基于流量状态的路段交通信息检测器布设点优化

为了提高交通信息检测器的采集精度,需在路段确定为最优路段后寻找检测器的最优布设位置。利用路段分段后每段的断面平均速度与路段平均行程速度建立检测器契合度模型,考虑流量波动对检测器的影响,通过计入路段上不同流量状态下的最佳契合度,确定检测器的最佳布设位置点。经过实例验证,不同路段的最佳布设检测器的位置点不同,要根据实际情况进行度量。本文可为找出交通信息检测器的最优布设方案提供定量计算的方法,具有一定的实践性与有效性。     

从传播渠道看农村交通安全宣传工作的提升空间

农村交通安全宣传的重要性毋庸置疑,但长期以来存在传播渠道利用不充分,效果有待提高。笔者通过分析现有传播渠道和宣传现状,运用传播规律,分析当下农村交通安全宣传工作的提升空间,对进一步做好交通安全宣传工作提出了现实性的解决方案,以期加强和创新农村交通安全宣传教育工作,增强农民群众交通安全意识、法治意识、规则意识和文明意识。     

Lightweight Occupancy Estimation on Freeways Using Extended Floating Car Data

Advanced traffic management systems rely heavily on technology to perform accurate estimations of the current state of the traffic as well as its short-term evolution. The objectives are improving traffic flow and enhancing road safety. Their success is based on accurate monitoring of two key variables, specifically speed and occupancy. The latter of the two has, to date, received significantly less attention from the scientific community. In this work we present a lightweight method to perform “on-line” occupancy estimation. We first propose three occupancy measurements calculated from data collected by a floating car: vehicle count, percentage of stop time, and headway. We then extend these discrete values to a continuous estimation of occupancy in space and time. The proposed estimators are based on a pairwise linear regression of each of the previously calculated measurements over certain references obtained from other floating cars or magnetic loop detectors. The method has been calibrated and validated under real traffic conditions and data. Despite the ease of implementation, the method is able to reproduce the occupancy values generated by the actual loop detectors, achieving promising results, with estimation errors down to 6.52%, even before multivehicle systems are considered.     

基于北斗的节能型智能公交电子站牌的开发及应用

解决“市民出行难”问题一直是政府部门关注的民生问题,实现公交信息化是解决“出行难”问题的重要环节和出路.本文提出了一种基于北斗导航系统的节能型智能公交电子站牌系统结构设计方案,有利于市民选择公交作为出行方式.同时,能提升公交公司的服务水平和质量。     

弯道诱发道路交通安全事故分析

道路交通安全关乎我们的切身利益,其诱发因素颇多,而弯道是交通安全事故高发地。文章从汽车行驶特性、不良视距、会车超车等方面入手,分析弯道诱因与交通安全事故间的内在关系,并提出了基于GPS、GIS信息系统工程的智能交通预警思路,为交通安全控制提供理论参考依据。     

自媒体时代交通公共危机管理对策探究

随着社会经济发展,受社会车辆保有量剧增以及交通环境日益复杂等诸多因素影响,重大交通事故等突发公共事件屡见不鲜。文章针对互联网时代自媒体的特点,分析了网络自媒体时代下交通公共危机管理与突发事件处治所面临的问题,提出在当前社会结构转型条件下,处理好自媒体时代互联网上众多网民良莠不齐的信息,给予公众公开透明的信息以正视听,消除虚假信息和谣言的蛊惑,是交通管理部门必须应对、不可回避并需尽量趋利避害的重大课题。     

菜市口交叉口信号配时优化及仿真验证分析

文章针对菜市口(宣武门外大街口)交叉口现有的交通状况和存在的问题,利用经典的Webster法对交叉口进行重新配时,并且根据交叉口的交通流特点,对改善后的配时方案设计了相位间的迟起早断控制。同时运用VISSIM软件,以平均延误和平均排队长度为评价指标对各个方案进行仿真验证。输出的数据结果表明:优化的配时方案能有效地减少车辆延误和平均停车时间。     

浅谈长安高速公路交通标志的功能及设计特点

根据长安高速公路的特点,结合山西省路网结构,针对主线、服务区、普通立交、枢纽立交以及长下坡、弯路等进行交通标志的设置及比选。     

辽宁省交通工程质量检测与数据智能分析平台技术应用

辽宁省目前在建高速公路监理实验室应用并推广《交通工程质量检测与数据智能分析平台》,介绍了该系统了总体技术方案及推广应用具有的重大意义。     

Platoon-based traffic flow model for estimating breakdown probability at single-lane expressway bottlenecks

This study investigates the mechanism of traffic breakdown and establishes a traffic flow model that precisely simulates the stochastic and dynamic processes of traffic flow at a bottleneck. The proposed model contains two models of stochastic processes associated with traffic flow dynamics: a model of platoon formation behind a bottleneck and a model of speed transitions within a platoon. After these proposed models are validated, they are applied to a simple one-way, one-lane expressway section containing a bottleneck, and the stochastic nature of traffic breakdown is demonstrated through theoretical exercises.