Improvement and Evaluation of Cell-Transmission Model for Operational Analysis of Traffic Networks: Freeway Case Study

The cell-transmission model (CTM), developed by Daganzo in 1994, has not been fully exploited as an operations model for analysis of largescale traffic networks. Because of its macroscopic and mesoscopic features, CTM offers calibration and computational advantages over microscopic models. This pape...

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Bibliographic Details
Published in:Transportation research record 2006-01, Vol.1965 (1965), p.171-182
Main Authors: Ishak, Sherif, Alecsandru, Ciprian, Seedah, Dan
Format: Article
Language:English
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Summary:The cell-transmission model (CTM), developed by Daganzo in 1994, has not been fully exploited as an operations model for analysis of largescale traffic networks. Because of its macroscopic and mesoscopic features, CTM offers calibration and computational advantages over microscopic models. This paper demonstrates specific improvements to the original form of CTM to increase its accuracy and realism of traffic flow representation. These improvements include modifications to provide flexibility in selection of cell lengths, noninteger movements of vehicles between cells, and algorithmic enhancements in the merging and diverging logics. The effect of such improvements on the performance of CTM was evaluated independently and comparatively. A sample freeway network of the I-10 corridor in Baton Rouge, Louisiana, was used to evaluate and compare the performance of the improved version of CTM versus CORSIM under heavily congested traffic conditions. The results showed comparable performance of both platforms in terms of link occupancy (density) and total network travel time.
ISSN:0361-1981
DOI:10.3141/1965-18