California Traffic Engineer Exam Questions And Correct
Answers (Verified Answers) Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the minimum yellow change interval recommended for a traffic
signal at a 35 mph approach speed?
A. 2.0 seconds
B. 3.0 seconds
C. 3.6 seconds
D. 4.5 seconds
Rationale: The ITE and Caltrans guidelines recommend a yellow change interval
of approximately 3.6 seconds for a 35 mph approach, considering perception-
reaction time and deceleration.
2. MUTCD guidelines categorize which type of sign as a regulatory sign?
A. Stop sign
B. Speed limit sign
C. Pedestrian crossing sign
D. Construction warning sign
Rationale: Regulatory signs impose legal obligations and restrictions on drivers,
and speed limit signs are a core example.
3. What does Level of Service (LOS) “E” represent at a signalized intersection?
,A. Free flow
B. Stable flow with slight delays
C. Approaching unstable flow
D. Operation at or near capacity
Rationale: LOS E indicates operations at capacity, where even small disruptions
can cause breakdowns.
4. In a signal warrant analysis, Warrant 1 refers to:
A. Pedestrian volume
B. School crossing
C. Eight-hour vehicular volume
D. Collision history
Rationale: Warrant 1 in the MUTCD is based on 8-hour vehicular volume data.
5. Which of the following factors has the greatest influence on roundabout
design?
A. Street lighting
B. Number of pedestrian crossings
C. Landscaping
D. Entry speed and deflection
Rationale: Entry speed and deflection directly impact safety and operational
efficiency at roundabouts.
6. What is the primary purpose of a sight distance triangle?
A. Improve aesthetic design
B. Ensure adequate visibility at intersections
, C. Create space for landscaping
D. Provide room for signage
Rationale: Sight distance triangles prevent visual obstructions at intersections,
enhancing safety.
7. A pedestrian clearance interval for a crosswalk is generally calculated using
what walking speed?
A. 2.5 ft/sec
B. 3.5 ft/sec
C. 4.0 ft/sec
D. 5.0 ft/sec
Rationale: The MUTCD recommends a pedestrian walking speed of 3.5 ft/sec for
timing clearance intervals.
8. Which of the following is a key component in calculating the signal cycle
length using Webster’s method?
A. Traffic composition
B. Roadway grade
C. Lost time per phase
D. Driver behavior
Rationale: Webster’s formula incorporates lost time per phase to determine
optimal signal cycle length.
9. Which pavement marking is used to indicate a bike lane?
A. Solid yellow line
B. Broken white line
Answers (Verified Answers) Plus Rationales 2025/2026
Q&A | Instant Download Pdf
1. What is the minimum yellow change interval recommended for a traffic
signal at a 35 mph approach speed?
A. 2.0 seconds
B. 3.0 seconds
C. 3.6 seconds
D. 4.5 seconds
Rationale: The ITE and Caltrans guidelines recommend a yellow change interval
of approximately 3.6 seconds for a 35 mph approach, considering perception-
reaction time and deceleration.
2. MUTCD guidelines categorize which type of sign as a regulatory sign?
A. Stop sign
B. Speed limit sign
C. Pedestrian crossing sign
D. Construction warning sign
Rationale: Regulatory signs impose legal obligations and restrictions on drivers,
and speed limit signs are a core example.
3. What does Level of Service (LOS) “E” represent at a signalized intersection?
,A. Free flow
B. Stable flow with slight delays
C. Approaching unstable flow
D. Operation at or near capacity
Rationale: LOS E indicates operations at capacity, where even small disruptions
can cause breakdowns.
4. In a signal warrant analysis, Warrant 1 refers to:
A. Pedestrian volume
B. School crossing
C. Eight-hour vehicular volume
D. Collision history
Rationale: Warrant 1 in the MUTCD is based on 8-hour vehicular volume data.
5. Which of the following factors has the greatest influence on roundabout
design?
A. Street lighting
B. Number of pedestrian crossings
C. Landscaping
D. Entry speed and deflection
Rationale: Entry speed and deflection directly impact safety and operational
efficiency at roundabouts.
6. What is the primary purpose of a sight distance triangle?
A. Improve aesthetic design
B. Ensure adequate visibility at intersections
, C. Create space for landscaping
D. Provide room for signage
Rationale: Sight distance triangles prevent visual obstructions at intersections,
enhancing safety.
7. A pedestrian clearance interval for a crosswalk is generally calculated using
what walking speed?
A. 2.5 ft/sec
B. 3.5 ft/sec
C. 4.0 ft/sec
D. 5.0 ft/sec
Rationale: The MUTCD recommends a pedestrian walking speed of 3.5 ft/sec for
timing clearance intervals.
8. Which of the following is a key component in calculating the signal cycle
length using Webster’s method?
A. Traffic composition
B. Roadway grade
C. Lost time per phase
D. Driver behavior
Rationale: Webster’s formula incorporates lost time per phase to determine
optimal signal cycle length.
9. Which pavement marking is used to indicate a bike lane?
A. Solid yellow line
B. Broken white line
