SUPERVISOR RE-CERTIFICATION
(MISSING SOME BASICS) EXAM
QUESTIONS AND ANSWERS
L=(WS²)/60RforR40MPHRorRless,
L=WSRforR45MPHRorRmoreR-RCORRECTRANSWERS-FormulaRforRMin.RtaperRlength
TheRoffRpeakR85thRpercentile.RWhichRisRtheRspeedRatRorRbelowRwhichR85%RofRvehiclesRtravelRoperatingRspe
edRinRfreeRflowRconditionsR-RCORRECTRANSWERS-speedRusedRinRformulasRshouldRbe
125'R-RCORRECTRANSWERS-DistanceRofRLRforR25RMPHRwithR12'RLaneRwidth
245'R-RCORRECTRANSWERS-DistanceRofRLRforR35RMPHRwithR12'RLaneRwidth
540'R-RCORRECTRANSWERS-DistanceRofRLRforR45RMPHRwithR12'RLaneRwidth
660'R-RCORRECTRANSWERS-DistanceRofRLRforR55RMPHRwithR12'RLaneRwidth
780'R-RCORRECTRANSWERS-DistanceRofRLRforR65RMPHR12'RLaneRwidth
LRMinimumR-RCORRECTRANSWERS-MergingRTaperRLength
1/2RLRMinimumR-RCORRECTRANSWERS-ShiftingRTaperRLength
1/3RLRMinimumR-RCORRECTRANSWERS-ShoulderRTaperRLength
50'-100'RregardlessRofRspeed
6RdevicesR10'-20'RapartR-RCORRECTRANSWERS-One-Lane,RTwo-
WayRTaperR(FlaggerRtaper)RLengthRandRnumberRofRdevices
50'-100'RperRlaneR-RCORRECTRANSWERS-DownstreamRtaperRLength
2LR-RCORRECTRANSWERS-TangentRdistanceR(betweenRtapers)
1/2LR-RCORRECTRANSWERS-TangentRdistanceRbeforeRshiftingRtaper
BufferRSpace
WorkRSpace
TrafficRSpaceR-RCORRECTRANSWERS-ActivityRAreaRSub-componentsR(3)
RecoveryRAreaRforRerrantRvehicles:RForgivingRdesign
ProtectsRworkersRandRMotorists
AlwaysRcompletelyRemptyRorRclear
NoRvehicles,Rtruck-mountedRattenuator,Requipment,RorRmaterials
STRONGLYRRECOMMENDED:RunlessRthereRisRaRdocumentedRreasonRnotRtoR-RCORRECTRANSWERS-
LongitudinalRBufferRSpace
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