Print Email Facebook Twitter An exact optimization method for coordinating the arrival times of urban rail lines at a common corridor Title An exact optimization method for coordinating the arrival times of urban rail lines at a common corridor Author Gkiotsalitis, K. (University of Twente) Cats, O. (TU Delft Transport and Planning) Liu, T. (Southwest Jiaotong University) Bult, J. M. (University of Twente) Date 2023 Abstract The trips of a high-frequency urban rail line are typically planned with the aim of achieving even time headways. This results in reliable services for each urban rail line, where successive trips have the same time headway. Maintaining even time headways for each service line has significant advantages for the passengers of the line, but it might result in safety issues, vehicle bunching, and increased transfer times at a common corridor served by multiple urban rail lines. This study investigates the problem of urban rail corridor coordination and develops an exact optimization method for coordinating the vehicle trips of different lines that serve stations along a joint corridor. The proposed formulation is a non-convex mathematical program which is reformulated as a mixed-integer quadratic program with a convex objective function. A branch-and-bound algorithm coupled with the Active-set method is proposed for solving the model to global optimality. Results from a toy network and a case study of the light rail service in The Hague, The Netherlands, demonstrate the improvement potential of time headways at a common corridor, while accounting for the effect on the variation of time headways at isolated segments of the individual service lines. Subject Convex optimizationCoordinationSchedulingTrain corridor To reference this document use: http://resolver.tudelft.nl/uuid:dfd71d78-344e-4833-bb7a-78581443965a DOI https://doi.org/10.1016/j.tre.2023.103265 ISSN 1366-5545 Source Transportation Research. Part E: Logistics and Transportation Review, 178 Part of collection Institutional Repository Document type journal article Rights © 2023 K. Gkiotsalitis, O. Cats, T. Liu, J. M. Bult Files PDF 1_s2.0_S1366554523002533_main.pdf 2.04 MB Close viewer /islandora/object/uuid:dfd71d78-344e-4833-bb7a-78581443965a/datastream/OBJ/view