基于RFID技术的港口集装箱车辆管理方案设计

以F港为研究对象,调查了该港口集装箱车辆管理的现状,分析了在车辆管理中出现的问题,提出在车辆及集装箱上应用RFID技术的集装箱车辆管理方案。方案的实施能对进入港口的车辆和集装箱信息进行采集、识别和跟踪,提高车辆通过的速度和码头作业效率。     

交通信息化建设RFID技术应用分析

通过结合工作实际,以RFID技术为研究背景,对交通信息化建设RFID技术应用情况进行分析。首先阐述了RFID技术内涵及组成,而后分别从RFID系统工作原理、技术应用过程等层面,详细探究了RFID技术在交通信息化建设中的应用情况。     

基于OBD、GPS与3G技术的车辆性能远程监控系统

为提高车队管理和车辆维修技术水平,提出并设计一套车辆性能远程监控系统,该系统整合OBD、GPS、3G无线通信模块和GIS平台,可将采集的车辆运行状态信息和定位信息等透过3G网络回传至企业监控中心,便于使用者实时掌握车辆的运行状况,包括车辆OBD故障信息、车速、引擎转速、电瓶电压、冷却水温、行车日期与时间、行车地点与路径信息等。该系统可使车辆保修人员与车队管理人员远程了解车辆的实时状况与所在位置,从而做出相应的维修和管理对策,对保持车辆正常的技术状况、实现节能、环保、安全运营具有较高的应用价值。     

智能交通中的情报采集与管理

本文介绍了一种智能交通情报采集方法。系统以RFID技术为纽带,给出了系统组成框架形成了电子注册、车辆管理、行进诱导等功能与思想,是智能交通建设的一种探索与尝试,具有很好的应用和推广价值。     

浅议电子标签物流控制系统

提出一种基于RFID电子标签的物流控制管理系统,该系统利用RFID电子标签做货物识别,利用IC卡做有关人员的身份识别,利用GPS技术做货物实时定位,利用GPRS系统短信传输货物信息,从而实现对重要货物进行全程监控.     

交通流量监控系统的设计与实现

随着我国城市化进程的加快,城市规模不断扩大,城市人口也越来越多,这给城市交通管理提出了更高的要求。利用交通流量监控系统,可以对交通流量进行监控与管理,从而有效缓解城市交通拥堵问题。交通流量监控系统是基于GPS(全球定位系统)和GIS(地理信息系统)来设计和实现的,通过这些系统的配合,可以将车辆信息无线实时地传递到车辆监控中心,车辆监控中心从而对车辆进行调度。本文探讨了交通流量监控系统的工作原理及系统构成,分析了交通流量监控系统实现其功能的方式,并对交通流量监控系统的软硬件进行了设计。     

一种基于车联网的路网监测系统设计

车联网是物联网技术在交通领域的典型应用。随着信息技术的迅速发展和路网管理能力的不断提高,路网监测手段越来越多,对于监测数据的准确性、及时性与服务信息的个性化等要求越来越高,车联网也成为提升智能路网监测能力的强有力手段。本文提出的基于车联网的路网监测系统,以车辆作为信息的提供者、校验者和使用者,实现车内网、车际网、车辆与移动互联网之间的信息交互共享,提高路网监测系统的信息准确性、时效性及利用率,并为应急处置和出行服务提供技术支持。     

江苏省重点营运车辆技术管理现状研究

近年来,江苏省内发生多起道路运输事故。调查表明,事故发生与涉事车辆的安全技术状况均有一定的直接关系。因此,对于交通运输管理部门来说,加强道路运输企业安全监管,督促企业认真执行道路运输车辆技术管理各项标准、规范和制度就显得尤为重要。本文从车辆技术状况抽检情况、车辆检验检测信息系统应用情况、事故发生与车辆技术状况抽检对比分析、车辆技术状况管理情况四个方面对2021年度江苏省车辆技术检测情况进行分析,归纳出车辆技术状况检测与管理中存在的主要问题,并提出相应的管理措施和发展建议。     

几厘米震动都难逃“北斗眼”

<正>2013年1月14日,交通运输部发出通知,要求9个示范省市的大客车、旅游包车和危险品运输车辆,于3月底前80%以上安装上北斗车载终端。6月1日后,凡未按规定安装北斗导航的车辆,不予核发或审验道路运输证。在"两客一危"车辆管理中的北斗车辆指挥监控系统属于北斗高精度应用,其工作原理很简单,即在管理车辆上安装北斗高精度定位终端,定位终端通过普通通讯手段(如CDMA、GPRS等)将车辆信息实时传输到指挥监控系统,从而对车辆的状况进行实时监控。通过北斗高精度的应用,可以对车辆     

浅谈城市道路救援远程监管服务体系

城市道路救援是城市交通管理的重要组成部分,其智能化信息化水平的应用程度和相关体制机制建设在一定程度上影响了城市一体化协同发展.本文基于长三角一体化应急管理协同发展框架背景下,结合当前行业监管系统平台的情况,对充分发挥突发紧急情况下,建立远程监管服务模式、用户需求和实现路径进行了探索,以构建数据联网、车辆联合管控的"一体化、高实效、多层次"协管体系,有效解决传统道路救援监管系统问题,切实助力长三角一体化协同管理机制.     

