Schedule Consistency for Daily Activity Chains in Integrated Activity-Based Dynamic Multimodal Network Assignment
| Autor: | Omer Verbas, Xiang Alex Xu, Ali Zockaie, James E Hicks, Michael Hyland, Peter Vovsha, Hooram Halat, Hani S. Mahmassani |
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| Rok vydání: | 2017 |
| Předmět: |
050210 logistics & transportation
Schedule Mathematical optimization 021103 operations research Heuristic (computer science) Mechanical Engineering 05 social sciences 0211 other engineering and technologies 02 engineering and technology Travel time Travel behavior Consistency (database systems) 0502 economics and business Convergence (routing) Economics Linear optimization problem Assignment problem Simulation Civil and Structural Engineering |
| Zdroj: | Transportation Research Record: Journal of the Transportation Research Board. 2664:11-22 |
| ISSN: | 2169-4052 0361-1981 |
| DOI: | 10.3141/2664-02 |
| Popis: | The dynamic multimodal network assignment problem at the daily schedule level is addressed by integrating an activity-based model and a dynamic traffic assignment tool through a unified framework. The framework achieves this integration while retaining disaggregated individualized information. The problem is formulated as a fixed-point problem, and equilibrium is achieved by minimizing the gap between the expected travel time, which is used by the activity-based model to generate the travelers’ individual and household activity schedules, and their experienced travel times, simulated by the dynamic traffic assignment tool. The schedule adjustment problem for individuals and households is formulated as a linear optimization problem. Two measures—inconsistent-schedule penalty and number of households with unrealistic schedules—are defined to monitor the status of the equilibrium and convergence gap of the integrated system. To ensure convergence of the applied integration, heuristic strategies for selecting individuals for schedule adjustment and path swap are tested in a subarea network of Chicago, Illinois. Selecting individuals for schedule adjustment based on their inconsistent-schedule penalty reduces both defined measures significantly and leads to the convergence of the planned schedule and the experienced (i.e., simulated) schedule. |
| Databáze: | OpenAIRE |
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