issues. Building and calibrating such models, however, is quite challenging and is currently not widely understood. This paper describes the process of developing and calibrating a large-scale microscopic model of Chittenden County, Vt., an area of about . The model was developed primarily using readily available data to which most metropolitan planning organizations are expected to have access. Following a brief description of how the network was coded and the traffic demand specified, the paper discusses the process of error checking and model calibration. Preliminary calibration results are encouraging, given the complexity of the model. The paper includes a summary of the main lessons learned and modeling pitfalls that should be avoided.
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Acknowledgments
Support for this research has been provided by the National Science Foundation (NSF) under Grant No. NSFCMS-0133386. The writers would like to thank NSF for their support. They would also like to thank Garrett Sabourin and Robert Fliegel for their help collecting field data and in modeling analysis.
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© 2008 ASCE.
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Received: Jul 25, 2006
Accepted: Dec 26, 2007
Published online: Jul 1, 2008
Published in print: Jul 2008
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