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1、SimulationoftrafficflowwithtrafficlightstrategiesviaamodifiedcellularautomatonmodelJournalofShanghaiUniversity(西Edition),2006,to(3):180—191ArticleID:1007-6417(2006)03.0189.03'SimulationoftrafficflowwithtrafficHghtstrategiesv/aamo衄edcellularautomatonmodelHEHong
2、-di(何红弟),DONGLi-yun(董力耘),ShanghaiInstituteofA】捌MathematicsandM~chanics,DAI5'hi-qiang(戴世强)ShanghaiUniversi,Shanghai200072,P.R.ChinaAbstract麓mcflowscontrolledbytraf~cnghtstrategieswereinvestigatedv/aacellularautomatonmodelwithanticipation.whichissuitablefordescr
3、ibingurban蛐c.Threekindsofstrategies.t.e.,synchronized,green-waveandrandomswitchingnghts,werede-signed.simulatedandcomparedwitheachother.Itisshownthatthegreen-wavestrategyisonlyvalidatlowerdensityandthereisnotaneffectivewaywiththethreestrategiestoimprovetheeffi
4、ciencyof蛐cflowathighdensity.KeywordsU'affieflow.cenuhrautomatonmodel,traf~eUghtstrategy.2000MathematicsSubjectClassification76P051IntroductionRecently,moreattentionhasbeenpaidtourbantraffic,especiallythetra_i~cflowcontrolledbytra~clights.Tra.f~clightcontrolstr
5、ate-gYiscrucialforim-provingthee蚯ciencyofurbantransportationnetwork.田lecellularautomaton(CA)modelshavebeenexten.sivelyusedtoinvestigatetral~cflowinmanyaspects,whichprovideaneffectivetechniqueforinvestigatinglarge—scaletraf~csystems.NagelandSchreckenberg…propos
6、edacellularautomatonmodel(namedasbytheNaSchmodelhereafter)toininlicsingle-lanehighwaytraf~c.Biham.MiddletonandLevinepresentedasimple2DCAmodel(B胤)f0rurbantral~c,inwhichvehiclesonlyhopfromanintersectiontoanother.adja—centone.ChowdhuryandSchadschneiderproposedane
7、xtendedBMLmodelincorporatingwiththeNaSchmodel,namedasbytheChSchmodelhereafter,whichinsertsalanebetweentwosuccessiveintersec一廿oils.nleChSchmodelpresentsamorerealisticde.scriptionofurbantraf~c.WiththeChSchmode1.Brockfeld.eta1.[4Jstudiedtheoptimizationoftraf~clig
8、hts.Theyshowedthatthetraf~cfluxisimprovedbytrKf~clightcontrolstrategiesandthederivationoftheoptimalcycle廿meinahomogeneousnetworkcanbereducedtothecaseofasinglestreet.SasakiandNa.gat
