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1、ForofficeuseonlyT1________________T2________________T3________________T4________________TeamControlNumber30413?ProblemChosenAForofficeuseonlyF1________________F2________________F3________________F4________________ImprovedHighwayTrafficRulesSummaryWiththe
2、developmentoftheeconomy,theacceleratedpaceoflife,theincreasingnumberofvehicles,andtheincreaseofcarspeeds,trafficflowandtrafficsafetyhavebecomethemostimportantfactorswhichhaveinfluencedthedevelopmentofhighways.Inordertoevaluatethecurrenttrafficrulesthefir
3、stmodelwasestablishedbasedondrivingontheright.Thefirstmodel,fromthephysicsperspective,simulatestheovertakingprocessandrelatesittothecalculationofthemaximumtrafficflow.Inthisway,afunctionrelationshipissetupbetweenthemaximumtrafficflow?max,thespaceheadwayD
4、0,speedv,accelerationa,timet,andtrafficflowdensityk.Aftercalculatingourmodelbasedontheactualdataandanalyzingtheparametersensitivity,ourmodeliswitharelativelysmallerrorunderboththeheavyandlighttraffic,and?maxismoresensitivetotimet.And,multiplelinearregres
5、sionisusedtosetupthesecondmodelwhichisafunctionrelationshipbetweenthetrafficdegreeofsafetySandeachvariableasaresult,themethodofparameterestimationisproduced.Whenapplyingtheruleofdrivingonthelefttoourmodel,weactuallyreceivedaslightlydifferentresultbecause
6、ofthephysiologicalnatureofhumans.Itshowsthatthecurrentrulesdonotenhancetheflowoftraffic.Theimprovedtrafficruleshaveproposedcombiningtheadvantagesoftwocurrentrules.Forexample,thechoiceofleftorrightisdecidedbytheweathercondition,thepavementcondition,thetra
7、fficflowandsoon;Orbuildadouble-layerhighwayfordifferentmodels.Thenthecellularautomatatheoryisusedtosetupthemodelthreewhichisapracticalrulefortheovertaking.Thismodelattachesthecellularautomatatheorytothelanechangingrulesofthehighway,calculatesandsimulates
8、thedifferentconditionsoftrafficflow.Basedonthedifferenttrafficrulesandroadconditions,theinfluencewhichcomesfromthedifferentroad-changingrulesonthetrafficflowandotherparametershavebeendiscussed.Theresultshowsthatthismodeldo
