Analysis of the influence of occupation rate of publictransit vehicles on mixing traffic flow in a two-lane system

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1、16741o56／2009／18(09)／4037_。05ChinesePhyvsicsB一and10PPl1blishin一========：=========================：=====二=二二二二二二=二二二二二__二二二二二二———————————————————————————————Analysisoftheinfluenceofoccupationrateofpublictransitvehiclesonmixingtraficflowinatwo—lanesystem丰QianYong-Sheng(~z4：)。)”，shiPei—Ji(石培基)，Ze

2、ngQiong(~琼)，MaChang—xi(马昌喜)，LinFang(；~k芳)，SunPeng(N~鹏)，andYinXiao—Ting(尹小亭)a))SchoolofTraficandTransportationLanzhouJiaotongUniversity,Lanzh。u730070，．China)SchoolofGeographyandEnvironmentScienceNorthwestNorrealUniversLan0l】730070，China，(Received27December2008；revisedmanuscriptreceived23January

3、2009)Basedontheexistingclassicalcellularautomatonmodeloftraficflow，acellularautomatontraficmodelwithdln0ent—maximum—speedvehiclesmixedonasinglelaneisproposed，inwhichpublictransitandharbour—shapedbus。t。Paretakenintoconsideration．Parameterssuchaslengthofcellularautomaton，operationspeedandrand0ms

4、lowmecnanismarere—demarcated-Aharbour—shapedbusstopissetupandthevehiclechanginglaneregulationischanged．1nughcomputersimulation，theinfluenceofoccupationrateofpublictransitvehiclesonmixedtraficflowandtraficcapacityisanalysed·Theresultsshowthatapublictransportsystemcaneaseurbantraficcongestionbut

5、createsnewjamsatthesametime，andthattheinfluenceofoccupationrateofpublictransitvehiclesontraficcapacitvisconsiderable·Todevelopurbantrafic，attentionshouldbepaidtotheoccupationrateofpublictransitvehic1esandtraIficdevelopmentinahaphazardwayshouldbestrictlyavoided．Keywords：publictransitvehicles，ce

6、llularautomata，capacity,averagevelocityPACC：8220F1．Introductionriodicboundaryconditionsisproposedandtheefectsofbusesandbusbaysarealsoconsidered．ThroughUrbanpublictransportationsystemsplayaverycomputersimulation，theefectoftheaveragetimeforimportantroleinurbantransportationsystems[1】．abustostopa

7、tastationstopontraficflowisalsoYangetalstudiedthecellularautomatonmodelofinvestigatedinthispaper．pedestrianmovementwithconsiderationofpedestrianbehaviour．However．becausepublictransportationvehiclesfeaturefixedtravellinesarrivalanddepar—