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Jul 2, 2019
A Trajectory-Mining Approach to Derive Travel Time Skim Matrix in Dynamic Traffic Assignment
Authors: Ye Tian [email protected], Yi-Chang Chiu, and Jian SunAuthor Affiliations
Publication: CICTP 2019
Abstract
The travel impedance skim matrix is one of the essential intermediate products within transportation forecasting models. It reflects interzonal travel costs and is explicitly utilized in trip distribution and mode choice models. The traditional method of obtaining skim matrices is to execute multiple iterations of all-to-one or one-to-one time dependent shortest path algorithms. However, the computational and memory usage limits can be easily reached when dealing with mega-scale networks such as those with thousands of zones. This paper proposes two new ideas of extracting the interzonal travel impedance information from the already existing vehicle trajectories. The numerical experiments highlight huge potential advantages of the proposed approaches in terms of saving both memory and CPU time.
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© 2019 American Society of Civil Engineers.
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Published online: Jul 2, 2019
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Dept. of Traffic Engineering, Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji Univ., Shanghai 201804, China. E-mail: [email protected]
Yi-Chang Chiu
Univ. of Arizona, Tucson, AZ 85721.
Jian Sun
Dept. of Traffic Engineering, Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji Univ., Shanghai 201804, China.
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