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TPCB Professional Traffic Operations Engineer Practice Sample Questions:

1. If an incident blocks one of three freeway lanes, the likely capacity reduction due to the incident is:

A) 33%
B) 75%
C) 90%
D) 51%

2. A freeway segment with a base capacity of 2,400 passenger cars per hour per lane is adjusted for 10% trucks (PCU = 2.0) and a PHF of 0.90. What is the adjusted capacity per lane?

A) 2,080 vehicles/hour
B) 2,240 vehicles/hour
C) 2,160 vehicles/hour
D) 1,920 vehicles/hour

3. A signalized intersection has a peak hour factor (PHF) of 0.80 based on 15-minute counts of 400, 350, 300, and 250 vehicles. What is the hourly volume?

A) 1,300 vehicles/hour
B) 1,500 vehicles/hour
C) 1,400 vehicles/hour
D) 1,600 vehicles/hour

4. For a signalized intersection, the critical lane volume is 1,500 vehicles/hour, and the saturation flow rate is
1,800 vehicles/hour/lane. What is the minimum green time required for a 90-second cycle with 4 seconds of lost time per phase?

A) 40 seconds
B) 36 seconds
C) 48 seconds
D) 44 seconds

5. In the case of an ethical conflict, which entity takes precedence?

A) The employer
B) The client
C) Society and the client are equal and take precedence
D) Society

Solutions: