ATSSA Traffic Control Supervisor Re- certification (missing some basics)
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Course
ATSSA Traffic Control Supervisor
Institution
ATSSA Traffic Control Supervisor
ATSSA Traffic Control Supervisor Re-
certification (missing some basics)
L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - answerFormula 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...
ATSSA Traffic Control Supervisor Re-
certification (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
780' - answer✔✔Distance of L for 65 MPH 12' Lane width
L Minimum - answer✔✔Merging Taper Length
1/2 L Minimum - answer✔✔Shifting Taper Length
1/3 L Minimum - answer✔✔Shoulder Taper Length
50'-100' regardless of speed
6 devices 10'-20' apart - answer✔✔One-Lane, Two-Way Taper (Flagger taper) Length and
number of devices
50'-100' per lane - answer✔✔Downstream taper Length
2L - answer✔✔Tangent distance (between tapers)
1/2L - answer✔✔Tangent distance before shifting taper
Buffer Space
Work Space
Traffic Space - answer✔✔Activity Area Sub-components (3)
1000', 1500', and 2640' - answer✔✔Recommended Advanced Warning Sign Spaceing: freeways
and expressways (3)
1 Mile
50%
shoulder at beginning of taper if possible, if not, as close to beginning as possible inside taper. -
answer✔✔Arrow board visibility distance by design:
night time dimming:
location:
taper: not to exceed distance in feet = to posted speed limit
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