California Traffic Engineer Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2025
Q&A | Instant Download PDF
1. A traffic engineer observes recurring rear-end collisions at a signalized
intersection. The MOST appropriate first action is to:
A. Reduce roadway width
B. Conduct traffic signal timing analysis
C. Remove pavement markings
D. Increase speed limit
Answer: B
Rationale: Improper signal timing commonly contributes to rear-end crashes.
2. The primary purpose of an all-red clearance interval is to:
A. Increase traffic speed
B. Allow vehicles to clear the intersection safely
C. Reduce pedestrian crossings
D. Increase roadway capacity
Answer: B
Rationale: All-red intervals reduce collision risk during phase transitions.
3. A California traffic engineer evaluating freeway congestion should FIRST
analyze:
A. Paint color
B. Traffic volume and level of service
C. Driver age only
D. Weather forecasts only
,Answer: B
Rationale: Traffic engineering decisions begin with operational analysis.
4. The MUTCD primarily governs:
A. Building construction
B. Uniform traffic control devices and standards
C. HVAC operations
D. Structural welding procedures
Answer: B
Rationale: MUTCD standardizes traffic signs, markings, and signals.
5. A signalized intersection experiences long delays despite low traffic volumes.
MOST likely cause:
A. Improper signal timing
B. High pavement friction
C. Excessive lane width
D. Strong lighting
Answer: A
Rationale: Poor timing can create unnecessary delays.
6. A traffic engineer notices skid-related crashes during rain. MOST appropriate
recommendation:
A. Increase speed limit
B. Improve pavement friction and drainage
C. Remove warning signs
D. Narrow shoulders
Answer: B
Rationale: Wet-weather crashes are commonly linked to reduced traction.
7. The purpose of a traffic impact study is to:
A. Determine building height
B. Evaluate transportation effects of development projects
C. Measure soil stability only
D. Reduce electrical demand
,Answer: B
Rationale: Traffic impact studies analyze future transportation effects.
8. A protected left-turn phase is MOST effective when:
A. Left-turn demand and conflict risk are high
B. Traffic volume is extremely low
C. No pedestrians are present
D. Signals are removed
Answer: A
Rationale: Protected phases improve safety during heavy turning movements.
9. A California engineer evaluating a school zone should prioritize:
A. High-speed vehicle movement
B. Pedestrian and student safety
C. Reducing crosswalk visibility
D. Increasing lane widths only
Answer: B
Rationale: School zone engineering focuses on vulnerable users.
10. A traffic signal cabinet loses communication with the central system. The
intersection should:
A. Operate unsafely
B. Default to programmed local control
C. Shut off permanently
D. Increase cycle length automatically
Answer: B
Rationale: Controllers are designed for safe local operation during communication
loss.
11. A freeway merge area experiences recurring congestion. MOST likely
contributing factor:
A. Insufficient acceleration lane length
B. Excessive pavement markings
, C. Low lighting
D. Narrow sidewalks
Answer: A
Rationale: Short merge distances disrupt traffic flow.
12. The primary purpose of traffic calming is to:
A. Increase freeway speed
B. Reduce vehicle speeds and improve neighborhood safety
C. Eliminate pedestrian crossings
D. Increase truck traffic
Answer: B
Rationale: Traffic calming improves local roadway safety.
13. A signalized intersection with high pedestrian activity should include:
A. Reduced visibility
B. Pedestrian countdown indications
C. No crosswalk markings
D. Higher vehicle speeds
Answer: B
Rationale: Countdown signals improve pedestrian awareness.
14. A traffic engineer conducting a warrant analysis for a new signal should
reference:
A. MUTCD signal warrants
B. Plumbing code
C. Fire code only
D. Structural steel manual
Answer: A
Rationale: MUTCD defines traffic signal warrant criteria.
15. A roadway with frequent runoff-road crashes may benefit MOST from:
A. Removing edge lines
B. Guardrails and enhanced delineation
Questions And Correct Answers
(Verified Answers) Plus Rationales 2025
Q&A | Instant Download PDF
1. A traffic engineer observes recurring rear-end collisions at a signalized
intersection. The MOST appropriate first action is to:
A. Reduce roadway width
B. Conduct traffic signal timing analysis
C. Remove pavement markings
D. Increase speed limit
Answer: B
Rationale: Improper signal timing commonly contributes to rear-end crashes.
2. The primary purpose of an all-red clearance interval is to:
A. Increase traffic speed
B. Allow vehicles to clear the intersection safely
C. Reduce pedestrian crossings
D. Increase roadway capacity
Answer: B
Rationale: All-red intervals reduce collision risk during phase transitions.
3. A California traffic engineer evaluating freeway congestion should FIRST
analyze:
A. Paint color
B. Traffic volume and level of service
C. Driver age only
D. Weather forecasts only
,Answer: B
Rationale: Traffic engineering decisions begin with operational analysis.
4. The MUTCD primarily governs:
A. Building construction
B. Uniform traffic control devices and standards
C. HVAC operations
D. Structural welding procedures
Answer: B
Rationale: MUTCD standardizes traffic signs, markings, and signals.
5. A signalized intersection experiences long delays despite low traffic volumes.
MOST likely cause:
A. Improper signal timing
B. High pavement friction
C. Excessive lane width
D. Strong lighting
Answer: A
Rationale: Poor timing can create unnecessary delays.
6. A traffic engineer notices skid-related crashes during rain. MOST appropriate
recommendation:
A. Increase speed limit
B. Improve pavement friction and drainage
C. Remove warning signs
D. Narrow shoulders
Answer: B
Rationale: Wet-weather crashes are commonly linked to reduced traction.
7. The purpose of a traffic impact study is to:
A. Determine building height
B. Evaluate transportation effects of development projects
C. Measure soil stability only
D. Reduce electrical demand
,Answer: B
Rationale: Traffic impact studies analyze future transportation effects.
8. A protected left-turn phase is MOST effective when:
A. Left-turn demand and conflict risk are high
B. Traffic volume is extremely low
C. No pedestrians are present
D. Signals are removed
Answer: A
Rationale: Protected phases improve safety during heavy turning movements.
9. A California engineer evaluating a school zone should prioritize:
A. High-speed vehicle movement
B. Pedestrian and student safety
C. Reducing crosswalk visibility
D. Increasing lane widths only
Answer: B
Rationale: School zone engineering focuses on vulnerable users.
10. A traffic signal cabinet loses communication with the central system. The
intersection should:
A. Operate unsafely
B. Default to programmed local control
C. Shut off permanently
D. Increase cycle length automatically
Answer: B
Rationale: Controllers are designed for safe local operation during communication
loss.
11. A freeway merge area experiences recurring congestion. MOST likely
contributing factor:
A. Insufficient acceleration lane length
B. Excessive pavement markings
, C. Low lighting
D. Narrow sidewalks
Answer: A
Rationale: Short merge distances disrupt traffic flow.
12. The primary purpose of traffic calming is to:
A. Increase freeway speed
B. Reduce vehicle speeds and improve neighborhood safety
C. Eliminate pedestrian crossings
D. Increase truck traffic
Answer: B
Rationale: Traffic calming improves local roadway safety.
13. A signalized intersection with high pedestrian activity should include:
A. Reduced visibility
B. Pedestrian countdown indications
C. No crosswalk markings
D. Higher vehicle speeds
Answer: B
Rationale: Countdown signals improve pedestrian awareness.
14. A traffic engineer conducting a warrant analysis for a new signal should
reference:
A. MUTCD signal warrants
B. Plumbing code
C. Fire code only
D. Structural steel manual
Answer: A
Rationale: MUTCD defines traffic signal warrant criteria.
15. A roadway with frequent runoff-road crashes may benefit MOST from:
A. Removing edge lines
B. Guardrails and enhanced delineation
