Arkansas AR-TS Traffic Signal
Contractor Practice Exam |
Questions, Verified Answers &
Detailed Rationales | Complete
Contractor License Exam Prep
Study Guide | Updated 2026
1. What is the primary purpose of a traffic signal?
A. Increase vehicle speeds
B. Eliminate all traffic congestion
C. Regulate conflicting traffic movements and improve
safety
D. Provide roadway lighting
Correct Answer: Regulate conflicting traffic movements
and improve safety
Rationale: Traffic signals assign right-of-way to
conflicting movements and are intended to improve the
orderly and safe movement of traffic and pedestrians.
2. Which organization publishes the Manual on Uniform
Traffic Control Devices (MUTCD)?
A. OSHA
B. EPA
C. FHWA
D. Federal Highway Administration (FHWA)
Correct Answer: Federal Highway Administration (FHWA)
Rationale: The FHWA publishes the MUTCD, which
establishes national standards and guidance for traffic
control devices.
3. What is the normal sequence of a three-section traffic
signal when operating normally?
,A. Green, red, yellow
B. Yellow, red, green
C. Green, yellow, red
D. Red, green, yellow
Correct Answer: Green, yellow, red
Rationale: A typical movement proceeds from green to
yellow and then to red before the conflicting movement
receives green.
4. What is the primary function of a traffic signal
controller?
A. Supply utility power to the intersection
B. Detect pedestrians only
C. Control the timing and sequence of signal indications
D. Support the signal heads
Correct Answer: Control the timing and sequence of
signal indications
Rationale: The controller processes programmed timing
and detector inputs to operate the signal phases.
5. Which device is commonly used to detect vehicles
through pavement-mounted loops?
A. Photoelectric cell
B. Inductive loop detector
C. Pedestrian pushbutton
D. Flashing beacon
Correct Answer: Inductive loop detector
Rationale: An inductive loop detects changes in
electromagnetic characteristics caused by vehicles
passing over or stopping above the loop.
6. What is the purpose of a pedestrian pushbutton?
A. Change the traffic signal cabinet voltage
B. Place a pedestrian call into the controller
,C. Detect vehicle speed
D. Operate street lighting
Correct Answer: Place a pedestrian call into the
controller
Rationale: Pressing the button requests pedestrian
service when pedestrian timing is actuated.
7. What does a green arrow normally indicate?
A. Pedestrians have exclusive right-of-way
B. Traffic must stop
C. A protected movement is permitted in the arrow
direction
D. The signal is malfunctioning
Correct Answer: A protected movement is permitted in
the arrow direction
Rationale: A green arrow provides a specific movement
indication and, when used for a protected movement,
separates that movement from conflicting traffic.
8. What is the purpose of an all-red interval?
A. Increase vehicle speed
B. Provide additional green time
C. Allow vehicles already in the intersection to clear
before conflicting traffic proceeds
D. Test pedestrian equipment
Correct Answer: Allow vehicles already in the
intersection to clear before conflicting traffic proceeds
Rationale: An all-red clearance interval can provide a
safety buffer between conflicting phases.
9. What is a yellow change interval intended to do?
A. Tell drivers to accelerate
B. Warn approaching drivers that the green indication is
ending and the red indication is coming
, C. Allow pedestrians to start crossing
D. Shut down the controller
Correct Answer: Warn approaching drivers that the
green indication is ending and the red indication is
coming
Rationale: Yellow provides a transition between the
permissive green indication and the required stop
condition of red.
10. What type of signal operation responds to vehicle or
pedestrian detection?
A. Fixed-time
B. Actuated
C. Manual-only
D. Flashing-only
Correct Answer: Actuated
Rationale: Actuated operation changes phase service
based on detector or pedestrian inputs.
11. What is a fully actuated signal?
A. A signal with no detectors
B. A signal controlled entirely by a clock
C. A signal with detection influencing phases on the
approaches being controlled
D. A signal that only serves pedestrians
Correct Answer: A signal with detection influencing
phases on the approaches being controlled
Rationale: Fully actuated operation uses detector inputs
to influence phase calls and timing.
