ATSSA TRAFFIC CONTROL EXAM COMPLETE QUESTIONS
AND 100% VERIFIED ANSWERS LATEST VERSION
1. Q: What does ATSSA stand for? ANSWER American Traffic Safety
Services Association
2. Q: What is the primary purpose of temporary traffic control?
ANSWER To protect workers, road users, and pedestrians in and around
work zones while maintaining traffic flow
3. Q: What is the MUTCD? ANSWER Manual on Uniform Traffic
Control Devices - the federal standard for traffic control devices
4. Q: What are the three basic categories of TTC zones? ANSWER
Short-term stationary, intermediate, and long-term stationary operations
5. Q: What is the minimum cone spacing for highway work zones?
ANSWER Typically varies by speed but generally ranges from 20-50 feet
depending on speed limit and conditions
6. Q: What color are standard traffic cones used in work zones?
ANSWER Orange (Construction orange)
7. Q: What is a warning area? ANSWER The section of highway where
road users are informed about the upcoming work zone
8. Q: What is a transition area? ANSWER The area where road users are
redirected out of their normal path
9. Q: What is the activity area? ANSWER The section of highway where
the work activity takes place
10.Q: What is a termination area? ANSWER The section where traffic is
returned to normal operations
11.Q: What is a buffer space? ANSWER An area that provides protection
for workers and/or road users from errant vehicles
12.Q: What does TTC stand for? ANSWER Temporary Traffic Control
13.Q: What is the minimum height for traffic cones? ANSWER 28
inches for most applications; 36 inches for higher speed roads
,14.Q: What is a taper? ANSWER A longitudinal transition that narrows
the roadway to guide traffic out of or into a closed lane
15.Q: What are the four types of tapers? ANSWER Merging, shifting,
shoulder, and downstream tapers
16.Q: What is the formula for taper length in feet? ANSWER L = WS² /
60 (where L=length, W=width of offset, S=speed limit)
17.Q: What is positive protection? ANSWER Physical barriers that
separate workers from traffic (concrete barriers, crash cushions)
18.Q: What are channelizing devices? ANSWER Devices that warn road
users of conditions on or adjacent to the roadway (cones, drums,
barricades)
19.Q: What is the minimum retroreflectivity requirement for signs?
ANSWER Must meet MUTCD standards for visibility at night from
1,000 feet
20.Q: What does retroreflective mean? ANSWER Material that reflects
light back to its source
21.Q: What is a shadow vehicle? ANSWER A vehicle with impact
attenuator used to protect workers from errant vehicles
22.Q: What is the purpose of a truck-mounted attenuator (TMA)?
ANSWER To absorb impact energy and reduce severity of crashes into
work zones
23.Q: What are the basic colors for traffic control signs? ANSWER
Orange for construction/maintenance, yellow for warning, red for
stop/prohibition, green for guide
24.Q: What is the minimum width for a travel lane in a TTC zone?
ANSWER 10 feet (9 feet may be used for low speeds and short durations)
25.Q: What is flagger training required for? ANSWER To properly
control traffic through work zones using standardized hand signals and
paddles
26.Q: How often should TTC devices be inspected? ANSWER Daily
during daylight hours and after any incident
27.Q: What is the purpose of law enforcement in work zones?
ANSWER To enforce speed limits, enhance worker safety, and manage
traffic flow
, 28.Q: What does NCHRP stand for? ANSWER National Cooperative
Highway Research Program
29.Q: What is the maximum time for short-term stationary operations?
ANSWER Up to one hour
30.Q: What is the key principle of work zone traffic control? ANSWER
Provide clear, positive guidance to drivers through the work zone
Signs and Devices (Questions 31-60)
31.Q: What is the standard shape for a construction sign? ANSWER
Diamond (36x36 inches minimum)
32.Q: What is the "Road Work Ahead" sign? ANSWER A warning sign
alerting drivers to upcoming construction activity
33.Q: What color must flagger paddles be? ANSWER One side STOP
(red background, white letters), other side SLOW (orange background,
black letters)
34.Q: What is the minimum size for a flagger paddle? ANSWER 18
inches wide with 6-inch letters
35.Q: What are Type III barricades used for? ANSWER Full road
closures or to channelize traffic in high-speed areas
36.Q: How many reflective stripes must Type III barricades have?
