What components make up an inductive loop assembly?

The components of an inductive loop assembly are crucial for the effective detection of vehicles at traffic signal intersections. The correct answer identifies three main components that work together to ensure the system functions properly.

The detector amplifier is a key part that processes the signals received from the loop and determines when a vehicle is present. The lead-in cable connects the inductive loop installed in the pavement to the detector amplifier, ensuring the signals can travel between these two components. Insulated loop wire forms the physical loop embedded in the pavement. This wire creates a magnetic field that can detect metal objects, such as vehicles, when they pass over the loop.

These components work collaboratively to allow the inductive loop to detect vehicles accurately and efficiently, which is essential for controlling traffic signals and improving traffic flow.

Other provided choices do not encompass the full assembly of an inductive loop system. For instance, while a power supply and wires are essential for many electrical systems, they do not specifically pertain to the inductive loop assembly components. Similarly, traffic signals, loop interfaces, and software could relate to broader traffic management systems but miss the specific elements essential to an inductive loop's operation.