ATSSA Traffic Control Supervisor Re-certification (missing some basics)

ATSSA TRAFFIC CONTROL
SUPERVISOR RE-CERTIFICATION
(MISSING SOME BASICS) QUESTIONS
WITH CORRECT ANSWERS
L=(WS²)/60kfork40MPHkorkless,

L=WSkfork45MPHkorkmore k-kCORRECTkANSWER-FormulakforkMin.ktaperklength



The koff kpeakk85thkpercentile.kWhichkiskthekspeedkatkorkbelowkwhichk85%kof kvehiclesktravel koperatingkspee
dkinkfree kflowkconditionsk-kCORRECTkANSWER-speedkusedkinkformulaskshouldkbe



125'k-kCORRECTkANSWER-Distance kof kLkfork25kMPHkwithk12'kLane kwidth



245'k-kCORRECTkANSWER-Distance kof kLkfork35kMPHkwithk12'kLane kwidth



540'k-kCORRECTkANSWER-Distance kof kLkfork45kMPHkwithk12'kLane kwidth



660'k-kCORRECTkANSWER-Distance kof kLkfork55kMPHkwithk12'kLane kwidth



780'k-kCORRECTkANSWER-Distance kof kLkfork65kMPHk12'kLane kwidth



LkMinimumk-kCORRECTkANSWER-MergingkTaperkLength



1/2kLkMinimumk-kCORRECTkANSWER-ShiftingkTaperkLength



1/3kLkMinimumk-kCORRECTkANSWER-ShoulderkTaperkLength



50'-100'kregardlesskofkspeed

, 6kdevicesk10'-20'kapartk-kCORRECTkANSWER-One-Lane,kTwo-
WaykTaperk(Flaggerktaper)kLengthkandknumberkofkdevices



50'-100'kperklane k-kCORRECTkANSWER-DownstreamktaperkLength



2Lk-kCORRECTkANSWER-Tangentkdistance k(betweenktapers)



1/2Lk-kCORRECTkANSWER-Tangentkdistancekbefore kshiftingktaper



BufferkSpace

WorkkSpace

TraffickSpace k-kCORRECTkANSWER-ActivitykAreakSub-componentsk(3)



RecoverykAreakforkerrantkvehicles:kForgivingkdesign

ProtectskworkerskandkMotorists

Alwayskcompletelykemptykorkclear

Nokvehicles,ktruck-mountedkattenuator,kequipment,korkmaterials

STRONGLYkRECOMMENDED:kunlessktherekiskakdocumentedkreasonknotktok-kCORRECTkANSWER-
Longitudinal kBufferkSpace



Where kroadkuserskarekreturnedktoktheirknormalkpath

extendskfromkthekdownstreamkendkof kthe kworkkareaktokthe klastkdeviceksuchkaskendkworkkzoneksign

Maykcontain:

endkworkkzoneksign:kusuallyk500'kpastklastkdevice

downstreamktaperk=k50'-100'kperklane k-kCORRECTkANSWER-TerminationkAreakis:



cankcontain:k(2)



100'k-kCORRECTkANSWER-RecommendedkAdvancedkWarningkSignkSpaceing:kUrbank(lowkspeed)