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actuatedsignal感应信号approachdelay慢行延误averageannualdailytraffic,AADT年平均日交通量averageannualweekdaytraffic,AAWT年平均工作日交通量controldelay控制延误criticaldensity临界密度criticalspeed临界速度curb路缘带curbparking路边停车dailyvolume日交通量delay延误designHourlyVolume,DHV设计小时交通量directionaldesignhourvolume,DDHV有方向性的设计小时交通量dischargeheadway饱和车头时距driveway私人车道DWI(drivingwhileintoxicated)醉酒驾驶fatality死亡率FFS:free-flowspeed自由流速度fieldofvision视野floatingcar浮动车forcedflow强制流headway车头间距 accessibility可达性Accidentrate:事故率actuatedsignal感应信号angleparking角度停车approach入口approachdelay固定延误averageannualdailytraffic，AADT年平均日交通量averageannualweekdaytraffic，AAWT年平均工作日交通量Bottleneck瓶颈路段Capacity通行能力controldelay控制延误criticaldensity临界密度criticalspeed临界速度curbparking路边停车curbparking路边停车curbsetback转弯车道前的渐变区dailytraffic日交通量decisionsightdistance决策视距delay延误DesignHourlyVolume,DHV设计小时交通量destination讫点directionaldesignhourvolume(DDHV)有方向性的设计小时交通量DischargeHeadway饱和车头时距diverging分流downgrade下坡driveway私人车道DUI(drivingundertheinfluence)饮酒驾驶fatality死亡人数Fatalityrate:死亡率FFS:free-flowspeed自由流速度fieldofvision视野floatingcar流动车Forcedflow强制流Freeway高速公路fullcontrolofaccess全控制出入FVS:fractionofvehiclesstopping停驶车辆比例gapacceptance可接受间隙Gapacceptance可接受间隙grade坡度headway:车头时距HighOccupancyVehicle(HOV)Lane高乘载车道Highway公路horizontalcurve平曲线hourlyvolume小时交通量interchange互通式立体交叉Interruptedflow间断流Intersection平面交叉口intersectioncurb交叉口路缘带，即交叉口的右转车道jamdensity阻塞密度jamdensity阻塞密度Lane车道lanegroup车道组Level-of-Service:LOS服务水平localtraffic境内交通marking标线median隔离带mergearea合流区merging合流mobility通畅性motorvehicle机动车motorcycle摩托车occupancy占有率off-streetgarage路外停车库off-streetlot路外停车场On-Ramp入口匝道on-streetlot路边停车场origin起点overheadclearance净空高度parallelparking平行停车parkingaccumulation累积停车数parkingduration停车时间parkinglot停车场parkingturnoverrate,TR停车周转率passingsightdistance超车视距PDO：propertydamageonly只有财损peakhour高峰小时peakhourvolume，PHV高峰小时交通量peakerhourfactor(PHF)高峰小时系数Pedestrian行人pedestriancrossing人行横道perception-reactiontime[PRT]知觉反应时间platoonofvehicle车队publictransit公共交通系统public Transportation公共交通系统ramp匝道rateofflow，flowrate流率redphase红灯相位reversiblelane可逆车道Road路,道路常指城市或乡村之间可供车辆或行人通过的宽阔而又平坦的大路runningtime行驶时间samplingtechnique点样本法section路段section路段shouler路肩sightdistance视距SignalTiming信号配时SignalizedIntersections信号交叉口Signing标志spacemeanspeed（SMS）区间平均速度spacing车头间距Stableflow稳定流stall车位stopped-timedelay停车延误stoppingsightdistance停车视距Street街,街道主要是指村落或都市中两边有房屋的街道或马路superelevation超高testcar测试车throughtraffic过境交通timemeanspeed（TMS）时间平均速度tollplaza收费广场Trafficcount交通量调查Trafficengineering交通工程学trafficstream交通流trafficvolume,traffic,volume交通量Transportationengineering交通运输工程学Traveltime行程时间travel-timedelay行程时间延误Trip出行turningroadway转弯车道uninterruptedflow连续流UnsignalzedIntersections无信号交叉口Unstableflow不稳定流upgrade上坡VehicleOccupancy车辆满载率vehicle-milestraveled,VMT车辆里程数verticalcurve竖曲线VMT：vehicle-milestraveled车辆里程数weaving交织YIELDsign让行标志路,道路常指城市或乡村之间可供车辆或行人通过的宽阔而又平坦的大路街,街道主要是指村落或都市中两边有房屋的街道或马路