Practice Test Geeks(NETTCP) New England Transportation Technician Certification Program Practice Test
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Traffic Management & Control Systems Flashcards

7 cards from real NETTCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the primary purpose of an Adaptive Traffic Control System (ATCS)?

    Answer: Dynamically adjust signal timing based on real-time traffic conditions

    ATCS uses real-time detector data to continuously optimize signal timing, reducing delays compared to static timing plans.

  2. A queue detector in a traffic signal system is typically placed at what location?

    Answer: Upstream of the intersection to detect spillback

    Queue detectors are positioned upstream to sense vehicle backup before it blocks upstream intersections or driveways.

  3. In traffic signal coordination, 'bandwidth' refers to:

    Answer: The range of green time available for vehicles to travel through multiple coordinated signals

    Bandwidth is the window of time (in seconds) during which vehicles can progress through a series of coordinated signals without stopping.

  4. Which type of traffic count device uses pneumatic road tubes to detect vehicles?

    Answer: Portable axle counter

    Pneumatic road tube counters record axle hits as air pulses, making them portable axle counters used for short-term traffic studies.

  5. What does the term 'saturation flow rate' mean in traffic engineering?

    Answer: The maximum throughput of a lane when vehicles move in a continuous queue under green

    Saturation flow rate is the maximum number of vehicles per hour that can pass through a lane group during an uninterrupted green phase.

  6. In a traffic management center (TMC), a Dynamic Message Sign (DMS) is primarily used to:

    Answer: Communicate real-time travel information and warnings to motorists

    DMS boards display variable messages such as travel times, incident alerts, and detour instructions to inform drivers in real time.

  7. A 'protected-permissive' left-turn phase allows left-turning vehicles to:

    Answer: Turn left during a green arrow and also during the circular green when gaps are available

    Protected-permissive phasing gives drivers both a protected arrow and a permissive window during circular green, increasing intersection capacity.