COMPUTER FUNDAMENTALS

Detailed explanation-1: -IR Sensor is known as infrared sensor which is used to sense nearby object.

Detailed explanation-2: -Contrary to popular belief, most traffic lights do not work on a simple timer. Most use in-roadway sensors or pressure transducers to calculate how many vehicles are at a particular intersection.

Detailed explanation-3: -In order to ensure that traffic stays moving, lights are often installed with two types of sensors, or a sensor plus an inductive loop. If one type of detection becomes infeasible due to outside conditions or a hardware failure, the system is able to fall back on another and avoid a major traffic nightmare.

Detailed explanation-4: -Rather than timers, “smart” or “intelligent” sensor-based traffic signals rely upon a system of sensors to detect when vehicles are present. The types of sensors used can vary by location and technology. Some systems use lasers, rubber hoses filled with air, or video cameras to detect the presence of cars.