交通工程总结范文.doc

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1、交通工程总结范文　　交通工程总结PartOne—DefinethefollowingtermsHeadway（车头时距）isdefinedasthetimeintervalbetweensuessivevehiclesastheypassapointalongthelane，alsomeasuredbetweenmonreferencepointsonthevehicles.PeakHourFactor（高峰小时系数）Therelationshipbetweenthehourlyvolumeandthemaximumrateofflowwithinthehourisdefinedbythe

2、peakhourfactor(PHF).PHF=错误！未找到引用源。　　HourlyVolumeMaxRateofFlowPerception-reactiontime(PRT)(反应时间):fromstartofperceptiontotheendofreaction(2.5secondisverymon);itvariesgreatlyfrompersontoperson，fromsituationtosituation.Capacity:MaximumHourlyRateatwhichpersonsorvehiclescantraverseapointorauniformsectio

3、nofalaneorroadwayduringagiventimeperiodunderprevailingroadway，trafficandcontrolconditions.Gapaeptance:isdefinedasthedistancebetweenthepedestrianandtheapproachingvehicleatthetimethepedestrianbeginhisorhercrossing.Spacing(车头间距)isdefinedasthedistancebetweensuessivevehiclesinatrafficlane，measuredfroms

4、omemonreferencepointonthevehicles，suchasthefrontbumperorfrontwheels.Levelofservice(服务水平):isaqualitymeasuredescribingoperationalconditionswithinatrafficstream，generallyintermsofsuchservicemeasuresasspeedandtraveltime，freedomtomaneuver，trafficinterruptions，andfortandconvenience.Percentileavalueinadi

5、stributionforwhichthestatedpercentageofthepopulationhasacharacteristicsthatislessthanorequaltothespecifiedvalue.PCU(passengercarunits)aunitofmeasurewherebylargetrucksandturningmovementsareconvertedtopassengercarsusingmultiplicationfactors.TotalstoppingdistanceThesumofthereactiondistanceandthebraki

6、ngdistance.TDM:istheapplicationofstrategiesandpoliciestoreducetraveldemand(specificallythatofsingle-oupancyprivatevehicles),ortoredistributethisdemandinspaceorintime.TSMisaprocessforplanningandoperatingaunitarysystemofurbantransportation.Delayisdefinedas“theaddiionaltraveltimeexperiencedbyadriver,

7、passengerorpedestrian”andwithrespecttofieldmeasurements,it’sthedifferenceintraveltimewhenavehicleisunaffectedbythecontrolledintersectionortrafficincidentsandwhenavehicleisaffectedbythecontrolledintersectionortraf