ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION ACTUAL 2026 QUESTIONS AND VERIFIED ANSWERS

ATSSA TRAFFIC CONTROL SUPERVISOR RE-
CERTIFICATION ACTUAL 2026 QUESTIONS AND
VERIFIED ANSWERS

Save




Terms in this set (53)



L=(WS²)/60 for 40MPH or less, Formula for Min. taper length
L=WS for 45MPH or more


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


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


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 One-Lane, Two-Way Taper (Flagger taper) Length
6 devices 10'-20' apart and number of devices


50'-100' per lane Downstream taper Length




2L Tangent distance (between tapers)


1/2L Tangent distance before shifting taper


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


Recovery Area for errant vehicles: Longitudinal Buffer Space
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