An agent-based framework for cooperative planning of intermodal freight transport chains

The recent development of Intelligent Transportation Systems offers the possibility of cooperative planning of multi-actor systems in a distributed framework, by enabling prompt exchange of information among actors. This paper proposes a modeling framework for cooperation in intermodal freight transport chains as multi-actor systems. In this framework, the problem of optimizing freight transportation is decomposed into a suitable set of sub-problems, each representing the operations of an actor which are connected using a negotiation scheme. A Discrete Event model is developed which optimizes the system on a rolling horizon basis to account for the dynamics of intermodal freight transport operations. This framework allows for an event driven short/medium term planning of intermodal freight transport chains. The proposed methodology is evaluated using a realistic case study, and the results are compared against the First-Come-First-Served strategy, highlighting the significance of cooperation in systems operating close to capacity.     

An RFID-based inventory management framework for emergency relief operations

In the aftermath of super storm Sandy, a large region from North Carolina to Maine endured food shortages, power outages, and long lines at gas stations forced to ration fuel due to low supply and high demand. These issues were largely the result of the affected transportation network’s inability to effectively cope with random and highly dynamic changes, and a lack of available resources and suppliers who were capable of enacting adequate emergency response measures. These problems experienced during super storm Sandy further underscored the need for a robust emergency inventory management system, where planning policies can be integrated with real-time on-line inventory management strategies to keep track of fluctuations of vital commodities such as food, water, medicine, fuel and power supplies. Motivated by this important problem, this paper investigates a comprehensive feedback-based emergency management framework for disasters such as super storm Sandy that provides integration with an emerging intelligent transportation systems technology, namely Radio Frequency Identification Devices (RFID). Within this framework, the offline-planning problem is solved by the stochastic humanitarian inventory management approach; and the online modeling strategy includes the application of a continuous time model predictive control technique. After introducing the mathematical background, the proposed framework is discussed using case studies built based on super storm Sandy in order to understand the efficiency and practicality of this RFID-based methodology. Results suggest that the methodology can properly account for and react to the rapidly changing needs for vital supplies that occur during the emergency relief operations. Based on this approach, planners and decision makers can be aware of the time delay that can happen due to disaster-related disruptions and thus maintain a safe level of buffer for vital supplies.     

System performance and user response under real-time information in a congested traffic corridor

A modelling framework is developed to analyze the effect of in-vehicle real time information strategies on the performance of a congested traffic communing corridor. The framework consists of a special-purpose simulation component and a user decisions component that determines users' responses to the supplied information. The user decisions component is microscopic and determines individual commuters' route switching, at any node of the network, as a function of the supplied information. The traffic simulation component moves vehicles in bundles or macroparticles at the prevailing local speeds, as determined by macroscopic traffic relations. The framework allows the investigation of system performance under alternative behavioral response mechanisms, as well as under different information strategies. Results are presented for simulation experiments in a commuting corridor with a special network structure that simplifies the network computations. The results illustrate the effect of the fraction of users equipped with in-vehicle navigation systems on overall system performance. In addition, alternative assumptions on user response reflecting varying degrees of optimizing behavior are explored. The modelling framework is shown to provide a useful approach for addressing key questions of interest in the design of real time in-vehicle information system.     

Simulation studies of information propagation in a self-organizing distributed traffic information system

This paper investigates the feasibility of a self-organizing, completely distributed traffic information system based upon vehicle-to-vehicle communication technologies. Unlike centralized traffic information systems, the proposed system does not need public infrastructure investment as a prerequisite for implementation. Due to the complexity of the proposed system, simulation is selected as the primary approach in the feasibility studies. A simulation framework is built based on an existing microscopic traffic simulation model for the simulation studies. The critical questions for building the proposed market-driven system are examined both from communication requirements and traffic engineering points of view. Traffic information propagation both in freeway and arterial networks via information exchange among IVC-equipped vehicles is tested within the simulation framework. Results on the probability of successful IVC and traffic information propagation distance obtained from the simulation studies are generated and analyzed under incident-free and incident conditions for various roadway formats and parameter combinations. Comparisons between the speed of the incident information wave and the speed of the corresponding traffic shock wave due to the incident are analyzed for different scenarios as the most crucial aspect of the information propagation as a potential foundation for application in such a decentralized traffic information system.     

