California Traffic Engineer Examination Newest 2026/2027 Questions
and Correct Detailed Answers with Rationales Already Graded A+
1. What is the primary objective of traffic engineering?
A. Maximize vehicle speed on every roadway
B. Provide safe and efficient movement of people and goods
C. Eliminate all traffic signals
D. Increase roadway construction costs
Correct Answer: B
Rationale: Traffic engineering applies engineering principles to achieve safe and
efficient transportation. The objective includes accommodating vehicles,
pedestrians, bicyclists, transit, and other road users while managing safety and
operations.
2. Which California agency is primarily responsible for the state highway system?
A. Caltrans
,B. DMV
C. CHP
D. California Coastal Commission
Correct Answer: A
Rationale: The California Department of Transportation (Caltrans) is responsible
for the operation, maintenance, and development of the state highway
transportation system, subject to applicable laws and policies.
3. What is traffic volume?
A. The physical width of a roadway
B. The number of vehicles passing a point during a specified period
C. The average vehicle length
D. The number of traffic signals in a city
Correct Answer: B
,Rationale: Traffic volume is normally expressed as vehicles per unit of time, such
as vehicles per hour or vehicles per day.
4. What does Average Annual Daily Traffic (AADT) represent?
A. Traffic during the busiest 15 minutes
B. Average daily traffic over a year
C. Traffic during one morning peak hour
D. Weekend traffic only
Correct Answer: B
Rationale: AADT represents the average number of vehicles traveling along a
roadway location per day over a year.
5. Why is peak-hour traffic important in traffic engineering?
A. It represents the period when transportation facilities may experience their
highest demand
B. It eliminates the need for daily traffic data
, C. It represents annual average traffic
D. It applies only to pedestrians
Correct Answer: A
Rationale: Peak periods often create the greatest demand and congestion.
Engineers use peak-hour information to evaluate capacity, operations, and design
requirements.
6. What is the peak-hour factor (PHF) used to describe?
A. Roadway pavement strength
B. Variation of traffic flow within the peak hour
C. Vehicle horsepower
D. Intersection pavement thickness
Correct Answer: B
and Correct Detailed Answers with Rationales Already Graded A+
1. What is the primary objective of traffic engineering?
A. Maximize vehicle speed on every roadway
B. Provide safe and efficient movement of people and goods
C. Eliminate all traffic signals
D. Increase roadway construction costs
Correct Answer: B
Rationale: Traffic engineering applies engineering principles to achieve safe and
efficient transportation. The objective includes accommodating vehicles,
pedestrians, bicyclists, transit, and other road users while managing safety and
operations.
2. Which California agency is primarily responsible for the state highway system?
A. Caltrans
,B. DMV
C. CHP
D. California Coastal Commission
Correct Answer: A
Rationale: The California Department of Transportation (Caltrans) is responsible
for the operation, maintenance, and development of the state highway
transportation system, subject to applicable laws and policies.
3. What is traffic volume?
A. The physical width of a roadway
B. The number of vehicles passing a point during a specified period
C. The average vehicle length
D. The number of traffic signals in a city
Correct Answer: B
,Rationale: Traffic volume is normally expressed as vehicles per unit of time, such
as vehicles per hour or vehicles per day.
4. What does Average Annual Daily Traffic (AADT) represent?
A. Traffic during the busiest 15 minutes
B. Average daily traffic over a year
C. Traffic during one morning peak hour
D. Weekend traffic only
Correct Answer: B
Rationale: AADT represents the average number of vehicles traveling along a
roadway location per day over a year.
5. Why is peak-hour traffic important in traffic engineering?
A. It represents the period when transportation facilities may experience their
highest demand
B. It eliminates the need for daily traffic data
, C. It represents annual average traffic
D. It applies only to pedestrians
Correct Answer: A
Rationale: Peak periods often create the greatest demand and congestion.
Engineers use peak-hour information to evaluate capacity, operations, and design
requirements.
6. What is the peak-hour factor (PHF) used to describe?
A. Roadway pavement strength
B. Variation of traffic flow within the peak hour
C. Vehicle horsepower
D. Intersection pavement thickness
Correct Answer: B
