项目名称: 过饱和状态下的城市主干道交通特性分析和交通状态参数估算
项目编号: No.51278021
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 建筑科学
项目作者: 王云鹏
作者单位: 北京航空航天大学
项目金额: 85万元
中文摘要: 交叉口渠化设计和主干道交通信号协调控制与优化是高效地管理城市主干道过饱和交通流、缓解交通拥堵的有效方法。由于现有的交通流模型需全息交通数据,在无法获取全息交通信息时,已有的交通流模型就无法为交叉口渠化设计、信号优化和评估提供有效参数。本项目利用主干道上布设的信号控制信息,分析过饱和状态下交叉口交通流的积聚和消散过程,建立基于交通波理论的信号交叉口交通流演化模型,揭示过饱和交叉口交通波的传播机理,研究过饱和状态下的排队车检器占有时间分布规律,辨识车辆积聚和消散关键时间点,建立信号交叉口交通流波形图,估算过饱和状态下的交叉口的车辆排队长度;揭示主干道车辆队列形成、保持和消散机理,建立基于队列的主干道交通流模型,提取表征队列运行的特征参数,研究队列形成、组合、分解和辨识算法,以队列为特征要素估算主干道旅行时间。本项目可为过饱和状态下的交叉口渠化设计、信号优化和性能评估提供新的交通状态估算方法。
中文关键词: 过饱和;交通流;排队长度估算;旅行时间估算;交通仿真
英文摘要: The channelization of intersection and traffic signal coordination and control and optimization of arterials roads are taken as effective ways to manage oversaturated traffic flow and to ease traffic congestion. However, the majority of existing traffic flow moddels can only take effect on the basis of assumptions that all traffic information had been known. Without these information, the existing traffic flow models cannot provide effective parameters for designation of intersection channelization,signal optimization and evaluation. This project studies the ways using traffic flow and signal information which can be gotten easly from the existing road conditions to analysis accumulation and dissipation processes of the traffic flow oversaturated, excavate the temporal distribution of the platoon through the detectors, identificate the key points of the accumulated and dissipated platoons,and describe the shockwave diagram for signal controlled intersections.In that case, estimate the queue length of oversaturated intersections. On the above basis, the study will also reveal the mechanism of the formation, maintenance, and digestion phenomena of the arterial traffic flow platoon, build up the traffic models for arterial section based on the platoons and extract the characteristic parameters which represent th
英文关键词: Oversaturation;Traffic flow;Queue length estimation;Travel time estimation;Traffic simulation