©THESTAR 2025 ALL RIGHTS RESERVED 2:58 PM A+
ATSSA Traffic Control Supervisor Re-
certification (missing some basics) Exam
Questions And Answers |Latest 2025 |
Guaranteed Pass
Formula for Min. taper length - Answer✔L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more
speed used in formulas should be - Answer✔The off peak 85th percentile. Which is the speed at
or below which 85% of vehicles travel operating speed in free flow conditions
Distance of L for 25 MPH with 12' Lane width - Answer✔125'
Distance of L for 35 MPH with 12' Lane width - Answer✔245'
Distance of L for 45 MPH with 12' Lane width - Answer✔540'
Distance of L for 55 MPH with 12' Lane width - Answer✔660'
Distance of L for 65 MPH 12' Lane width - Answer✔780'
Merging Taper Length - Answer✔L Minimum
1
, ©THESTAR 2025 ALL RIGHTS RESERVED 2:58 PM A+
Shifting Taper Length - Answer✔1/2 L Minimum
Shoulder Taper Length - Answer✔1/3 L Minimum
One-Lane, Two-Way Taper (Flagger taper) Length and number of devices - Answer✔50'-100'
regardless of speed
6 devices 10'-20' apart
Downstream taper Length - Answer✔50'-100' per lane
Tangent distance (between tapers) - Answer✔2L
Tangent distance before shifting taper - Answer✔1/2L
Activity Area Sub-components (3) - Answer✔Buffer Space
Work Space
Traffic Space
Longitudinal Buffer Space - Answer✔Recovery Area for 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
Termination Area is:
2
ATSSA Traffic Control Supervisor Re-
certification (missing some basics) Exam
Questions And Answers |Latest 2025 |
Guaranteed Pass
Formula for Min. taper length - Answer✔L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more
speed used in formulas should be - Answer✔The off peak 85th percentile. Which is the speed at
or below which 85% of vehicles travel operating speed in free flow conditions
Distance of L for 25 MPH with 12' Lane width - Answer✔125'
Distance of L for 35 MPH with 12' Lane width - Answer✔245'
Distance of L for 45 MPH with 12' Lane width - Answer✔540'
Distance of L for 55 MPH with 12' Lane width - Answer✔660'
Distance of L for 65 MPH 12' Lane width - Answer✔780'
Merging Taper Length - Answer✔L Minimum
1
, ©THESTAR 2025 ALL RIGHTS RESERVED 2:58 PM A+
Shifting Taper Length - Answer✔1/2 L Minimum
Shoulder Taper Length - Answer✔1/3 L Minimum
One-Lane, Two-Way Taper (Flagger taper) Length and number of devices - Answer✔50'-100'
regardless of speed
6 devices 10'-20' apart
Downstream taper Length - Answer✔50'-100' per lane
Tangent distance (between tapers) - Answer✔2L
Tangent distance before shifting taper - Answer✔1/2L
Activity Area Sub-components (3) - Answer✔Buffer Space
Work Space
Traffic Space
Longitudinal Buffer Space - Answer✔Recovery Area for 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
Termination Area is:
2
