Article (Scientific journals)
A TWO-STEP APPROACH FOR THE CORRECTION OF THE SEED MATRIX IN THE DYNAMIC DEMAND ESTIMATION
Cantelmo, Guido; Viti, Francesco; Tampère, Chris M.J. et al.
2014In Transportation Research Record: Journal of the Transportation Research Board, 2466
Peer reviewed
 

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Abstract :
[en] In this work deterministic and stochastic optimization methods are tested for solving the Dynamic Demand Estimation problem. All the adopted methods demonstrate the difficulty in reproducing the correct traffic regime, especially if the seed matrix is not sufficiently close to the real one. Therefore, in this paper a new and intuitive procedure to specify an opportune starting seed matrix is proposed: it is a two-step procedure based on the concept of dividing the problem into small-size problems, focusing on specific OD pairs in different steps. Specifically, the first step focuses on the optimization of a subset of OD variables (the ones who generate the higher flows or the ones who generate the bottlenecks on the network). In the second step the optimization works on all the OD pairs, using as starting matrix the matrix derived from the first step. In this way is possible to use a more performance optimization method for every step, improving the performance of the method and the quality of the result with respect to the classical “one-step” approach. The procedure has been tested on the real network of Antwerp, Belgium, demonstrating its efficacy in combination with different optimization methods.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Cantelmo, Guido ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Viti, Francesco  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Tampère, Chris M.J.
Cipriani, Ernesto
Nigro, Marialisa
External co-authors :
yes
Language :
English
Title :
A TWO-STEP APPROACH FOR THE CORRECTION OF THE SEED MATRIX IN THE DYNAMIC DEMAND ESTIMATION
Publication date :
10 February 2014
Journal title :
Transportation Research Record: Journal of the Transportation Research Board
ISSN :
2169-4052
Publisher :
National Research Council, National Academy of Sciences. Commission on Sociotechnical Systems. Transportation Research Board, Washington, United States - District of Columbia
Volume :
2466
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 14 June 2014

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