The Pollution-Routing Problem |
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| Authors: | Tolga Bekta? Gilbert Laporte |
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| Institution: | aSchool of Management and Centre for Operational Research, Management Science and Information Systems (CORMSIS), University of Southampton, Southampton, Highfield SO17 1BJ, United Kingdom;bCanada Research Chair in Distribution Management and Interuniversity Research Centre on Enterprise Networks, Logistics, and Transportation (CIRRELT), HEC Montréal, 3000 chemin de la Côte-Sainte-Catherine, Montréal, Canada H3T 2A7 |
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| Abstract: | The amount of pollution emitted by a vehicle depends on its load and speed, among other factors. This paper presents the Pollution-Routing Problem (PRP), an extension of the classical Vehicle Routing Problem (VRP) with a broader and more comprehensive objective function that accounts not just for the travel distance, but also for the amount of greenhouse emissions, fuel, travel times and their costs. Mathematical models are described for the PRP with or without time windows and computational experiments are performed on realistic instances. The paper sheds light on the tradeoffs between various parameters such as vehicle load, speed and total cost, and offers insight on economies of ‘environmental-friendly’ vehicle routing. The results suggest that, contrary to the VRP, the PRP is significantly more difficult to solve to optimality but has the potential of yielding savings in total cost. |
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| Keywords: | Vehicle routing Time windows Greenhouse gas emissions Energy consumption |
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