6/20/25, 6:52 AM ATSSA Traffic Control Supervisor Re-certification (missing some basics) 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUEN…
ATSSA Traffic Control Supervisor Re-certification (missing
some basics) 2025 COMPREHENSIVE EXAM QUESTIONS
|FREQUENTLY TESTED QUESTIONS |RECENTLY TESTING
REAL EXAM QUESTIONS|VERIFIED SOLUTIONS (100%
ACCURATE
L=(WS²)/60 for 40MPH Formula for Min. taper length
or less, L=WS for
45MPH or more
The off peak 85th speed used in formulas should be
percentile. Which 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
1/3 L Minimum Shoulder Taper Length
50'-100' regardless One-Lane, Two-Way Taper (Flagger taper) Length and number of
of speed 6 devices devices
10'-20' apart
50'-100' per lane Downstream taper Length
2L Tangent distance (between tapers)
1/2L Tangent distance before shifting taper
t… 1/6
, 6/20/25, 6:52 AM ATSSA Traffic Control Supervisor Re-certification (missing some basics) 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUEN…
Buffer Activity Area Sub-components (3)
Space
Work
Space
Traffic
Space
Recovery Area for Longitudinal Buffer Space
errant vehicles:
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 Termination
returned to their normal
path Area is: can
extends from the
downstream end of the contain: (2)
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
100' Recommended Advanced Warning Sign Spaceing: Urban (low
speed)
350' Recommended Advanced Warning Sign Spaceing: urban (high
speed)
500' Recommended Advanced Warning Sign Spaceing: Rural
1000', 1500', and 2640' Recommended Advanced Warning Sign Spaceing: freeways and
expressways (3)
t… 2/6
ATSSA Traffic Control Supervisor Re-certification (missing
some basics) 2025 COMPREHENSIVE EXAM QUESTIONS
|FREQUENTLY TESTED QUESTIONS |RECENTLY TESTING
REAL EXAM QUESTIONS|VERIFIED SOLUTIONS (100%
ACCURATE
L=(WS²)/60 for 40MPH Formula for Min. taper length
or less, L=WS for
45MPH or more
The off peak 85th speed used in formulas should be
percentile. Which 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
1/3 L Minimum Shoulder Taper Length
50'-100' regardless One-Lane, Two-Way Taper (Flagger taper) Length and number of
of speed 6 devices devices
10'-20' apart
50'-100' per lane Downstream taper Length
2L Tangent distance (between tapers)
1/2L Tangent distance before shifting taper
t… 1/6
, 6/20/25, 6:52 AM ATSSA Traffic Control Supervisor Re-certification (missing some basics) 2025 COMPREHENSIVE EXAM QUESTIONS |FREQUEN…
Buffer Activity Area Sub-components (3)
Space
Work
Space
Traffic
Space
Recovery Area for Longitudinal Buffer Space
errant vehicles:
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 Termination
returned to their normal
path Area is: can
extends from the
downstream end of the contain: (2)
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
100' Recommended Advanced Warning Sign Spaceing: Urban (low
speed)
350' Recommended Advanced Warning Sign Spaceing: urban (high
speed)
500' Recommended Advanced Warning Sign Spaceing: Rural
1000', 1500', and 2640' Recommended Advanced Warning Sign Spaceing: freeways and
expressways (3)
t… 2/6
