Highlights The two-echelon time-constrained VRP in linehaul-delivery systems is introduced. A mixed integer programming model for the 2E-TVRP is put forward. A heuristic involving savings-based algorithm and local search phase is provided. The heuristic can effectively solve various instances.

    Abstract Most of the studies address issues relating to the delivery from satellites to customers, which is throughout the end part of the linehaul-delivery system. Differing from the long-term strategic problems including the two-echelon vehicle routing problem (2E-VRP), the two-echelon location routing problem (2E-LRP) and the truck and trailer routing problem (TTRP) which make location decisions in depots or satellites, the paper introduces a short-term tactical problem named the two-echelon time-constrained vehicle routing problem in linehaul-delivery systems (2E-TVRP) that does not involve location decisions. The linehaul level and the delivery level are linked through city distribution centers (CDCs) located on the outskirts of cities. The 2E-TVRP has inter-CDC linehaul on the first level and urban delivery from CDCs to satellites on the second level. Vehicle routes on different levels are interacted by time constraints. A mixed integer nonlinear programming model for the 2E-TVRP is put forward, and a mixed integer linear programming model is used as the benchmark model. The Clarke and Wright savings heuristic algorithm (CW) improved by a local search phase is adopted. The 2E-TVRP formulations and the heuristic algorithm are tested by using 140 randomly-generated instances with up to 10 CDCs and 500 satellites. The computational results indicate that the heuristic can effectively solve various instances of the 2E-TVRP.


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    Titel :

    The two-echelon time-constrained vehicle routing problem in linehaul-delivery systems


    Beteiligte:
    Li, Hongqi (Autor:in) / Zhang, Lu (Autor:in) / Lv, Tan (Autor:in) / Chang, Xinyu (Autor:in)


    Erscheinungsdatum :

    2016-01-01


    Format / Umfang :

    20 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch