ATSSA Traffic Control
Supervisor Re-certification /
ATSSA Traffic Control
Supervisor Re-certification
100% VERIFIED ANSWERS
2023/2025
(missing some basics)
L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - ANSWER-Formula for Min.
taper length
The off peak 85th percentile. Which is t...
ATSSA Traffic Control
Supervisor Re-certification /
ATSSA Traffic Control
Supervisor Re-certification
100% VERIFIED ANSWERS
2023/2025
(missing some basics)
, L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - ✔✔✔ANSWER-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 - ✔✔✔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
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