Effects of antenna position on readability of RFID tags in a refrigerated sea container of frozen bread at 433 and 915 MHz

Perishable foods are frequently exposed to temperature abuse during transportation and distribution. The use of traditional data loggers do not permit the instantaneous data transmission that radio frequency technology offers. Temperature has a major impact on food quality and safety, particularly when long transit times are imposed. Consequently, using radio frequency identification (RFID) to track and monitor temperature in perishable shipments will bring significant benefits to the cold chain. The goal of this study was to determine the optimal RF antenna placement to achieve full RFID tag readability inside a sea container. Testing was made at two different frequencies (915 and 433 MHz) while the refrigeration unit was running at −25 °C and the container was fully loaded with frozen bread. The sea container was instrumented with eight RFID antennas, three of which were tuned for 433 MHz and five for 915 MHz. All antenna wires exited the container via the forward drain holes. The RFID readers were outside the container and connected to their respective antennas, one at a time. Thirty eight RFID tags were evenly distributed onto the pallets of frozen bread. All RFID tags were active tags capable of reading and recording temperature. Results at 915 MHz showed readability levels between 47% and 79%, with an average of 68.4%, whereas 433 MHz demonstrated 100% readability at all antenna positions. In conclusion, the 433 MHz RFID system appears suitable for real time temperature monitoring of frozen bread inside a sea container. This technology could be applied to other food items similar to frozen bread.     

A hierarchical customer satisfaction framework for evaluating rail transit systems of Istanbul

This paper provides a hierarchical customer satisfaction framework to measure rail transit lines’ performances in Istanbul. The problems related to rail transit line systems are addressed via customer satisfaction surveys. Then, a framework is proposed combining statistical analysis, fuzzy analytic hierarchy process, trapezoidal fuzzy sets and Choquet integral to evaluate customer satisfaction levels. Next, the criteria need to be improved are determined and specific recommendations to enhance the operation for specific lines are suggested. The proposed framework provides directions for the future investments and it also can be used at a more macroscopic level to determine the operational deficiencies. Furthermore, it can be generalized and applied to complex decision making problems that include uncertain and subjective data or vague information.     

An integrated framework for embedding large-scale dynamic traffic assignment models in advanced traveler information systems

In recent years, increasing attention has been drawn to the development of various applications of intelligent transportation systems (ITS), which are credited with the amelioration of traffic conditions in urban and regional environments. Advanced traveler information systems (ATIS) constitute an important element of ITS by providing potential travelers with information on the network's current performance both en-route and pre-trip. In order to tackle the complexity of such systems, derived from the difficulty of providing real-time estimations of current as well as forecasts of future traffic conditions, a series of models and algorithms have been initiated. This paper proposes the development of an integrated framework for real-time ATIS and presents its application on a large-scale network, that of Thessaloniki, Greece, concluding with a discussion on development and implementation challenges as well as on the advantages and limitations of such an effort.     

Design and development of interactive trip planning for web-based transit information systems

This article presents a Web-based transit information system design that uses Internet Geographic Information Systems (GIS) technologies to integrate Web serving, GIS processing, network analysis and database management. A path finding algorithm for transit network is proposed to handle the special characteristics of transit networks, e.g., time-dependent services, common bus lines on the same street, and non-symmetric routing with respect to an origin/destination pair. The algorithm takes into account the overall level of services and service schedule on a route to determine the shortest path and transfer points. A framework is created to categorize the development of transit information systems on the basis of content and functionality, from simple static schedule display to more sophisticated real time transit information systems. A unique feature of the reported Web-based transit information system is the Internet-GIS based system with an interactive map interface. This enables the user to interact with information on transit routes, schedules, and trip itinerary planning. Some map rendering, querying, and network analysis functions are also provided.     

Enhancing stated preference surveys in transportation research: the contribution of geographic information systems

In this paper we argue that visualization, data management and computational capabilities of geographic information systems (GIS) can assist transportation stated preference research in capturing the contextual complexity of many transportation decision environments by providing respondents with maps and other spatial and non-spatial information in graphical form that enhance respondents' understanding of decision scenarios. We explore the multiple inherent contributions of GIS to transportation stated preference data collection and propose a framework for a GIS-based stated preference survey instrument. We also present the design concepts of two survey prototypes and their GIS implementation for a sample travel mode choice problem.     

甩挂运输半挂车电子标识技术研究

针对现阶段的道路运输远程监控体系中无法识别半挂车的身份与特征信息的问题,通过对甩挂运输企业、站(场)、整车生产企业进行广泛调研,文中提出了基于RFID无线射频技术的甩挂运输半挂车身份电子标识技术要求,分析了电子标识具体技术参数的限值范围,为规范甩挂运输半挂车身份电子标识的发展提供了技术支撑。