多匝道系统的流量优化配置

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1、AbstractW池therapiddevelopmentofthesocialeconomyinrecentyears，thecontradictionbetweentheincreasingtrafficdemandsandtherelativelagofthetransportationconstructionhasbeenaprominentworldwideproblem．Inordertoeffectivelyutilizethelimitedtrafficresourcesandad

2、optthescientifictheorytoguide锄cdesignandconstruction,麟cflowtheoryresearchemerges硼thetimesrequire．Theaimoftrafficflowresearchistoestablishthetl'a伍cflowmodelswhichcandescribethegeneralcharacteristicsofrealtrafficsituationsandrevealthebasicrulesoftraffic

3、flow,aswellastoseekoptimizingcontrolmethodstoalleviatetrafficcongestion,inhopetoprovideaguidanceforthetransportdepartmentstobetterplan，designandimprovethe碱cnetworkcontrollingsystem．Tl斌iccongestionisusuallycausedbytrafficbottleneckintherealtrafficsitua

4、tion．Amongthevarioustypesofbottlenecks，on-rampsandoff-rampsaretheimportanteomposidonoftrafficsystems，whichinteract、)17i血the缸alticflownearthebottleneck．Therampbottleneckinteractionsnotonlydeterioratethe蛐ccapacitybutalsoinducemanycomplicatedphenomena．In

5、thispaper,weestablishedthecellularautomatatra伍cflowmodelsofmultiplerampssystems(multipleconsecutiveon-rampssystem，themixedrampssystemwithanoff-ramp)basedonthefamousNaSehmodel．TheTrafficbehaviourseal-theramphavebeeninvestigatedbynumericalsimulationanda

6、nalytical。analysis．Somequalitativeadvicesandsuggestionsaremadetoll'affiCprojectcontrolandIrafficmanagementrules．Thecontentsofthepaperareasfollows：1．Westudytheinteractionbetweeneachon-rampinmultipleconsecutiveon-．rampssystemandassignthefixedtotalon-ram

7、pinflowtoeachon-rampSOastomaximizehighwaycapacity．Firstlywestudytrafficflowonahighwaywiththl℃econsecutiveon-rampsbyusingtheNagel-Schreekenbergmodel，whichisageneralizationofourpreviousworkconcerningwithhighwaywithtworamps．Westillfocusonhowtoimprovethes

8、ystemcapacitybyassigning锄cdemandtothethreeramps．Itisshownthatwhenallrampsareinfreeflowandthemainroadupstreamoftherampsisincongestion，assigningahighestproportionofthedemandtotheupstreamon-ramp，andlowestproportionofthedemandtothedownstreamon—ram