Improving paratransit scheduling using ruin and recreate methods |
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| Authors: | Carl H Häll Anders Peterson |
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| Institution: | 1. Department of Science and Technology (ITN) , Link?ping University , SE-60174 , Norrk?ping , Sweden carha@itn.liu.se;3. Department of Science and Technology (ITN) , Link?ping University , SE-60174 , Norrk?ping , Sweden |
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| Abstract: | Abstract In this paper we study the effects of using ruin and recreate methods in a replanning phase of a dynamic dial-a-ride problem. Several such methods are proposed, and a modeling system is used to evaluate how they improve the quality of the solutions. We show that simple changes to existing planning methods can increase the efficiency of the service. Two cases, with different forms of costs inflicted on the vehicles, are evaluated and significant improvements are found in both cases. The best results of our study are found with ruin methods based on removal of sequences of requests. |
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| Keywords: | optimization paratransit planning simulation |
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