A Novel Methodology to Assimilate Sub-Path Flows in Bi-Level OD Matrix Estimation Process
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Description
Traditional bi-level origin-destination (OD) matrix estimation process adjusts the matrix (at the upper level) based on the deviation between the observed and simulated traffic counts. The problem is mathematically under-determined, and the quality of the solution can be enhanced by restricting the upper level search space with information from other sources. This paper presents a methodology that assimilates sub-path flows in the upper level objective function. The contributions of the study are two-fold: first, it proposes the idea of structural comparison of sub-path flows'' to relax the requirement of
known'' penetration rate of vehicles' trajectories; second, it proposes an innovative upper level formulation where the structural difference between the observed and assigned sub-path flows is integrated with the traditional deviations between the observed and assigned link flows. The sub-path flows can be estimated from advanced data sources such as Bluetooth MAC scanner. The proposed methodology is tested using simulation on a realistic network from Brisbane, Australia and results indicate its practical relevance for situations when the penetration rate of Bluetooth trajectories is generally unknown. The proposed method has a better ability to maintain structural consistency and showed considerable improvements in the quality of OD estimates as compared to the traditional traffic counts-based approach.
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ID Code: | 202802 | ||||
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Item Type: | Contribution to Journal (Journal Article) | ||||
Refereed: | Yes | ||||
ORCID iD: |
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Measurements or Duration: | 11 pages | ||||
Keywords: | OD matrix estimation, Bi-level Optimization, Bluetooth, sub-path flows, gradient descent, OD structure, Brisbane | ||||
DOI: | 10.1109/TITS.2020.2998475 | ||||
ISSN: | 1558-0016 | ||||
Pure ID: | 62957057 | ||||
Divisions: | Current > Research Centres > Centre for Data Science Current > Research Centres > Centre for Future Mobility/CARRSQ Past > Institutes > Institute for Future Environments Current > QUT Faculties and Divisions > Faculty of Science Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Civil & Environmental Engineering Current > QUT Faculties and Divisions > Faculty of Health Current > Research Centres > Centre for Tropical Crops and Biocommodities |
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Copyright Owner: | 2020 IEEE | ||||
Copyright Statement: | 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | ||||
Deposited On: | 02 Aug 2020 04:35 | ||||
Last Modified: | 19 May 2024 19:34 |
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