ATSSA TRAFFIC CONTROL SUPERVISOR RECERTIFICATION EXAM QUESTIONS WITH CORRECT ANSWERS 2026

ATSSA TRAFFIC CONTROL SUPERVISOR
RECERTIFICATION EXAM QUESTIONS WITH
CORRECT ANSWERS 2026

◉ The off peak 85th percentile. Which is the speed at or below
which 85% of vehicles travel operating speed in free flow conditions.
Answer: speed used in formulas should be


◉ 125'. Answer: Distance of L for 25 MPH with 12' Lane width


◉ 245'. Answer: Distance of L for 35 MPH with 12' Lane width


◉ 540'. Answer: Distance of L for 45 MPH with 12' Lane width


◉ 660'. Answer: Distance of L for 55 MPH with 12' Lane width


◉ 780'. Answer: Distance of L for 65 MPH 12' Lane width


◉ L Minimum. Answer: Merging Taper Length


◉ 1/2 L Minimum. Answer: Shifting Taper Length

, ◉ 1/3 L Minimum. Answer: Shoulder Taper Length


◉ 50'-100' Regardless Of Speed
6 Devices 10'-20' Apart. Answer: One-Lane, Two-Way Taper (Flagger
Taper) Length And Number Of Devices


◉ 50'-100' Per Lane. Answer: Downstream Taper Length


◉ 2l. Answer: Tangent Distance (Between Tapers)


◉ 1/2l. Answer: Tangent Distance Before Shifting Taper


◉ Buffer Space
Work Space
Traffic Space. Answer: Activity Area Sub-Components (3)


◉ 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. Answer: Longitudinal Buffer Space