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1. What is the primary purpose of a traffic control supervisor on a
roadway worksite?
A. To design permanent roadways
B. To enforce speed limits using radar guns
C. To ensure safe and efficient movement of traffic through or
around work zones
D. To repair roadway pavement
Answer: C
Rationale: The traffic control supervisor is responsible for maintaining
safety and efficient traffic flow in and around work zones, not
performing enforcement or construction duties.
2. Which manual is most commonly used as the standard for work
zone traffic control in the United States?
A. OSHA Construction Handbook
B. MUTCD
C. ADA Accessibility Guide
D. DOT Highway Repair Manual
,Answer: B
Rationale: The Manual on Uniform Traffic Control Devices (MUTCD)
provides national standards for all traffic control devices and work
zone setups.
3. What is the first priority when setting up a work zone?
A. Installing signage
B. Protecting workers and road users
C. Maximizing traffic speed
D. Reducing project cost
Answer: B
Rationale: Safety of workers and road users is always the highest
priority in any work zone setup.
4. Which color is typically used for temporary traffic control signs?
A. Blue
B. Green
C. Orange
D. Brown
Answer: C
Rationale: Orange is designated for temporary traffic control and
construction-related warning signs.
5. What does a taper in traffic control refer to?
A. A permanent lane marking
B. A transition area where vehicles are guided into a different
path
, C. A type of traffic signal
D. A bridge expansion joint
Answer: B
Rationale: A taper gradually shifts traffic from one lane to another or
into a work zone bypass.
6. Who is responsible for ensuring traffic control devices are
properly installed and maintained?
A. Police officer
B. Road engineer only
C. Traffic control supervisor
D. Emergency responder
Answer: C
Rationale: The supervisor ensures all devices are correctly installed,
visible, and maintained throughout the project.
7. What is the meaning of a flagger paddle displaying “STOP”?
A. Proceed with caution
B. Slow down and merge
C. Come to a complete stop
D. Construction ahead
Answer: C
Rationale: The “STOP” paddle instructs drivers to stop completely until
directed otherwise.
8. What is the minimum recommended visibility distance for
advance warning signs in high-speed zones?
, A. 50 feet
B. 100 feet
C. 150 feet
D. Several hundred feet depending on speed
Answer: D
Rationale: Higher speeds require longer sight distances, often several
hundred feet per MUTCD guidelines.
9. Which device is used to channelize traffic in work zones?
A. Speed bump
B. Traffic cone
C. Billboard
D. Parking meter
Answer: B
Rationale: Traffic cones help guide and channel vehicles safely
through or around work areas.
10. What is the primary role of a flagger?
A. Direct construction crews
B. Control vehicle and pedestrian traffic safely through work
zones
C. Repair road surfaces
D. Install signage permanently
Answer: B
Rationale: Flaggers are responsible for directing and controlling traffic
flow in work zones.