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TPCB Professional Traffic Operations Engineer Practice Sample Questions:

1. A freeway segment has a density of 70 vehicles per mile and a flow rate of 2,800 vehicles per hour. What is the space mean speed?

A) 50 mph
B) 45 mph
C) 40 mph
D) 35 mph

2. On a freeway with a flow rate of 3,000 vehicles per hour and a space mean speed of 60 mph, what is the density of traffic flow?

A) 40 vehicles per mile
B) 60 vehicles per mile
C) 30 vehicles per mile
D) 50 vehicles per mile

3. When timing pedestrian intervals for traffic control signals, what pedestrian walking speed should normally be used?

A) 3.5 feet per second
B) 2.5 feet per second
C) 4.5 feet per second
D) 5.5 feet per second

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) 44 seconds
C) 36 seconds
D) 48 seconds

5. According to the Model Rules, Section 240.15, Rules of Professional Conduct, licensed professional engineers are obligated to:

A) Express public opinions under the direction of an employer or client regardless of the knowledge of subject matter
B) Ensure the design documents and surveys are reviewed by a panel of licensed engineers prior to affixing a seal of approval
C) Practice by performing services only in the areas of their competence and in accordance with current standards of technical competence
D) Do whatever is necessary to secure work, including offering directly or indirectly, services or other compensation for contracts

Solutions: