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在简要介绍我国ITS体系框架开发的研究背景、概念、内容的基础上,针对我国ITS体系框架的开发方法、开发思路及开发步骤做出详细说明,旨在全面了解我国ITS的开发研究理念与过程,为今后ITS技术的实施奠定基础。 相似文献
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《智能交通系统杂志
》2012,16(3-4):187-207
》2012,16(3-4):187-207
Abstract Communication of information from the roadway infrastructure to vehicles is expected to enhance Automated Highway Systems (AHS) by supporting subsystem functions like vehicle motion control, multiple vehicle coordination, and vehicle navigation. A suitable communication channel is information coding in the lateral reference used for automatic steering and lane keeping control, e.g. in the magnet reference system used by California PATH (Partners for Advanced Transit and Highways). The presented coding strategy was designed for and tested at the 1–15 test track near San Diego, CA, being prepared for the AHS demonstration of the National AHS Consortium (NAHSC) held in Aug. 1997. A number of aspects are discussed, concerning types and structure of coded information, encoding and decoding schemes, and possible future extensions. 相似文献
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当前车辆自适应巡航系统响应速度慢,无法在高速巡航中兼顾通行效率与安全性。为提高车辆自适应巡航过程中的响应速度,让车辆巡航行驶时所需的控制信息能够在交通流中实时传递,将基于第五代移动通信技术的车载自组网融入到车辆自适应巡航系统之中,提出 一种基于第五代移动通信技术的协同自适应巡航系统及控制方法。该方法能够实时将车辆状 态信息通过通信同步至区域范围内的其它车辆,实现信息共享,获取超视距的路况信息。仿真实验表明,第五代移动通信技术的低延时高带宽及优秀的用户接入量支持特性,可以有效地应用于自适应巡航控制系统中,提升跟随车辆的响应速度,缩短跟车间距,达到通行效率 与安全性的有机结合。 相似文献
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介绍交通模式的定义及识别,结合实际项目构建了一种基于模式识别的自适应区域信号协调控制系统,给出了系统的结构及工作原理,讨论了交通模式识别过程中的若干关键问题。 相似文献
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《智能交通系统杂志
》2012,16(2):99-109
》2012,16(2):99-109
Many Intelligent Transportation Systems (ITS) applications require some form of location information. For example, traveler information services and traffic management are both critically dependent on the specification of location(s). Some ITS applications may need this information in finer resolution than others as demonstrated by the navigation and route guidance systems vs. severe weather warnings for a local area. A location can be a street address, a highway segment, an intersection, a stretch of roadway or a small geographical area. These types of locations can be coded in various ways. In this paper, we first examine several coding schemes reported in the literature and/or used in real applications. Then, we propose a new location coding scheme based on the first three digits of the Zipcode plus local information. This scheme uniquely represents all useful types of locations and is versatile and efficient. Moreover, it fits well the location reference message protocol (LRMP) described in [Goodwin et al., 1995; Goodwin and Xiong, 1994]. To demonstrate its utility and power, we compare the proposed scheme with the Road Name ID scheme [Ramakrishnan et al., 1994]. 相似文献
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《智能交通系统杂志
》2012,16(2):167-180
》2012,16(2):167-180
Abstract This paper documents the assessment of the information requirements for the development of an Integrated Transit/Traffic Management and Traveler Information System. The identification of information requirements represents one of several phases of the information gathering process which was necessary to evaluate the suitability of available technologies, IVHS elements, and architectures for the design of an operational test of the integration of transit and traffic management and traveler information system. The integration design includes the automated transfer of operations and management information between agencies and to the public in order to realize efficiencies in the transportation network. The paper details the information requirements of three public agencies involved in transportation management together with transportation information requirements of the traveling public. Availability of the required data is assessed and existing and potential data sources are identified. 相似文献
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本文阐述了利用奥地利AVL公司开发的Cruise(V3.0)软件进行纯电动汽车整车建模、制定仿真计算任务、运行计算并分析计算结果等的具体方法。着重介绍了Cruise、Matlab\Simulink联合仿真技术,从而将整车控制策略、电源管理策略、电机控制策略和制动回收策略应用到仿真技术中的过程和方法。 相似文献
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《智能交通系统杂志
》2012,16(3):225-259
》2012,16(3):225-259
This paper provides an attempt at evaluating the safety impacts of an Adaptive Cruise Control (ACC) system relative to Conventional Cruise Control (CCC) utilizing data that were gathered as part of a Field Operational Test (FOT) in Ann Arbor, Michigan. The safety of the ACC system is quantified considering three surrogate safety measures. The first safety measure considers the car-following behavior of an ACC system relative to manual driving in order to identify potential differences in driver/vehicle aggressiveness. The second safety measure considers changes in demands on driver resources associated with ACC technology. The third, and final safety measure, considers differences in the number of braking maneuvers and near encounters associated with ACC and CCC driving. These three surrogate safety measures are utilized to identify any potential hazards that could be associated with an ACC system. The three surrogate safety measures demonstrate consistency between ACC and manual car-following behavior, an increased usage of cruise control with adaptive features, reductions in driver manual resources and potential reductions in visual resources, and no differences in braking interventions and \"near encounters.\" These findings collectively suggest that the use of ACC does not appear to impose a safety hazard on transportation system. 相似文献
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Haruo Ozaki 《国际交通安全学会研究报告》2018,42(2):72-75
User-centric intelligent mobility businesses emerge and prosper in Asian metropolitan areas by utilizing the progress if information and communication technology (ICT). Under the rise of private lead initiatives on intelligent transport systems (ITS), the roles of public sectors are still large. Public sectors should precisely identify the extensive ITS services by considering the regional conditions and deploy them by collaboration between the public and private. Public sectors also are strongly encouraged to identify the benefits acquired by development and compliance of the international technical standards. Furthermore, in order to maximize the potential capacity of ICT, improvements of social infrastructures are required by the public sectors together with private businesses. With the realization of the collaboration works, Asian regions are well deserved to take the lead in future ITS initiatives. 相似文献
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基于无线定位技术的交通信息获取方法研究 总被引:2,自引:1,他引:1
基于无线定位技术的交通信息获取方法是一种应用前景良好的交通信息获取方法。在考虑该方法所涉及各方面问题的基础上,给出了一种适合我国混合交通状况的应用无线定位技术获取交通信息的方法。首先阐述了应用无线定位技术获取交通信息的工作原理及系统框架,进而通过实测获取处于通话状态的移动台在越区切换过程中的切换点数据,并分析切换点的分布特征。在该特征的基础上,应用PARAMICS软件构建仿真环境,设计仿真方案,进行仿真试验,以评价该方法的有效性和实用性。仿真试验的结果表明,基于无线定位技术的交通信息获取方法能够获取相当精度的交通信息。 相似文献
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城市交通流信息相似性分析与研究 总被引:11,自引:3,他引:11
信息处理日益成为智能交通系统发展中的一个重要环节,它要求智能交通系统不断集成新的信息技术以实现信息的采集、融合、组织和处理。生物信息技术在ITS信息处理中的应用成为其中新兴的研究方向。为证明交通信息具有生物遗传属性,本文定义了相似系数及波动系数作为交通流的相似性判据,并对城市交通流单点流量信息在时间轴上的相似性进行实验与数据分析,从而证明了其相似性的存在。文章还对该特性在交通流信息处理中的几种可能应用进行了分析和讨论。 相似文献
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