Decision Support System for Intermodal Freight Transportation Planning: An Integrated View on Transport Emissions, Cost
The evaluation and selection of intermodal routes with regard to the key objectives, i.e., transit time, transport emissions and cost, is the main challenge in the design of intermodal networks. The aim of this paper is to present a decision support syste
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Abstract The evaluation and selection of intermodal routes with regard to the key objectives, i.e., transit time, transport emissions and cost, is the main challenge in the design of intermodal networks. The aim of this paper is to present a decision support system for intermodal freight transportation planning, which offers methodological contributions to the research on transport mode, route and carrier selection as well as results for industrial practitioners for the assessment of emission abatement potentials. Core of this approach is a capacitated multi-commodity network flow model considering three minimization objectives, i.e. costs, time and CO2 -equivalents. In this contribution a tri-objective mixed-integer linear model formulation minimizes the number of transported and transshipped full truck loads taking into account tied in-transit capital and the distance travelled. The decision support system is validated in an exemplary case study application analyzing the sensitivity of objectives on optimal route and carrier choice. By applying the augmented ε-constraint method, a Pareto-efficient frontier is determined to investigate the tradeoff between economic and ecological objectives in intermodal freight transportation planning.
1 Introduction With the growing demand for freight transportation, the amount of released air emissions from transport increases [6]. To mitigate climate relevant air emissions from freight transportation, policy-makers stimulate the application of intermodal freight transport chains [9]. The common flexible but environmentally less favorable road transport by truck can be combined with the more environmentally friendly transportation by rail and sea [4]. The evaluation and selection of intermodal routes conA. Rudi (B) · M. Froehling · K. Zimmer · F. Schultmann Karlsruhe Institute of Technology (KIT), Institute for Industrial Production (IIP), Hertzstr. 16, 76187 Karlsruhe, Germany e-mail: [email protected] © Springer International Publishing Switzerland 2017 K.F. Dörner et al. (eds.), Operations Research Proceedings 2015, Operations Research Proceedings, DOI 10.1007/978-3-319-42902-1_94
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sidering the often conflicting key objectives, i.e., greenhouse gas (GHG) emission, transportation cost and time, is crucial in the design of intermodal networks [2]. Therefore, the aim of this paper is to provide support for decision makers in industry concerning route and carrier choice in transport service design and the assessment of emission abatement potentials with respect to economic and ecological objectives.
2 Tri-Objective Model Formulation The following generic tri-objective model formulation is based on the capacitated multi-commodity network flow model (CMCNF) formulated by Rudi et al. [8]. The authors frame a single objective mixed-integer linear problem considering multiple criteria, i.e., CO2 -equivalents, cost and time, as well as in-transit holding costs. By introducing criteria weightings and applying the weighted sum scalarization method, a line
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