左转短车道对信控交叉口最大通过量影响研究

来源 :中国公路学报 | 被引量 : 0次 | 上传用户:chloexg
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
为了探究设置左转专用相位对称放行时,双流向互阻塞型左转短车道进口道最大通过量及车流互阻塞概率的变化规律,基于车流泊松到达特征,考虑相邻周期车辆排队影响,运用概率论及交通流理论建立左转短车道进口道最大通过量解析模型。通过实测数据及VISSIM仿真对模型结果进行非参数假设检验及误差分析,并对影响进口道最大通过量的关键因素(短车道容量、周期、绿信比、相序、交通流量)进行敏感性分析。结果表明:在5%置信水平下模型值与实测值无显著性差异,相对误差绝对值小于10%,模型拟合度较高;当进口道车流量小于500pcu·h~(-1)时,周期时长对进口道通过量无影响,否则进口道通过量随周期的增加先缓慢增加后逐渐减小,存在最佳周期,最佳周期随左转车比例或短车道容量的增加而增加,范围为[40s,80s];当进口道车流量大于700pcu·h~(-1)时,增加短车道容量可有效提升进口道最大通过量,与独立左转车道进口道相比,短车道容量越大,通过量折减越小;当周期小于60s或左转与相邻直行车流量小于350pcu·h~(-1)时,相序对进口道通过量影响较小,反之则影响较大;先放行饱和度较大的车流可提升进口道通过量;利用该方法以进口道通过量最大为目标获得的短车道容量,相比于AASHTO短车道容量经验值,在左转或直行车比例大于等于70%时能够达到更优的车流运行效益,满足实际运行需求。 In order to explore the variation law of the maximum throughput and the probability of mutual traffic jam in the left turn short lane when the left turn dedicated phase is symmetrical, based on the arrival characteristics of the traffic poisson, considering the influence of the adjacent periodic vehicle queuing, Probability theory and traffic flow theory. Through the measured data and VISSIM simulation, the model results were tested by non-parametric hypothesis and error analysis. Sensitivity analysis of the key factors (short lane capacity, period, green ratio, phase sequence, traffic flow) . The results showed that there was no significant difference between the model value and the measured value at 5% confidence level, the absolute value of relative error was less than 10%, and the model fitting degree was high. When the traffic volume of imported roadway was less than 500pcu · h ~ (-1) The period length has no effect on the passage volume of the imported road, otherwise the passage volume of the imported road increases slowly and then decreases gradually with the increase of the period, there is the best period, the optimal period increases with the increase of left-turn car ratio or short lane capacity, Is [40s, 80s]. When the traffic volume of imported roadway is more than 700pcu · h ~ (-1), increasing the capacity of the short lane can effectively increase the maximum throughput of the entrance road. Compared with the entrance lane of the independent left turn lane, the short lane capacity When the period is less than 60s or when the left turn and the adjacent direct traffic flow are less than 350pcu · h ~ (-1), the influence of the phase sequence on the throughput of the inlet passage is small, otherwise the influence is larger. First release of a more saturated flow of traffic can increase the amount of import passage; By using this method, the maximum capacity of imported lanes to obtain the short lane capacity, compared to AASHTO short lane capacity empirical value, left turn or straight car ratio is greater than Equal to 70% to achieve better traffic efficiency, to meet the actual operation needs .
其他文献
为了研究地震作用下压弯剪扭耦合作用对桥梁中墩梁固结墩的影响规律,进行了7根压弯剪扭耦合作用下钢筋混凝土桥墩的拟静力试验,确定了桥墩的不同破坏模式,给出了桥墩的剪力-
文章阐述了在高质量发展的新形势下,煤焦钢企业基于自身特征和发展新要求,通过构建安全、稳定、高效、可持续、有竞争力的供应链体系,实现供应链上下游企业的合作和协同发展,
对于隧道工程施工建设而言,超前地质预报是保证工程施工建设安全性和高质量的重要前提条件,但是由于物探方法具有一定的间接性和多解性,如果仅仅依靠单一的物探方法来作为超
期刊
为了准确描述实际公路桥梁车辆荷载多峰厚尾的分布特征,利用分段函数结合多个高斯分布函数,并采用数据拟合方法,求得了车辆荷载的概率密度函数和概率分布函数表达式,建立了车
说到李鹏同志最关注的两大行业,当数能源和交通.作为国务院副总理、总理,他对此给予了长期关注,并倾注了巨大心血.他对交通运输发展所处的宏观经济环境、发展阶段以及交通运
期刊
期刊
为了评定秋千座椅防撞击试验装置性能的各项技术指标和技术特性[1],本文根据JJF 1059.1—2012《测量不确定度评定与表示》的规定和GB/T 28711—2012《无动力类游乐设施秋千》
整合素是一种在哺乳动物体内广泛表达的细胞表面受体,整合素连接激酶(ILK)是整合素信号通路的关键激酶,其与整合素结合进行细胞与细胞外基质(ECM),甚至细胞与细胞之间的信号
当前的物流竞争已经由供应链之间的竞争转变到物流网络之间的竞争,而对于钢铁企业的物流发展而言,物流网络体系的构建尚不系统,且具有成本高、效率低的特点.因此,企业必须以