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1、ForofficeuseonlyT1________________T2________________T3________________T4________________TeamControlNumber30413?ProblemChosenAForofficeuseonlyF1________________F2________________F3________________F4________________ImprovedHighwayTrafficRulesSummaryWiththedevelop
2、mentoftheeconomy,theacceleratedpaceoflife,theincreasingnumberofvehicles,andtheincreaseofcarspeeds,trafficflowandtrafficsafetyhavebecomethemostimportantfactorswhichhaveinfluencedthedevelopmentofhighways.Inordertoevaluatethecurrenttrafficrulesthefirstmodelwasesta
3、blishedbasedondrivingontheright.Thefirstmodel,fromthephysicsperspective,simulatestheovertakingprocessandrelatesittothecalculationofthemaximumtrafficflow.Inthisway,afunctionrelationshipissetupbetweenthemaximumtrafficflow?max,thespaceheadwayD0,speedv,acceleration
4、a,timet,andtrafficflowdensityk.Aftercalculatingourmodelbasedontheactualdataandanalyzingtheparametersensitivity,ourmodeliswitharelativelysmallerrorunderboththeheavyandlighttraffic,and?maxismoresensitivetotimet.And,multiplelinearregressionisusedtosetupthesecondmo
5、delwhichisafunctionrelationshipbetweenthetrafficdegreeofsafetySandeachvariableasaresult,themethodofparameterestimationisproduced.Whenapplyingtheruleofdrivingonthelefttoourmodel,weactuallyreceivedaslightlydifferentresultbecauseofthephysiologicalnatureofhumans.It
6、showsthatthecurrentrulesdonotenhancetheflowoftraffic.Theimprovedtrafficruleshaveproposedcombiningtheadvantagesoftwocurrentrules.Forexample,thechoiceofleftorrightisdecidedbytheweathercondition,thepavementcondition,thetrafficflowandsoon;Orbuildadouble-layerhighwa
7、yfordifferentmodels.Thenthecellularautomatatheoryisusedtosetupthemodelthreewhichisapracticalrulefortheovertaking.Thismodelattachesthecellularautomatatheorytothelanechangingrulesofthehighway,calculatesandsimulatesthedifferentconditionsoftrafficflow.Basedonthedif
8、ferenttrafficrulesandroadconditions,theinfluencewhichcomesfromthedifferentroad-changingrulesonthetrafficflowandotherparametershavebeendiscussed.Theresultshowsthatthismodeldo