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1、PartOne—DefinethefollowingtermsHeadway（車頭時距）：isdefinedasthetimeintervalbetweensuccessivevehiclesastheypassapointalongthelane,alsomeasuredbetweencommonreferencepointsonthevehicles?HourlyVolumeMaxRateofFlowPeakHourFactor（高峰小時系數(shù)）：Therelationshipbetweenthehourlyvolumeandthema
2、ximumrateofflowwithinthehourisdefinedbythepeakhourfactor（PHF）.PHF=Perception-reactiontime（PRT）（反應(yīng)時間）：fromstartofperceptiontotheendofreaction（2.5secondisverycommon）;itvariesgreatlyfrompersontoperson,fromsituationtosituation?Capacity:MaximumHourlyRateatwhichpersonsorvehicle
3、scantraverseapointorauniformsectionofalaneorroadwayduringagiventimeperiodunderprevailingroadway,trafficandcontrolconditions.Gapacceptance:isdefinedasthedistancebetweenthepedestrianandtheapproachingvehicleatthetimethepedestrianbeginhisorhercrossing.Spacing（車頭間距）：isdefineda
4、sthedistancebetweensuccessivevehiclesinatrafficlane,measuredfromsomecommonreferencepointonthevehicles,suchasthefrontbumperorfrontwheels.Levelofservice（服務(wù)水平）:isaqualitymeasuredescribingoperationalconditionswithinatrafficstream,generallyintermsofsuchservicemeasuresasspeedan
5、dtraveltime,freedomtomaneuver,trafficinterruptions,andcomfortandconvenience.Percentile：avalueinadistributionforwhichthestatedpercentageofthepopulationhasacharacteristicsthatislessthanorequaltothespecifiedvalue?PCU（passengercarunits）：aunitofmeasurewherebylargetrucksandturn
6、ingmovementsarcconvertedtopassengercarsusingmultiplicationfactors?=0?278S」+254.28（F±%G）Totalstoppingdistance：Thesumofthereactiondistanceandthebrakingdistance.TDM:istheapplicationofstrategiesandpoliciestoreducetraveldemand（specificallythatofsingle-occupancyprivatevehicles）
7、,ortoredistributethisdemandinspaceorintime.TSM：isaprocessforplanningandoperatingaunitarysystemofurbantransportation.Delay：isdefinedas“theaddiionaltraveltimeexperiencedbyadriver,passengerorpedestrian^andwithrespecttofieldmeasurements,it'sthedifferenceintraveltimewhenavehic
8、leisunaffectedbythecontrolledintersectionortrafficincidentsandwhenavehicleisaffectedbythecontrol
