Title | DTA2012 Symposium: Combining disaggregate route choice estimation with aggregate calibration of a dynamic traffic assignment model |
Publication Type | Journal Article |
Year of Publication | 2015 |
Authors | Ben-Akiva ME, Gao S, Lu L, Wen Y |
Journal | Networks and Spatial Economics |
Volume | 15 |
Issue | 3 |
Start Page | 559 |
Pagination | 559–581 |
Date Published | 09/2015 |
ISSN | 1566-113X |
Keywords | Calibration, Dynamic traffic assignment, Route choice model estimation |
Abstract | Dynamic Traffic Assignment (DTA) models are important decision support tools for transportation planning and real-time traffic management. One of the biggest obstacles of applying DTA in large-scale networks is the calibration of model parameters, which is essential for the realistic replication of the traffic condition. This paper proposes a methodology for the simultaneous demand-supply DTA calibration based on both aggregate measurements and disaggregate route choice observations to improve the calibration accuracy. The calibration problem is formulated as a bi-level constrained optimization problem and an iterative solution algorithm is proposed. A case study in a highly congested urban area of Beijing using DynaMIT-P is conducted and the combined calibration method improves the fits to surveillance data compared to the calibration based on aggregate measurements only. |
DOI | 10.1007/s11067-014-9232-z |