Service Network Design Models for Two-Tier City Logistics

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This paper focuses on two-tier City Logistics systems for advanced management of urban freight activities and, in particular, on the first layer of such systems where freight is moved from distributions centers on the outskirts of the city to satellite platforms' by urban vehicles, from where it will be distributed to customers by other, dedicated vehicles. The paper addresses the issue of planning the services of this first tier system, that is, select services, their routes and schedules, and determine the itineraries of the customer-demand flows through these facilities and services. The paper proposes a general scheduled service network design modeling framework that captures the fundamental concepts related to the definition of urban-vehicle tactical plans within a two-tier distribution network.