12. What is a semi-actuated signal?
A. A signal with no controller
B. A signal where selected approaches or movements
are actuated while other phases may operate without
detection
Contractor Practice Exam |
Questions, Verified Answers &
Detailed Rationales | Complete
Contractor License Exam Prep
Study Guide | Updated 2026
1. What is the primary purpose of a traffic signal?
A. Increase vehicle speeds
B. Eliminate all traffic congestion
C. Regulate conflicting traffic movements and improve
safety
D. Provide roadway lighting
Correct Answer: Regulate conflicting traffic movements
and improve safety
Rationale: Traffic signals assign right-of-way to
conflicting movements and are intended to improve the
orderly and safe movement of traffic and pedestrians.
2. Which organization publishes the Manual on Uniform
Traffic Control Devices (MUTCD)?
A. OSHA
B. EPA
C. FHWA
D. Federal Highway Administration (FHWA)
Correct Answer: Federal Highway Administration (FHWA)
Rationale: The FHWA publishes the MUTCD, which
establishes national standards and guidance for traffic
control devices.
3. What is the normal sequence of a three-section traffic
signal when operating normally?
,A. Green, red, yellow
B. Yellow, red, green
C. Green, yellow, red
D. Red, green, yellow
Correct Answer: Green, yellow, red
Rationale: A typical movement proceeds from green to
yellow and then to red before the conflicting movement
receives green.
4. What is the primary function of a traffic signal
controller?
A. Supply utility power to the intersection
B. Detect pedestrians only
C. Control the timing and sequence of signal indications
D. Support the signal heads
Correct Answer: Control the timing and sequence of
signal indications
Rationale: The controller processes programmed timing
and detector inputs to operate the signal phases.
5. Which device is commonly used to detect vehicles
through pavement-mounted loops?
A. Photoelectric cell
B. Inductive loop detector
C. Pedestrian pushbutton
D. Flashing beacon
Correct Answer: Inductive loop detector
Rationale: An inductive loop detects changes in
electromagnetic characteristics caused by vehicles
passing over or stopping above the loop.
6. What is the purpose of a pedestrian pushbutton?
A. Change the traffic signal cabinet voltage
B. Place a pedestrian call into the controller
,C. Detect vehicle speed
D. Operate street lighting
Correct Answer: Place a pedestrian call into the
controller
Rationale: Pressing the button requests pedestrian
service when pedestrian timing is actuated.
7. What does a green arrow normally indicate?
A. Pedestrians have exclusive right-of-way
B. Traffic must stop
C. A protected movement is permitted in the arrow
direction
D. The signal is malfunctioning
Correct Answer: A protected movement is permitted in
the arrow direction
Rationale: A green arrow provides a specific movement
indication and, when used for a protected movement,
separates that movement from conflicting traffic.
8. What is the purpose of an all-red interval?
A. Increase vehicle speed
B. Provide additional green time
C. Allow vehicles already in the intersection to clear
before conflicting traffic proceeds
D. Test pedestrian equipment
Correct Answer: Allow vehicles already in the
intersection to clear before conflicting traffic proceeds
Rationale: An all-red clearance interval can provide a
safety buffer between conflicting phases.
9. What is a yellow change interval intended to do?
A. Tell drivers to accelerate
B. Warn approaching drivers that the green indication is
ending and the red indication is coming
, C. Allow pedestrians to start crossing
D. Shut down the controller
Correct Answer: Warn approaching drivers that the
green indication is ending and the red indication is
coming
Rationale: Yellow provides a transition between the
permissive green indication and the required stop
condition of red.
10. What type of signal operation responds to vehicle or
pedestrian detection?
A. Fixed-time
B. Actuated
C. Manual-only
D. Flashing-only
Correct Answer: Actuated
Rationale: Actuated operation changes phase service
based on detector or pedestrian inputs.
11. What is a fully actuated signal?
A. A signal with no detectors
B. A signal controlled entirely by a clock
C. A signal with detection influencing phases on the
approaches being controlled
D. A signal that only serves pedestrians
Correct Answer: A signal with detection influencing
phases on the approaches being controlled
Rationale: Fully actuated operation uses detector inputs
to influence phase calls and timing.
12. What is a semi-actuated signal?
A. A signal with no controller
B. A signal where selected approaches or movements
are actuated while other phases may operate without
detection
