5/17/26, 9:31 AM ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION Questions and Answers 2026. Flashcards | Quizlet
ATSSA TRAFFIC CONTROL SUPERVISOR RE-
CERTIFICATION Questions and Answers 2026.
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Terms in this set (53)
L=(WS²)/60 for 40MPH or less, Formula for Min. taper length
L=WS for 45MPH or more
The off peak 85th percentile. Which speed used in formulas should be
is the speed at or below which 85%
of vehicles travel operating speed in
free flow conditions
125' Distance of L for 25 MPH with 12' Lane width
245' Distance of L for 35 MPH with 12' Lane width
540' Distance of L for 45 MPH with 12' Lane width
660' Distance of L for 55 MPH with 12' Lane width
780' Distance of L for 65 MPH 12' Lane width
L Minimum Merging Taper Length
1/2 L Minimum Shifting Taper Length
https://quizlet.com/1181169884/atssa-traffic-control-supervisor-re-certification-questions-and-answers-2026-flash-cards/?new 1/7
, 5/17/26, 9:31 AM ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION Questions and Answers 2026. Flashcards | Quizlet
1/3 L Minimum Shoulder Taper Length
50'-100' regardless of speed One-Lane, Two-Way Taper (Flagger taper) Length
6 devices 10'-20' apart and number of devices
50'-100' per lane Downstream taper Length
2L Tangent distance (between tapers)
1/2L Tangent distance before shifting taper
Buffer Space Activity Area Sub-components (3)
Work Space
Traffic Space
Recovery Area for errant vehicles: Longitudinal Buffer Space
Forgiving design
Protects workers and Motorists
Always completely empty or clear
No vehicles, truck-mounted
attenuator, equipment, or materials
STRONGLY RECOMMENDED: unless
there is a documented reason not to
Where road users are returned to Termination Area is:
their normal path
extends from the downstream end of can contain: (2)
the work area to the last device such
as end work zone sign
May contain:
end work zone sign: usually 500' past
last device
downstream taper = 50'-100' per lane
https://quizlet.com/1181169884/atssa-traffic-control-supervisor-re-certification-questions-and-answers-2026-flash-cards/?new 2/7
ATSSA TRAFFIC CONTROL SUPERVISOR RE-
CERTIFICATION Questions and Answers 2026.
Save Groups
Terms in this set (53)
L=(WS²)/60 for 40MPH or less, Formula for Min. taper length
L=WS for 45MPH or more
The off peak 85th percentile. Which speed used in formulas should be
is the speed at or below which 85%
of vehicles travel operating speed in
free flow conditions
125' Distance of L for 25 MPH with 12' Lane width
245' Distance of L for 35 MPH with 12' Lane width
540' Distance of L for 45 MPH with 12' Lane width
660' Distance of L for 55 MPH with 12' Lane width
780' Distance of L for 65 MPH 12' Lane width
L Minimum Merging Taper Length
1/2 L Minimum Shifting Taper Length
https://quizlet.com/1181169884/atssa-traffic-control-supervisor-re-certification-questions-and-answers-2026-flash-cards/?new 1/7
, 5/17/26, 9:31 AM ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION Questions and Answers 2026. Flashcards | Quizlet
1/3 L Minimum Shoulder Taper Length
50'-100' regardless of speed One-Lane, Two-Way Taper (Flagger taper) Length
6 devices 10'-20' apart and number of devices
50'-100' per lane Downstream taper Length
2L Tangent distance (between tapers)
1/2L Tangent distance before shifting taper
Buffer Space Activity Area Sub-components (3)
Work Space
Traffic Space
Recovery Area for errant vehicles: Longitudinal Buffer Space
Forgiving design
Protects workers and Motorists
Always completely empty or clear
No vehicles, truck-mounted
attenuator, equipment, or materials
STRONGLY RECOMMENDED: unless
there is a documented reason not to
Where road users are returned to Termination Area is:
their normal path
extends from the downstream end of can contain: (2)
the work area to the last device such
as end work zone sign
May contain:
end work zone sign: usually 500' past
last device
downstream taper = 50'-100' per lane
https://quizlet.com/1181169884/atssa-traffic-control-supervisor-re-certification-questions-and-answers-2026-flash-cards/?new 2/7
