Control Contractor Exam Questions

CA C31 Construction Zone Traffic Control Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary purpose of a construction zone traffic control plan?
• To reduce construction costs
• To ensure worker and motorist safety
• To maximize construction speed
• To avoid environmental regulations
• To ensure worker and motorist safety

Rationale: The main goal of a traffic control plan is to protect both

workers and road users from hazards in the construction zone.

• Which device is used to alert drivers of a lane closure ahead?
• Barricades
• Warning signs
• Speed bumps
• Traffic cones
• Warning signs

Rationale: Warning signs provide advance notice to drivers about

upcoming lane closures or other hazards.

• What color are temporary construction warning signs typically?
• Red
• Blue
• Orange
• Green
• Orange 1 / 3

Rationale: Orange is the standard color for temporary construction

or maintenance warning signs, indicating caution.

• When setting up a construction work zone, which of the following is

most important?

• Minimizing delays
• Worker visibility and safety
• Increasing traffic speed
• Reducing material costs
• Worker visibility and safety

Rationale: Ensuring workers are visible and safe is the top priority in

any work zone setup.

• What is the purpose of channelizing devices?
• To mark parking areas
• To guide traffic safely through a work zone
• To measure traffic speed
• To secure construction materials
• To guide traffic safely through a work zone

Rationale: Channelizing devices, such as cones and barrels, help

direct vehicles safely through or around a work zone.

• Which type of sign indicates the end of a work zone?
• Detour sign
• Work zone speed limit sign
• End road work sign
• No parking sign
• End road work sign

Rationale: An “End Road Work” sign clearly informs drivers that

they are leaving the construction zone.

• How far in advance should a warning sign be placed before a lane

closure on a highway?

• 50 feet
• 100–200 feet
• 500–1000 feet
• 2000 feet
• 500–1000 feet

Rationale: Proper sign placement distance allows drivers enough

time to slow down and change lanes safely. 2 / 3

• What is the main purpose of a flagger in a construction zone?
• To repair traffic signs
• To direct and control traffic
• To remove debris
• To inspect construction equipment
• To direct and control traffic

Rationale: Flaggers are trained personnel who safely control traffic

flow through or around work zones.

• Which of the following is a key factor in designing a safe work zone?
• Worker breaks
• Traffic volume and speed
• Construction material quality
• Cost of equipment
• Traffic volume and speed

Rationale: Understanding traffic flow and speed helps determine

appropriate control measures and reduces accident risks.

• What is the standard color for construction zone traffic cones?
• Yellow
• Red
• Orange
• Green
• Orange

Rationale: Orange cones are widely recognized as a temporary traffic

control device for construction zones.

• When should temporary traffic control devices be removed from

a work zone?

• Immediately after the work is completed
• At the end of each day
• Only when construction is completely finished
• During heavy traffic hours
• Immediately after the work is completed

Rationale: Removing devices promptly prevents confusion and

maintains traffic safety.

• Which device is used to physically prevent vehicles from

entering a hazardous area?

• Channelizing cones
• Barricades
• / 3