Secondly , the expert system of signalized intersection is introduced . the system includes sub - system of geometric design , sub - system of signal timing and sub - system of traffic organization 交叉口优化专家系统包括交叉口的几何设计专家子系统、信号设计专家子系统、交通组织设计专家子系统三方面的内容。
Several techniques are discussed , when establishing this system . the expert system of signalized intersection initiates a new research field of urban road traffic management . thirdly , the sub - system of signal timing is presented 信号交叉口优化专家系统开创了道路交通管理研究的新领域,为充分发挥交叉口的时、空资源提供了新的理论框架。
Most of works we have done are only drawing lessons from foreign advanced experiences . based on the situation of optimal design of signalized intersection , a system of optimal design of signalized intersection was put forth 对于任何一个城市,加强道路基础设施建设、改善城市快速干道系统是必要的,但做好平面交叉路口的规划、设计、治理和管理工作无疑具有极其重要的意义。
In chapter 5 , the methodologies of calibrating the road weight measured by travel time based on road impedance function model and signalized intersection delay model are proposed , and are realized and verified using a large amount of field data 论文第五章提出了基于路阻函数模型和信号交叉口延误模型,标定以出行时间度量的道路权重的方法体系,并利用实测数据加以实现和检验。
Vehicle delay at signalized intersections is the important measure of running efficiency and server quality . it reflects not only the drivers discomfort , restrain , oil consume , time lose , but also reflects the logical of signal control and design 信号交叉口延误是评价信号交叉口的运行效率和服务水平的重要度量,它不仅反映了司机不舒适和受阻程度以及油耗和行驶时间损失,还反映了信号控制、设计的合理性。
Several popular and classical traffic control systems , such as transyt , scats and scoot are analyzed . moreover , some achievements in research of signalized intersection are earned in china . however , the start of studying signalized intersection is too late 在我国,由于近年机动车保有量迅速增加、交通基础设施建设滞后以及管理措施不够完善等原因,致使平面交叉路口的交通拥堵日趋严重,进而影响到城市路网通行能力的发挥。
In addition , in the paper great attention is paid on the advantages and disadvantages of the waiting area for left - turn vehicles at signalized intersections , and the capacity and application principle of advance right - turn vehicle flows , which are put in practice but lack of theory supports 第四章是针对左转待转区在实际使用中存在的误区,对左转待转区的设置利弊进行了详细的分析和研究,得出了左弯待转区的优缺点以及在工程使用中应该注意的事项。
Because of the different function of roads and the difference of region , the form of intersections and connections between them is different with each other . at present , the types of nodes adopted in china and abroad include uncontrolled intersections , all - way stop - controlled intersections , two - way stop - controlled intersections , signalized intersections , roundabouts , grade - separated junctions and their combinations . each type of nodes has different characteristics and adapts to different function demands 城市道路是以网络形态分布于城市区域内的地面交通设施,由于道路的功用不同以及地域的差异,各道路间的交叉和连接方式各不相同,目前国内外所采用的节点形式有无控制平交节点、全停牌控制平交节点、二路停牌控制平交节点、信号灯控制平交节点、平面环行节点、立体交叉节点以及它们的组合形式,各种节点具有各自的特性,适合于不同的功能需求。
This paper mainly analyzes control delay at urban signalized intersections . based on the survey data , this paper talks about vehicles movement characteristics of arrival and depart process , then the queueing headway distribution is obtained , and the suggestion that saturated flow should be measured from the sixth queuing vehicle is offered . using random process theory analysis and computer simulation , the queuing length distribution model is obtained 本论文针对平面信号控制交叉口的延误问题进行了分析,在实测数据分析的基础上,探讨了车辆到达过程和离开过程的运行特性,给出信号交叉口排队离散车头时距分布模型,提出饱和流率的测量应从第六个离开的排队车辆算起;运用随机过程理论和计算机模拟的方法得到了信号交叉口排队长度分布模型,在此基础上运用协调变换的方法改进了车辆延误模型。