Traffic Signals: The acronyms MNL (Manual Mode), VAC (Vehicle Actuated Controller), ATC (Adaptive Traffic Control) found on Hyderabad traffic signals refer to advanced traffic management systems. While MNL refers to human control, VAC adjusts signal timing by detecting vehicle traffic through sensors. ATC is the most advanced. It integrates signals and optimizes traffic flow along the entire route. These technologies help reduce traffic jams, save travel time, and facilitate vehicle movement in the city.
Many people would have noticed these at the traffic signals in Hyderabad. MNL, VAC, ATC are visible on the signal lights. These are not just letters, but symbols of advanced systems that improve traffic management . Let’s take a detailed look at how these technologies work, what are their benefits, and how they contribute to Hyderabad’s traffic control.
MNL stands for Manual Mode. As the name suggests, in this mode, the traffic signals operate under human control. Usually, the timing of the signal lights is changed through human intervention from the traffic police or the control center. This is most necessary in unusual situations, such as heavy traffic jams , accidents, VIP arrivals, or protests. This manual mode is often used at very busy intersections like Panjagutta intersection. It helps in clearing traffic immediately and giving priority to specific routes. However, it requires constant human supervision.
VAC stands for Vehicle Actuated Controller. It is an advanced traffic signal control system that is based on sensors. The system uses sensors (usually loop detectors or cameras) to detect the traffic on the road. It automatically adjusts the time until the green light is on until the traffic clears the busy road. This technology can be seen at places like Ravindra Bharati.
ATC stands for Adaptive Traffic Control. It is the most advanced technology in traffic management. ATC systems not only detect congestion at a signal, but also connect with other signals through sensors. That is, depending on the traffic situation at an intersection, they automatically adjust the timing of the lights at subsequent signals that are affected by it. For example, if there is heavy traffic on a route from Lakdikapool to Nampally, this system coordinates the timing of the signals on that entire route and ensures continuous traffic congestion. This effectively reduces traffic jams and facilitates the movement of vehicles even on long routes. By analyzing real-time data, ATC systems optimize traffic flow. Reduce travel time and increase the capacity of roads.
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