摘要: |
Changing urban land use, demographics, and consumer behaviors continue to alter the challenge of providing �last-mile� freight services in already active and densely trafficked metro settings. As a response, freight carriers are exploring the use of nontraditional freight vehicles such as cargo cycles or light electric vehicles (LEVs). Both the operating characteristics and infrastructure requirements of these alternative vehicles vary considerably from the motor vehicles typically used in urban freight service. Thus, planners and policy-makers face two inherently interconnected questions: (1) How do urban environmental characteristics influence fleet mix decisions? and (2) How do individual firms� cost-driven fleet mix decisions impact urban system performance? Investigation into the role of public policy to promote LEV usage, ensure safety, provide adequate facilities for larger LEVs, include LEVs in urban freight planning, and provide incentives for using LEVs as an alternate to replace heavier trucks is required. Feasibility studies are also critical in order to determine the optimum land use, roadway design, density, and consumer demand requirements for different urban freight delivery models, including studying the scenarios that are best for traditional delivery vehicles and which are best for LEVs. |