事件检测中交通流检测点布设方法  

Method for traffic flow detector arrangement

作　　者：张汝华[1] 杨晓光[2] 

机构地区：[1]山东大学,山东济南250061 [2]同济大学,上海200092

出　　处：《土木工程学报》2008年第10期100-105,共6页China Civil Engineering Journal

基　　金：十五国家科技攻关资助项目(2002BA404A01)

摘　　要：在分析各种影响事件检测性能因素的基础上,根据事件平均检测时间中事件信号传播时间的要求,运用交通流波动理论和线性交通流模型,建立事件检测点间距与事发前交通状态、事件严重程度、事件检测时间的定量化关系模型,给出满足不同功能需求的检测点间距范围。该模型针对单截面和双截面法两类事件检测类型建立,但不依赖于具体的事件检测算法,可用于指导检测点间距的确定或分析评价已有的检测点布置方案。算例分析表明,在检测时间和交通状态确定的条件下,随着事件严重程度的降低,事件检测所要求的检测点间距变小;单截面法检测点间距要求较大,双截面法检测点间距要求较小。The factors affecting incident detection performance are probed into, and models are constructed, by using traffic wave theory and linear traffic flow model according to the requirement of incident signal propagation time, to describe the quantitative relationships among incident detector interval, traffic state before incident, degree of incident severity, and incident detection time. The types and scopes of detector intervals are provided to meet different requirements. The models adapt to single and/or dual section method and incident detection type, but do not depend on any special incident detection method, and thus may guide detector interval selection or evaluate existing detector layout. Examples indicate that when the detecting time and traffic state have been confirmed, with the reduction of the severity of the incident, the distance between the detection points required by incident detection is smaller, that the distance between detection points required by the single-section method larger, and that the distance between detection points required by double-section method smaller.

关 键 词：事件检测 事件波 检测点间距 

分 类 号：U491.116[交通运输工程—交通运输规划与管理]