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ATSSA Traffic Control Supervisor Re-certification exam questions and correct answers latest 2026

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ATSSA Traffic Control Supervisor Re-certification exam questions and correct answers latest 2026 L=(WS²)/60 for 40MPH or less, L=WS for 45MPH or more Formula for Min. taper length The off peak 85th percentile. Which is the speed at or below which 85% of vehicles travel operating speed in free flow conditions speed used in formulas should be

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ATSSA Traffic Control Supervisor Re-certification
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ATSSA Traffic Control Supervisor Re-certification

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Uploaded on
January 14, 2026
Number of pages
11
Written in
2025/2026
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Exam (elaborations)
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Questions & answers

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  • atssa traffic control supervisor re certification

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ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION
01/14/2026
EXAM




ATSSA Traffic Control Supervisor Re-certification
exam questions and correct answers latest 2026

L=(WS²)/60 for 40MPH or less,

L=WS for 45MPH or more

Formula for Min. taper length




The off peak 85th percentile. Which is the speed at or below which 85% of vehicles travel operating
speed in free flow conditions

speed used in formulas should be




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
1/14/2026




1

, ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION
01/14/2026
EXAM



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 of speed

6 devices 10'-20' apart

One-Lane, Two-Way Taper (Flagger taper) Length and number of devices




50'-100' per lane
1/14/2026




Downstream taper Length



2
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