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- Title
DTA2012 Symposium: Combining Disaggregate Route Choice Estimation with Aggregate Calibration of a Dynamic Traffic Assignment Model.
- Authors
Ben-Akiva, Moshe; Gao, Song; Lu, Lu; Wen, Yang
- 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.
- Subjects
TRAFFIC assignment; ROUTE choice; ESTIMATION theory; TRANSPORTATION planning; TRANSPORTATION management; ITERATIVE methods (Mathematics)
- Publication
Networks & Spatial Economics, 2015, Vol 15, Issue 3, p559
- ISSN
1566-113X
- Publication type
Academic Journal
- DOI
10.1007/s11067-014-9232-z