Inductive loops are a type of sensor used primarily in traffic management systems. They consist of a loop of wire embedded in the pavement, which detects the presence of vehicles by measuring changes in inductance when a metal object, like a car, passes over or stops above the loop. These sensors are commonly used at traffic signals and intersections to help control traffic flow. When a vehicle is detected, the system can trigger a green light or adjust the timing of the signal, improving efficiency and reducing wait times for drivers.