Journal
NINTH INTERNATIONAL CONFERENCE ON CITY LOGISTICS
Volume 12, Issue -, Pages 227-238Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.trpro.2016.02.061
Keywords
Single-Tier Freight Distribution Systems; Two-Echelon Vehicle Routing Problems; Column Generation; Heuristic Algorithms
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We study a new routing problem arising in City Logistics. Given a ring connecting a set of urban distribution centers (UDCs) in the outskirts of a city, the problem consists in delivering goods from virtual gates located outside the city to the customers inside of it. Goods are transported from a gate to a UDC, then either go to another UDC before being delivered to customers or are directly shipped from the first UDC. The reverse process occurs for pick-up. Routes are performed by electric vans and may be open. The objective is to find a set of routes that visit each customer and to determine ring and gates-UDC flows so that the total transportation and routing cost is minimized. We solve this problem using a column generation-based heuristic, which is tested over a set of benchmark instances issued from a more strategic location-routing problem. (C) 2016 The Authors. Published by Elsevier B.V.
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