ANSWER Three alternating orange and white retroreflective stripes
37.Q: What are drums used for? ANSWER Channelizing traffic and
delineating tapers in work zones
38.Q: What is the minimum weight for traffic drums? ANSWER
Sufficient to resist wind and vehicle air turbulence (typically 25-40 lbs
when empty)
39.Q: What are vertical panels used for? ANSWER To guide drivers
through lane transitions and closures
40.Q: What pattern do vertical panels display? ANSWER Alternating
orange and white retroreflective stripes slanting downward at 45 degrees
41.Q: What is an arrow board? ANSWER An electronic message board
that displays arrow patterns to direct traffic
AND 100% VERIFIED ANSWERS LATEST VERSION
1. Q: What does ATSSA stand for? ANSWER American Traffic Safety
Services Association
2. Q: What is the primary purpose of temporary traffic control?
ANSWER To protect workers, road users, and pedestrians in and around
work zones while maintaining traffic flow
3. Q: What is the MUTCD? ANSWER Manual on Uniform Traffic
Control Devices - the federal standard for traffic control devices
4. Q: What are the three basic categories of TTC zones? ANSWER
Short-term stationary, intermediate, and long-term stationary operations
5. Q: What is the minimum cone spacing for highway work zones?
ANSWER Typically varies by speed but generally ranges from 20-50 feet
depending on speed limit and conditions
6. Q: What color are standard traffic cones used in work zones?
ANSWER Orange (Construction orange)
7. Q: What is a warning area? ANSWER The section of highway where
road users are informed about the upcoming work zone
8. Q: What is a transition area? ANSWER The area where road users are
redirected out of their normal path
9. Q: What is the activity area? ANSWER The section of highway where
the work activity takes place
10.Q: What is a termination area? ANSWER The section where traffic is
returned to normal operations
11.Q: What is a buffer space? ANSWER An area that provides protection
for workers and/or road users from errant vehicles
12.Q: What does TTC stand for? ANSWER Temporary Traffic Control
13.Q: What is the minimum height for traffic cones? ANSWER 28
inches for most applications; 36 inches for higher speed roads
,14.Q: What is a taper? ANSWER A longitudinal transition that narrows
the roadway to guide traffic out of or into a closed lane
15.Q: What are the four types of tapers? ANSWER Merging, shifting,
shoulder, and downstream tapers
16.Q: What is the formula for taper length in feet? ANSWER L = WS² /
60 (where L=length, W=width of offset, S=speed limit)
17.Q: What is positive protection? ANSWER Physical barriers that
separate workers from traffic (concrete barriers, crash cushions)
18.Q: What are channelizing devices? ANSWER Devices that warn road
users of conditions on or adjacent to the roadway (cones, drums,
barricades)
19.Q: What is the minimum retroreflectivity requirement for signs?
ANSWER Must meet MUTCD standards for visibility at night from
1,000 feet
20.Q: What does retroreflective mean? ANSWER Material that reflects
light back to its source
21.Q: What is a shadow vehicle? ANSWER A vehicle with impact
attenuator used to protect workers from errant vehicles
22.Q: What is the purpose of a truck-mounted attenuator (TMA)?
ANSWER To absorb impact energy and reduce severity of crashes into
work zones
23.Q: What are the basic colors for traffic control signs? ANSWER
Orange for construction/maintenance, yellow for warning, red for
stop/prohibition, green for guide
24.Q: What is the minimum width for a travel lane in a TTC zone?
ANSWER 10 feet (9 feet may be used for low speeds and short durations)
25.Q: What is flagger training required for? ANSWER To properly
control traffic through work zones using standardized hand signals and
paddles
26.Q: How often should TTC devices be inspected? ANSWER Daily
during daylight hours and after any incident
27.Q: What is the purpose of law enforcement in work zones?
ANSWER To enforce speed limits, enhance worker safety, and manage
traffic flow
, 28.Q: What does NCHRP stand for? ANSWER National Cooperative
Highway Research Program
29.Q: What is the maximum time for short-term stationary operations?
ANSWER Up to one hour
30.Q: What is the key principle of work zone traffic control? ANSWER
Provide clear, positive guidance to drivers through the work zone
Signs and Devices (Questions 31-60)
31.Q: What is the standard shape for a construction sign? ANSWER
Diamond (36x36 inches minimum)
32.Q: What is the "Road Work Ahead" sign? ANSWER A warning sign
alerting drivers to upcoming construction activity
33.Q: What color must flagger paddles be? ANSWER One side STOP
(red background, white letters), other side SLOW (orange background,
black letters)
34.Q: What is the minimum size for a flagger paddle? ANSWER 18
inches wide with 6-inch letters
35.Q: What are Type III barricades used for? ANSWER Full road
closures or to channelize traffic in high-speed areas
36.Q: How many reflective stripes must Type III barricades have?
ANSWER Three alternating orange and white retroreflective stripes
37.Q: What are drums used for? ANSWER Channelizing traffic and
delineating tapers in work zones
38.Q: What is the minimum weight for traffic drums? ANSWER
Sufficient to resist wind and vehicle air turbulence (typically 25-40 lbs
when empty)
39.Q: What are vertical panels used for? ANSWER To guide drivers
through lane transitions and closures
40.Q: What pattern do vertical panels display? ANSWER Alternating
orange and white retroreflective stripes slanting downward at 45 degrees
41.Q: What is an arrow board? ANSWER An electronic message board
that displays arrow patterns to direct traffic
