ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION QUESTIONS WITH COMPLETE SOLUTIONS

Page | 1


ATSSA TRAFFIC CONTROL
SUPERVISOR RE-CERTIFICATION
QUESTIONS WITH COMPLETE
SOLUTIONS


L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - correct 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 - correct answer-speed used in formulas should be




125' - correct answer-Distance of L for 25 MPH with 12' Lane
width




245' - correct answer-Distance of L for 35 MPH with 12' Lane
width

, Page | 2



540' - correct answer-Distance of L for 45 MPH with 12' Lane
width




660' - correct answer-Distance of L for 55 MPH with 12' Lane
width




780' - correct answer-Distance of L for 65 MPH 12' Lane width




L Minimum - correct answer-Merging Taper Length




1/2 L Minimum - correct answer-Shifting Taper Length




1/3 L Minimum - correct answer-Shoulder Taper Length




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