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)
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)
