非机动车影响下信号交叉口转向通行能力模型的比较  

Comparison of Models for Turning Movement Capacity of Signalized Intersections Affected by Bicycles

作　　者：陈晓明[1] 邵春福[1] 赵熠[1] 李妲[1] 

机构地区：[1]北京交通大学城市交通复杂系统理论与技术教育部重点实验室,北京100044

出　　处：《北京交通大学学报》2009年第3期29-34,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家重点基础研究发展计划("973"计划)项目资助(2006CB70550000);国家自然科学基金资助项目(50778015)

摘　　要：混合交通条件下,非机动车显著影响着信号交叉口转向机动车通行能力.文章剖析了现有的非机动车影响下交叉口通行能力的解析算法,建立了基于VISSIM的通行能力仿真模型,标定了模型参数.通过算例,比较了各种解析和仿真模型.通过仿真实验分析了非机动车对机动车延误、转弯速度的影响.研究表明:各种模型得到的结果差别较大,其中,HCM(2000)与Chen等人(2007)的方法计算的通行能力与仿真实验结果较为一致.假设非机动车在机非冲突区总能够抢先通过,将导致低估机动车通行能力;而只考虑绿灯初期非机动车成群通过造成的影响,将导致高估通行能力.随着冲突非机动车流量的增加,单位数量的非机动车对机动车通行能力、延误和转弯速度的影响逐渐减小.转向车流的仿真通行能力值与平均转弯速度显著线性相关.Bicycle traffic has much effect on the capacities of turning movements at signalized intersections. This paper reviewed the prevailing analytical methods to calculate the turning movement capacities influenced by bicycles, used VISSIM to simulate the effect of bicycles, and calibrated the simulation model. A numerical example was then presented to compare the simulations with the existing analytical models. The numerical results indicate that the existing methods yield results that vary substantially. The capacities calculated by the methods of HCM （2000） and Chen （2007） fit in which the simulation experiment results better. It will result in underestimation of turning capacities to assume bicycle priority over turning vehicles, while it will lead the overestimation to merely consider the effects of bicycles crossing at the beginning of green indications. As the conflicting bicycle volumes increase, the impact of additional bicycles on vehicles decreases. The simulated capacities depend strongly on the mean turning speeds.

关 键 词：交通工程 通行能力 信号交叉口 非机动车 解析模型 仿真 延误 转弯速度 

分 类 号：U491[交通运输工程—交通运输规划与管理]