Variable Neighborhood Search for the Pickup and Delivery Traveling Salesman Problem with LIFO Loading

  • Authors:
  • Francesco Carrabs;Jean-François Cordeau;Gilbert Laporte

  • Affiliations:
  • Dipartimento di Matematica ed Informatica, Università di Salerno, 84084 Fisciano (SA), Italy;Center for Research on Transportation, HEC Montréal, Montréal, Québec H3T 2A7, Canada;Center for Research on Transportation, HEC Montréal, Montréal, Québec H3T 2A7, Canada

  • Venue:
  • INFORMS Journal on Computing
  • Year:
  • 2007

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Abstract

This paper addresses a variation of the traveling salesman problem with pickup and delivery in which loading and unloading operations have to be executed in a last-in-first-out (LIFO) order. We introduce three new local search operators for this problem, which are then embedded within a variable neighborhood search heuristic. We evaluate the performance of the heuristic on data adapted from TSPLIB instances.