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981.
982.
Herbert Mohring 《Transportation》1993,20(3):267-283
Define a transportation improvement's impact zone as the area within which resident households and business firms regularly utilize the improvement. Three simple parables suggest that the increases in impact-zone land rents that usually accompany improvements do not accurately reflect its benefits. Seemingly modest variations in the demand and supply relationships that characterize impact-zone residents can have major effects on the relationship between benefits received and the land-rent changes that are measured. Generally speaking, increases in impact-zone land rents substantially understate benefits unless these benefits are small either absolutely (because the improvement is modest) or relatively (because the impact zone is part of a homogeneous area of much larger size). 相似文献
983.
Jacques Lonardi Michael Baumgartner 《Transportation Research Part D: Transport and Environment》2004,9(6):766
Road freight transport continues to grow in Germany and generates 6% of the country’s CO2 emissions. In logistics, many decisions influence the energy efficiency of trucks, but causalities are not well understood. Little work has been done on quantifying the potential for further CO2 reduction and the effect of specific activities, such as introducing computer assisted scheduling systems to trucking firms. A survey was survey out and linked fuel consumption to transport performance parameters in 50 German haulage companies during 2003. Emission efficiency ranged from 0.8 tonne-km to 26 tonne-km for 1 kg CO2 emissions. The results show potential for improvements given a low level of vehicle usage and load factor levels, scarce use of lightweight vehicle design, poorly selected vehicles and a high proportion of empty runs. IT-based scheduling systems with telematic application for data communication, positioning and navigation show positive effects on efficiency. Fuel use and transport performance was measured before and after the introduction of these systems. 相似文献
984.
985.
The heightening of issues, such as sustainable development and environmental pollution have resulted in many governments pursuing transport policies which aim to promote the use of public transport modes, including walking, as well as discourage the use of the car for various activities, such as shopping, work, recreation, etc. However, little has been done on understanding shoppers' perceptions of transport modes for shopping purposes. Particularly, not much research has been done on examining the attitudes of car owners and non-car owners towards transport modes for shopping purposes. Using Singapore as a study area, this study has attempted to analyse car owners and non-car owners' perceptions of the different types of transport modes (i.e., car, taxi, bus, mass rapid transit and walk) in their shopping trips. The research found that each transport mode has its own unique set of attributes. In addition, car owners and non-car owners portray different attitudes towards the public transport modes and the car. This calls for different strategies for these two groups of shoppers in encouraging them to use the public transport modes and restrain the use of the car. 相似文献
986.
杨青山 《筑路机械与施工机械化》2003,20(5):50-51,54
通过对筑路机械设备招标采购必要性、重要性的理论探索和招标工作的实践摸索,对招标程序和招标中应注意的问题作出了认真分析和探讨,并对公平、公正、公开地搞好设备招标工作提出了建议。 相似文献
987.
分析了垦区道路运输的现状及未来发展目标 ,指出要保证其可持续快速发展 ,必须进行运输结构调整 ,加强基础设施建设 ,并依靠科技进步 相似文献
988.
理解公共政策:"政策网络"的途径 总被引:2,自引:0,他引:2
“政策网络”突破了传统政策分析范式,形成了新的理论和方法,逐渐成为政治学和政策分析领域的主流话语和研究途径。政策网络是政策过程中相互依赖的国家与社会行动者之间不同互动关系模式的总称,网络结构是这一理论的研究假设并成为政策网络的基本分析单位,由关系模式所形成的网络类型则是政策网络的主要分析内容。尽管政策网络理论并非无懈可击,但它所形成的中观分析途径对于理解公共政策以及国家与社会关系具有重要的理论价值和现实意义。 相似文献
989.
990.
�������˻ύͨ���м�����ʾ 总被引:4,自引:0,他引:4
奥运会交通筹备和运行工作是十分复杂的系统工程。前期需要做好奥运会交通需求分析、交通设施、交通组织管理的规划和设计工作,赛时需要考虑奥运会运行的特殊要求,组织安排好各客户群体的集散运输服务,同时协调好赛事交通和社会交通。本文分析了北京奥运会交通需求,从基础设施建设、运输服务及管理政策等方面介绍了北京奥运会交通筹备工作。从奥运指挥体系、场馆交通、道路交通、公共交通等方面阐述奥运会期间北京交通的运行状况。最后,结合北京交通发展,提出了奥运交通对北京今后交通发展的主要启示和奥运会后交通发展的思路。 相似文献