ATSSA Traffic Control Supervisor "The Typical
Project" Module 7 Exam Questions with correct
Answers 2024/2025( A+ GRADED 100% VERIFIED).
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)
Recovery Area for errant vehicles: 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 -
ANSWER Longitudinal Buffer Space
Where road users are returned to their normal path
extends from the downstream end of the work area to the last device such as end
work zone sign
May contain:
end work zone sign: usually 500' past last device
downstream taper = 50'-100' per lane - ANSWER Termination Area is:
can contain: (2)
100' - ANSWER Recommended Advanced Warning Sign Spaceing: Urban (low
speed)
350' - ANSWER Recommended Advanced Warning Sign Spaceing: urban (high
speed)
500' - ANSWER Recommended Advanced Warning Sign Spaceing: Rural
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
tangent: distance = double posted speed limit - ANSWER device spacing taper:
tangent:
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn - ANSWER Warning lights types:
Type A:
Type B:
Type C:
Type D:
Uses for portable changeable message sign PCMS - ANSWER speed drops
significant delays
adverse conditions
advance notice of closures
advance notice of road changes
reinforce static signage
updated guidance information
Project" Module 7 Exam Questions with correct
Answers 2024/2025( A+ GRADED 100% VERIFIED).
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)
Recovery Area for errant vehicles: 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 -
ANSWER Longitudinal Buffer Space
Where road users are returned to their normal path
extends from the downstream end of the work area to the last device such as end
work zone sign
May contain:
end work zone sign: usually 500' past last device
downstream taper = 50'-100' per lane - ANSWER Termination Area is:
can contain: (2)
100' - ANSWER Recommended Advanced Warning Sign Spaceing: Urban (low
speed)
350' - ANSWER Recommended Advanced Warning Sign Spaceing: urban (high
speed)
500' - ANSWER Recommended Advanced Warning Sign Spaceing: Rural
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
tangent: distance = double posted speed limit - ANSWER device spacing taper:
tangent:
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn - ANSWER Warning lights types:
Type A:
Type B:
Type C:
Type D:
Uses for portable changeable message sign PCMS - ANSWER speed drops
significant delays
adverse conditions
advance notice of closures
advance notice of road changes
reinforce static signage
updated guidance information
