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1.
《智能交通系统杂志
》2012,16(3):205-223
》2012,16(3):205-223
This paper summarizes the improvements in traffic operations at the Electronic Toll Collection plazas of the Orlando-Orange County Expressway Authority (OOCEA). Automatic Vehicle Identification (AVI) was installed on all lanes of ten OOCEA plazas, with one fully dedicated AVI lane at each plaza. The results indicate that the measured throughput of the dedicated AVI lane has increased by 154%. Significant improvements were observed at the dedicated AVI lane including a 194% potential increase in capacity, average savings of 5 seconds in service time per vehicle, a reduction of 1 minute in average queueing delay and 2.5 minutes in maximum queueing delay per vehicle, and average savings of 8.5 vehicle-hours in total queueing delay per peak hour. Also, variability in the inter-vehicle time has been significantly reduced in the dedicated AVI lane. Capacity, inter-vehicle time, and service times of the mixed lanes did not change significantly because of AVI. However, arrivals have shifted to the dedicated AVI lane thus reducing delays at the mixed lanes, and improving traffic operations for the entire toll plaza. 相似文献
2.
《智能交通系统杂志
》2012,16(4):287-331
》2012,16(4):287-331
It is expected that the Intelligent Transportation Systems (ITS) of the future will involve communication between vehicles and the roadside. In designing these communication systems it is imperative that one has a sound and detailed understanding of radio-wave propagation in both short-distance roadside and complicated urban environments. In this paper we discuss the type of propagation models that are needed for ITS designers to predict system performance. This paper has approached this problem by examining the radio-wave propagation in the roadway environment over the range of distances and at frequencies that will have the potential to meet the needs of ITS. The requirements of the individual functions of ITS were taken into consideration in addition to what portions of the radio frequency spectrum will be available. 相似文献
3.
以宁沪高速公路南京主线收费站数据为样本,使用现代时间序列模型预测收费道口交通流量,提出了基于交通流量预测的收费道口运营策略制定方法,并给出了应用实例。 相似文献
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重点探讨实际道路规划项目中一般收费道路的收费收入预测方法,目的在于尽可能使收费收入预测更为精确。在我国,高速公路通常采用依靠征收通行费以偿还投资借贷的方式进行建设,因此在规划的过程中需要对通行费收入进行预测,并进行财务分析,以保证决策者做出正确的投资决策。以笔者在日本从事的高速公路建设项目为例,分析研究了基于实用型交通量增量分配方法结合使用车种转换矩阵的高速公路路网中一般收费道路通行费收入的预测方法,并将其应用到实际道路项目财务评价中。结果表明通过控制收费道路出入口间交通量预测精度,以及采用需求相关性较大的车种转换调查数据可以提高通行费预测精度。研究表明这一方法具有很强的实用性,该方法对我国的高速公路需求预测有着借鉴作用。 相似文献
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主要介绍一种全新适用型公路电子收费系统。该系统针对目前我国公路收费系统现状及存在的问题,进行了相关改进,具有极大的推广意义。 相似文献
8.
This paper looks at the first and second best jointly optimal toll and road capacity investment problems from both policy
and technical oriented perspectives. On the technical side, the paper investigates the applicability of the constraint cutting
algorithm for solving the second best problem under elastic demand which is formulated as a bilevel programming problem. The
approach is shown to perform well despite several problems encountered by our previous work in Shepherd and Sumalee (Netw.
Spat. Econ., 4(2): 161–179, 2004). The paper then applies the algorithm to a small sized network to investigate the policy implications of the first and second
best cases. This policy analysis demonstrates that the joint first best structure is to invest in the most direct routes while
reducing capacities elsewhere. Whilst unrealistic this acts as a useful benchmark. The results also show that certain second
best policies can achieve a high proportion of the first best benefits while in general generating a revenue surplus. We also
show that unless costs of capacity are known to be low then second best tolls will be affected and so should be analysed in
conjunction with investments in the network.
Andrew Koh Prior to joining the Institute for Transport Studies in December 2005, Andrew was employed for number of years as a consultant in highway assignment modelling. He is an economist with wide ranging research interests in transport economics as well as evolutionary computation heuristics such as genetic algorithms, particle swarm optimisation and differential evolution. Simon Shepherd At the Institute for Transport Studies since 1989, he gained his doctorate in 1994 applying state-space methods to the problem of traffic responsive signal control in over-saturated conditions. His expertise lies in modelling and policy optimisation ranging from detailed simulation models through assignment to strategic land use transport models. Recently he has focussed on optimisation of road user charging schemes and is currently working on optimal cordon design and system dynamics approaches to strategic modelling. Agachai Sumalee Agachai is currently an Assistant Professor at Department of Civil and Structural Engineering, Hong Kong Polytechnic University (). He obtained a Ph.D degree with the thesis entitled “Optimal Road Pricing Scheme Design” at Leeds University in 2004. His research areas cover transport network modeling and optimization, stochastic network modeling, network reliability analysis, and road pricing. Agachai is currently an associate editor of Networks and Spatial Economics. 相似文献
Agachai SumaleeEmail: |
Andrew Koh Prior to joining the Institute for Transport Studies in December 2005, Andrew was employed for number of years as a consultant in highway assignment modelling. He is an economist with wide ranging research interests in transport economics as well as evolutionary computation heuristics such as genetic algorithms, particle swarm optimisation and differential evolution. Simon Shepherd At the Institute for Transport Studies since 1989, he gained his doctorate in 1994 applying state-space methods to the problem of traffic responsive signal control in over-saturated conditions. His expertise lies in modelling and policy optimisation ranging from detailed simulation models through assignment to strategic land use transport models. Recently he has focussed on optimisation of road user charging schemes and is currently working on optimal cordon design and system dynamics approaches to strategic modelling. Agachai Sumalee Agachai is currently an Assistant Professor at Department of Civil and Structural Engineering, Hong Kong Polytechnic University (). He obtained a Ph.D degree with the thesis entitled “Optimal Road Pricing Scheme Design” at Leeds University in 2004. His research areas cover transport network modeling and optimization, stochastic network modeling, network reliability analysis, and road pricing. Agachai is currently an associate editor of Networks and Spatial Economics. 相似文献
9.
运用经济杠杆长效治理超载超限运输 总被引:37,自引:3,他引:37
分析了经济利益贯穿的货主—运输业户—车辆生产、改装厂家的超载超限运输链条的成因、现状和危害;提出了要从以核定载质量为依据转而以货车实际总重和轴载限额为依据对货车实施计重收费的思路,通过区别对待,体现公平,分步推进,累积治理,实现运用经济杠杆,达到长效治理超载超限运输的目的;阐述了江苏、河南、青海等省份实行计重收费所产生的积极效果以及他们推广的安排;提出在计重收费方法以及低速动态轴载称重设备精度、可靠度和价格方面还需要进一步探讨。 相似文献
10.