简介：在全世界高速公路快速发展的今天，政府在其中的职能亦在不断变化和发展。针对我国高速公路迅速发展的状况，应从高速公路规划、融资、施工及营运等方面对政府职责进行界定。

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简介：Objective:Toevaluatetheepidemiologiccharacteristicsofexpresswaytraffictraumain2040casesinZhejiangProvince.Methods:Thedataof2040casesofexpresswaytraffictraumatakenfromZhejiangProvincialExpresswayTrafficBureauwereanalyzedwithcomputertechniques.Results:Atotalof2040personswereinjuredin7963expresswaytrafficaccidentsinZhejiangProvincefromJanuary1999toDecember2001.Amongthem,435personsdied(mortality,21.3%)and1605wereinjured.Theeconomiclosseswereover170millionyuanRMB.Theaccidentscausedbyhumanfactorsaccountedfor84.9%(vehicledriversaccountingfor79.2%),whichmainlyincludedimpropermeasures(20.4%),steeringfailure(17.7%),insufficientlongitudinalspace(15.9%),overspeeddrive(12.5%),fatiguedrive(6.4%),loadingviolation(5.9%)andcarelessdrive(6.3%).Mechanicaltroublesandotherfactorstookup15.1%.Thereexistedobviousunevendistributionamongvariousregions.JiaxingandShaoxingwerethesectionswithhighincidenceofaccidents.Theaccidentsmostlyhappenedat12:00-18:00,butthecausing-deadonesmostconcentratedat0:00-6:00.Themainvictimswereyoungandmiddle-agedpeople(accountingfor72.3%),butaccident-strickenchildrenandelderlypersons(over70yearsold)tookuphighermortalities(30.2%and40.7%,respectively).Conclusions:Thenumberofexpresswaytrafficaccidentsandtheeconomiclossesareincreasingyearbyyear,withobviousunevendistributionatdifferentplaces,differenttimeandunderdifferentweatherconditions.Toreducetheaccidentfrequency,itisimportanttostrengthentheenforcementoftrafficregulation,tobalancethesystemof'person-vehicle-road',andtoimprovethesafetyconsciousnessofpeople.

简介：也许你渴望极速的刺激，也许你神往风驰电掣的异样冲动。但请牢记——高速公路驾车切勿疏乎大意！

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简介：Inthethree-phasetrafficflowstudies,thetrafficflowcharacteristicatthebottlenecksectionisahotspotintheacademicfield.Thecontroversyaboutthecharacteristicsofthesynchronizedflowatbottleneckisalsothemaincontradictionbetweenthethree-phasetrafficflowtheoryandthetraditionaltrafficflowtheory.Undertheframeworkofthree-phasetrafficflowtheory,thispapertakestheon-rampasanexampletodiscussthetrafficflowcharacteristicsatthebottlenecksection.Inparticular,thispapermainlyconductsthemicro-analysistotheeffectoflanechangeunderthetwolaneconditions,aswellastheeffectoftheon-ramponthemainlinetrafficflow.Itisfoundthatwhenthemainroadflowislow,thegreatertheon-rampinflowrate,thehighertheaveragespeedofthewholeroadsection.Astheprobabilityofvehiclesenteringfromtheon-rampincreases,theflowandtheaveragespeedofthemainroadaregraduallystabilized,andthentheon-rampinflowvehiclesnolongerhaveasignificantimpactonthetrafficflow.Inaddition,thispaperfocusesonthevelocitydisturbancegeneratedattheon-ramp,andproposesthecorrespondingon-rampcontrolstrategybasedonit,andthesimulationverifiedthatthecontrolstrategycanreasonablycontrolthetrafficflowbytheon-ramp,whichcanmeetthecontrolstrategyrequirementstosomeextent.