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ATSSA TRAFFIC CONTRO L
SUPERVISOR RE-CERTIFICATION
QUESTIONS WITH CORRE CT
ANSWERS
Question : Warning lights types:
A: Low intensity flashing
Correct answer: Type A: Low intensity flashing
Question : Warning lights types:
B: High-intensity flashing
Correct answer: Type B: High-intensity flashing
Question : Warning lights types:
C: Steady Burn
Correct answer: Type C: Steady Burn
Question : Warning lights types:
D: 360° steady burn
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Correct answer: Type D: 360° steady burn
Question : Formula for Min. taper length
Correct answer: L=(WS²)/60 for 40MPH or less, L=WS for
45MPH or more
Question : speed used in formulas should be
Correct answer: The off peak 85th percentile. Which is the
speed at or below which 85% of vehicles travel operating speed in free flow conditions
Question : Distance of L for 25 MPH with 12' Lane width
Correct answer: 125'
Question : Distance of L for 35 MPH with 12' Lane width
Correct answer: 245'
Question : Distance of L for 45 MPH with 12' Lane width
Correct answer: 540'
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Question : Distance of L for 55 MPH with 12' Lane width
Correct answer: 660'
Question : Distance of L for 65 MPH 12' Lane width
Correct answer: 780'
Question : Merging Taper Length
Correct answer: L Minimum
Question : Shifting Taper Length
Correct answer: 1/2 L Minimum
Question : Shoulder Taper Length
Correct answer: 1/3 L Minimum
Question : One-Lane, Two-Way Taper (Flagger taper) Length
and number of devices
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Correct answer: 50'-100' regardless of speed 6 devices 10'-20'
apart
Question : Downstream taper Length
Correct answer: 50'-100' per lane
Question : Tangent distance (between tapers)
Correct answer: 2L
Question : Tangent distance before shifting taper
Correct answer: 1/2L
Question : Activity Area Sub-components (3)
Correct answer: Buffer Space Work Space Traffic Space
Question : Longitudinal Buffer Space
Correct answer: Recovery Area for errant vehicles: Forgiving design Protects workers and Motorists Always completely empty or clear No vehicles, truck-mounted attenuator,