tailieunhanh - New trends on urban goods movement: modelling and simulation of e-commerce distribution

Most agricultural commodities are processed in some way. Some fruits and vegetables are canned, dried or frozen. Meat animals are slaughtered, cut up, and chilled. Wheat is ground, and the flour is baked into bread. Soybeans are crushed, and the oil is made into margarine and shortening; the meal is used for livestock feed or refined for high-protein flour. Cotton is spun into thread and yarn; the yarn goes into cloth, and the cloth into shirts and dresses and sheets. Byproducts of many agricultural products yield glycerin, fatty acids, enzymes, hormones, and many. | European Transport Trasporti Europei 2012 Issue 50 Paper N 6 ISSN 1825-3997 New trends on urban goods movement modelling and simulation of e-commerce distribution Jesus Gonzalez Feliu 1 Christian Ambrosini2 Jean-Louis Routhier2 1 Laboratoire d Economie des Transports CNRS France 2Laboratoire d Economie des Transports Université Lumière Lyon 2 France Abstract In this paper a modelling framework to complete the recent scientific works on urban goods modelling is proposed. More precisely we introduce a substitution procedure that estimates the number of trips and the corresponding travelled distances for shopping drive home delivery and reception points strategies. Moreover an appraisal of scenarios is proposed in order to study how these three new forms of proximity delivery services impact on the overall urban goods movement distribution. Starting from four extreme situations we introduce more realistic scenarios in order to find a suitable combination of delivery strategies. All the scenarios are simulated using the proposed framework and the main traffic issues related to e-commerce distribution channel are discussed. The best realistic combination promotes the joint usage of home deliveries and proximity reception points and allows a reduction of about 13 of the road occupancy rates in urban areas. Keywords urban goods movement modelling shopping trips e-commerce. Introduction In the last decades city logistics has been developed to deal with the main problems of urban freight distribution studying freight movements in urban areas and proposing solutions to reduce congestion and pollution as main problematics Crainic 2008 Danielis et al. 2010 . Recent studies have defined and characterised the different movements of urban goods Patier 2002 Ségalou et al. 2004 Russo and Comi 2006 . Two main approaches have been proposed for urban freight modelling in classical modelling approaches these movements are related to a quantity of goods Sonntag 1985 Ortuzar and .