Exam (elaborations)
ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION (MISSING SOME BASICS)
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ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION (MISSING SOME BASICS)
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ATSSA TRAFFIC CONTROLSUPERVISOR RE-CERTIFICATION
(MISSING SOME BASICS)
L=(WS²)/606for640MPH6or6less,
L=WS6for645MPH6or6more6-6ans--Formula6for6Min.6taper6length
The6off6peak685th6percentile.6Which6is6the6speed6at6or6below6which685%6of6vehicles6trav
el6operating6speed6in6free6flow6conditions6-6ans--speed6used6in6formulas6should6be
125'6-6ans--Distance6of6L6for6256MPH6with612'6Lane6width
245'6-6ans--Distance6of6L6for6356MPH6with612'6Lane6width
540'6-6ans--Distance6of6L6for6456MPH6with612'6Lane6width
660'6-6ans--Distance6of6L6for6556MPH6with612'6Lane6width
780'6-6ans--Distance6of6L6for6656MPH612'6Lane6width
L6Minimum6-6ans--Merging6Taper6Length
1/26L6Minimum6-6ans--Shifting6Taper6Length
1/36L6Minimum6-6ans--Shoulder6Taper6Length
50'-100'6regardless6of6speed
66devices610'-20'6apart6-6ans--One-Lane,6Two-
Way6Taper6(Flagger6taper)6Length6and6number6of6devices
50'-100'6per6lane6-6ans--Downstream6taper6Length
2L6-6ans--Tangent6distance6(between6tapers)
1/2L6-6ans--Tangent6distance6before6shifting6taper
Buffer6Space
, Work6Space
Traffic6Space6-6ans--Activity6Area6Sub-components6(3)
Recovery6Area6for6errant6vehicles:6Forgiving6design
Protects6workers6and6Motorists
Always6completely6empty6or6clear
No6vehicles,6truck-mounted6attenuator,6equipment,6or6materials
STRONGLY6RECOMMENDED:6unless6there6is6a6documented6reason6not6to6-6ans--
Longitudinal6Buffer6Space
Where6road6users6are6returned6to6their6normal6path
extends6from6the6downstream6end6of6the6work6area6to6the6last6device6such6as6end6work6
zone6sign
May6contain:
end6work6zone6sign:6usually6500'6past6last6device
downstream6taper6=650'-100'6per6lane6-6ans--Termination6Area6is:
can6contain:6(2)
100'6-6ans--Recommended6Advanced6Warning6Sign6Spaceing:6Urban6(low6speed)
350'6-6ans--Recommended6Advanced6Warning6Sign6Spaceing:6urban6(high6speed)
500'6-6ans--Recommended6Advanced6Warning6Sign6Spaceing:6Rural
1000',61500',6and62640'6-6ans--
Recommended6Advanced6Warning6Sign6Spaceing:6freeways6and6expressways6(3)
16Mile
50%
shoulder6at6beginning6of6taper6if6possible,6if6not,6as6close6to6beginning6as6possible6inside
6taper.6-6ans--Arrow6board6visibility6distance6by6design:
night6time6dimming:
location:
taper:6not6to6exceed6distance6in6feet6=6to6posted6speed6limit
tangent:6distance6=6double6posted6speed6limit6-6ans--device6spacing6taper:
tangent:
A:6Low6intensity6flashing
B:6High-intensity6flashing
C:6Steady6Burn
D:6360°6steady6burn6-6ans--Warning6lights6types:
Type6A:
Type6B:
Type6C:
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