城市快速路苜蓿叶互通立交交织区影响范围研究.pdf

»11 »1ù2011M2ŒY{"dýñАJournalofTransportation SystemsEngineering and Information TechnologyVolnull11 null Nonull1Februarynull 2011ÓcI|: 1009null6744 ( 2011) 01null0173null06ìg yÎ^=ºY 댌®u•YS¶ùî臧晓冬*(<ÜvÐr!ýñÐý,<Ü510006)K1: null 快速路苜蓿叶互通立交通行能力研究中,交织区影响范围是其中重要的参数.本文分析了null美国通行能力手册null(HCM2000)对分合流区和交织区的划分原则应用在苜蓿叶互通立交上的局限性. 通过采集广州市快速路苜蓿叶互通立交上的数据,应用理论分析和数理统计的方法,研究了苜蓿叶互通立交A型交织区(交织车辆至少需要 1次车道变换)和 C型交织区(一股车流不用车道变换,另一股需要两次或两次以上车道变换)上下游的车头时距分布特性. 研究结果表明,交织区对上下游的交通流有影响,A型交织和 C型交织上下游的车头时距分布符合三参数韦布尔分布. 然后根据韦布尔分布中形状参数随距离的变化规律,确定了苜蓿叶互通立交A型交织和 C型交织对上下游的影响范围.1oM: null 交通工程;影响范围;数理统计;苜蓿叶互通立交;交织区Ïms Ë|: null U491. 1ÓDSM’: null AResearchonInfluentialExtentofWeavingAreaonUrbanExpresswayCloverleafInterchangesZANG X iaonulldong( School ofC ivilEngineering, GuangzhouUniversity, Guangzhou 510006, China)Abstract:null The influential extent ofweaving area is an important factor in the research of the cloverleaf innullterchanges capacity. This paperhas analyzed the lim itation ofusing thedividingprinciple in thediverging arnullea, themerging area and theweaving area fromHCM2000 on cloverleaf interchanges. Based on the datasurnullveyed on the cloverleaf interchanges in Guangzhou, according to the theoretic analysis and the statistic theonullry, researching the time headway distribution characteristics in the upstream and the downstream ofA typeweaving area(W eaving vehicles in both directions must make one lane change to successfully complete aweavingmaneuver. ) and C typeweaving area (W eaving vehicles in one direction may complete aweavingmaneuverwithoutmaking a lane change, whereas other vehicles in theweaving segmentmustmake two ormore lane changes to successfully complete aweavingmaneuver), the researching results have verified thattheweaving area influences the traffic flow characteristics of its upstream and its downstream, and the timeheadway distribution in upstream and downstream ofA typeweaving area and C typeweaving areaof clovernullleaf interchanges accords w ith the three parametersW eibull distribution, then according to the variationalrule of shape parameter inW eibullmodelwith the distance, the paper confirms the influential extent ofAtypeweaving area and C typeweaving area to its upstream and its downstream.Keywords:null traffic engineering; influentialextent; statistic theory; cloverleaf interchanges; weaving areaCLC number:null U491. 1 Documentcode: null Alà°ù: 2010null11null10null null©í°ù: 2010null12null09null nullc¨°ù: 2010null12null17Á[":SE S/¦ê9Ã["( 2006BA J18B03);y!† S/["( 2008- K5- 6).T€eº:kë( 1969- ),3,‘C~_E¦,¬q,pV.*YßT€: zxdzxdzxd69@ yahoo. com. cn1null„null nullýÍM Ÿ,T¹ìg8†ŒY{"d¥×1Fî†s,áSìg yÎ^¥y!|¤É@?Z,ìg yÎ^³ %ìg¹ëŒYš
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