632 research outputs found

    Retail Precinct Management: A Case of Commercial Decentralization in Singapore

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    AbstractThis paper reviews the logistics challenges of a decentralization strategy in Singapore. The main purpose of an urban decentralization, where the commercial hubs and retail clusters are distributed in several regional centers is to relieve congestion from the city center and to move business closer to home. However, this approach can also create congestion in regional centers due to the rapid flow of public, private and freight vehicles in and out of regional centers. This paper identifies three major challenges and proposes Retail Precinct Management (RPM) which consists of four inter-related components to overcome these challenges

    auction with rolling horizon for urban consolidation centre

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    Collaborative urban transportation : Recent advances in theory and practice

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    We thank the Leibniz Association for sponsoring the Dagstuhl Seminar 16091, at which the work presented here was initiated. We also thank Leena Suhl for her comments on an early version of this work. Finally, we thank the anonymous reviewers for the constructive comments.Peer reviewedPostprin

    Enabling the freight traffic controller for collaborative multi-drop urban logistics: practical and theoretical challenges

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    There is increasing interest in how horizontal collaboration between parcel carriers might help alleviate problems associated with last-mile logistics in congested urban centers. Through a detailed review of the literature on parcel logistics pertaining to collaboration, along with practical insights from carriers operating in the United Kingdom, this paper examines the challenges that will be faced in optimizing multicarrier, multidrop collection, and delivery schedules. A “freight traffic controller” (FTC) concept is proposed. The FTC would be a trusted third party, assigned to equitably manage the work allocation between collaborating carriers and the passage of vehicles over the last mile when joint benefits to the parties could be achieved. Creating this FTC concept required a combinatorial optimization approach for evaluation of the many combinations of hub locations, network configuration, and routing options for vehicle or walking to find the true value of each potential collaboration. At the same time, the traffic, social, and environmental impacts of these activities had to be considered. Cooperative game theory is a way to investigate the formation of collaborations (or coalitions), and the analysis used in this study identified a significant shortfall in current applications of this theory to last-mile parcel logistics. Application of theory to urban freight logistics has, thus far, failed to account for critical concerns including (a) the mismatch of vehicle parking locations relative to actual delivery addresses; (b) the combination of deliveries with collections, requests for the latter often being received in real time during the round; and (c) the variability in travel times and route options attributable to traffic and road network conditions

    Development of a New Concept Electric Vehicle for Last Mile Transportations

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    Within European cities, where 68% of the EU population lives using 70% of the energy, an integrated and sustainable urban approach is needed. In order to meet the increasingly complex challenges of urban areas new, efficient, and user-friendly technologies and services, in particular in areas of energy, transport, and ICT are required. In the transport sector electric urban mobility and synergy between different transport systems (ITS) and infrastructures must be supported strongly in order to improve life conditions of citizens in terms of i) emissions, ii) services, iii) traffic congestion (an ambitious challenge is reduction of journey times). With the aim of improving the city logistic more efficient peopletransport and freight-distribution systems have to be used, so electro-mobility for transport in the “last mile” must be supported. In the i-NEXT (Innovation for greeN Energy and eXchange in Transportation) project, in which CNR ITAE is directly involved as coordinator, activities are addressed to implementation of new concept modular electric vehicles having different upper-bodies able to be used both for people (public transport) and freight in urban areas. The project aims to develop a not commercial vehicle characterized by new design in which the challenge is to reach the lowest ratio between total weight and load capacity (europallet for freight and seats for people). Other important aspects are to define specific mission of use, range of autonomy, recharge times and cost in terms of batteries and recharge systems technologies. In conclusion synergy of electro-mobility with renewable energy plants and smart grids is essential for sustainability of smart city concept. Document type: Articl
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