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Sustainability 2017, 9(5), 776; doi:10.3390/su9050776

A Lagrangian Relaxation-Based Solution Method for a Green Vehicle Routing Problem to Minimize Greenhouse Gas Emissions

Department of Industrial Engineering, Pusan National University, Busan 46241, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Ilkyeong Moon
Received: 11 December 2016 / Revised: 21 April 2017 / Accepted: 24 April 2017 / Published: 8 May 2017
(This article belongs to the Special Issue Sustainability in Supply Chain Management)
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Abstract

The effects of greenhouse gas (GHG) on the weather has caused ever-increasing disasters around the world. Many countries are making significant efforts to reduce GHG emissions in all industrial sectors. In this study, a green vehicle routing problem (GVRP) has been formulated as a nonlinear integer programming problem to minimize GHG emissions, considering various realistic factors that include three-dimensional customer locations, gravity, vehicle speed, vehicle operating time, vehicle capacity, rolling resistance, air density, road grade and inertia. Lagrangian relaxation has been introduced to propose a simple solution method. In contrast to traditional vehicle routing problems, the vehicle speed, vehicle weight, and road grade between two customer locations are also determined along with vehicle routes. The computational results demonstrate the effectiveness and efficiency of the proposed solution method. View Full-Text
Keywords: vehicle routing; greenhouse gas emissions; Lagrangian relaxation vehicle routing; greenhouse gas emissions; Lagrangian relaxation
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Zhou, Y.; Lee, G.M. A Lagrangian Relaxation-Based Solution Method for a Green Vehicle Routing Problem to Minimize Greenhouse Gas Emissions. Sustainability 2017, 9, 776.

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