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Erschienen in: Transportation in Developing Economies 2/2016

01.10.2016 | Original Article

Transportation Investment Decision Making for Medium to Large Transportation Networks

verfasst von: Sabyasachee Mishra, Amit Kumar, Mihalis M. Golias, Timothy Welch, Hossein Taghizad, Khademul Haque

Erschienen in: Transportation in Developing Economies | Ausgabe 2/2016

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Abstract

One of the challenges for transportation decision makers is to identify capacity expansion in the network under the constraint of budget such that various objectives of the decision maker [such as total system travel time is minimized, social welfare (consumer surplus) is maximized, or total system emission is minimized], while accounting for the route choice behavior of users. Such type of investment decision making in the context of network design problems can be solved using optimization techniques. This type of optimization problem is particularly difficult to solve since two hierarchical decision making entities are involved (decision makers and road users). These two players have different objectives. The road users select routes such that their individual travel costs are minimized while the decision makers’ optimally seek to select capacity expansion projects in the network in such a way that planning objectives are achieved. The objective of this paper is to propose numerical methods and application algorithms such that optimal investment decisions are made in moderate and large transportation networks. The problem is formulated as a bi-level network design problem in which upper level determines the optimal capacity expansions of links and the lower level consist of the traditional Wardrop’s user equilibrium. The upper level provides a trial capacity expansion vector with additional network capacities. The lower level considers new link capacities for user equilibrium. The output from the lower level is a vector of link flows which is transferred to the upper level. This process is iterated using kth best algorithm till convergence. The upper level problem is solved using PSWARM algorithm and the solution for the lower level is obtained using an efficient static traffic assignment algorithm. Adequacy of the model is examined by first conducting numerical experiments using small networks from the literature and then using moderate to large scale networks. Results of numerical experiments indicates that proposed methodology from this study can be efficiently used for real-world applications in practice for transportation infrastructure capacity expansion decision making.

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Metadaten
Titel
Transportation Investment Decision Making for Medium to Large Transportation Networks
verfasst von
Sabyasachee Mishra
Amit Kumar
Mihalis M. Golias
Timothy Welch
Hossein Taghizad
Khademul Haque
Publikationsdatum
01.10.2016
Verlag
Springer International Publishing
Erschienen in
Transportation in Developing Economies / Ausgabe 2/2016
Print ISSN: 2199-9287
Elektronische ISSN: 2199-9295
DOI
https://doi.org/10.1007/s40890-016-0023-8

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