基于元胞自动机的城市路段混合交通流建模与仿真

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1、北京交通大学硕士学位论文基于元胞自动机的城市路段混合交通流建模与仿真姓名：应力天申请学位级别：硕士专业：城市交通工程指导教师：魏丽英;邵春福20080601ABSTRACTChinaisakingdomofbicycleswithmostpeopletakingitasthemostimportanttooloftransportation．Duetotheubiquityofbicycles，transportationsystembecomesmorecomplicatedandmixedtrafficisalsoextremelyprominen

2、t．Moreover,theinterferenceofbicyclesonmotorvehiclesisoneimportantinducementtocausetrafficjams．Therefore，itismeanfultooptimizemixedtraffic．Proposedin1990s，thisnewdynamicsmodelCA(CellularAutomaton)ModelforTrafficFlowanditsdevelopmenthasofferedUSnotonlyanewtheoreticalapproachtotraf

3、ficflow,butalsoanefficienttoolinregardtothestudyofsystematicintegrativebehaviorsandcomplexphenomenaindynamictheoriesoftrafficflow．Atthebeginningofthispaper,wereviewstheclassicalmodelsintrafficflowtheories，andexploresindepththeconnotationofCAModelforTrafficFlowanditsmainmodelsapp

4、lication．Onthisbasis，modelsformixedtrafficflowinChinesecitiesarebuiltandtheirvalidityandreliabilityareanalyzedthroughsimulation．ThedetailedfindingsareshownaSfollows：PlanarCAmodelforbicycleflowhasbeenbuiltinchapter3．Thismodelnotonlytakesmaximumvelocitydifferencesbetweendifferentr

5、idersintoconsideration，butalSOprobesintorandomslowdownprobabilityandfindsthatrandomslowdownisdirectlyproportionaltovelocityTheresultofsimulationindicatesthatthismodelisofhighperformanceintheaspectsofcapacitysimulationandvelocitysimulation，consistentwiththeoreticalvaluesandmeasur

6、edvalues．Chapter4proposestwoamelioratedCAmodelsforbicyclesandmotorvehicles：oneisunderthisconditionoffricationinterferenceinmixedtra街c．Itconcludesthatwhenthedensityofmotorvehiclesisandthatofbicycles，thevelocityofmotorvehiclesismuchmoresensitivetothechangeofbicyclesdensitywhilebic

7、yclesarerarelyinterferedbyfricationinterference．Thevalidityofmodelsisalsovalidatedbyinstances．Anothermodelisunderthesituationofretracedinterferenceinmixedtraffic．Simulationresultsdemonstratethatinthissituationtheinterferenceinfluencesonbothbicyclesandmotorvehiclesaresignificant．

8、KEYWORDS：Tra伍Cflow：CellularAutomaton；Trafficsim