ATSSA Traffic Control Supervisor Re-Certification Exam Questions and Answers (Latest 2026)

ATSSA Traffic Control Supervisor Re-
Certification Exam Questions and
Answers (Latest 2026)
L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - Correct Answers ✅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 - Correct Answers ✅speed used in formulas
should be


125' - Correct Answers ✅Distance of L for 25 MPH with 12'
Lane width


245' - Correct Answers ✅Distance of L for 35 MPH with 12'
Lane width


540' - Correct Answers ✅Distance of L for 45 MPH with 12'
Lane width


660' - Correct Answers ✅Distance of L for 55 MPH with 12'
Lane width


780' - Correct Answers ✅Distance of L for 65 MPH 12' Lane
width

, ATSSA Traffic Control Supervisor Re-
Certification Exam Questions and
Answers (Latest 2026)
L Minimum - Correct Answers ✅Merging Taper Length


1/2 L Minimum - Correct Answers ✅Shifting Taper Length


1/3 L Minimum - Correct Answers ✅Shoulder Taper Length


50'-100' regardless of speed
6 devices 10'-20' apart - Correct Answers ✅One-Lane, Two-
Way Taper (Flagger taper) Length and number of devices


50'-100' per lane - Correct Answers ✅Downstream taper
Length


2L - Correct Answers ✅Tangent distance (between tapers)


1/2L - Correct Answers ✅Tangent distance before shifting
taper


Buffer Space
Work Space
Traffic Space - Correct Answers ✅Activity Area Sub-
components (3)