Traffic sign recognition (TSR) systems can recognize common traffic signs, such as a “stop” sign or a “turn ahead” sign, through image processing techniques. This system takes into account the sign’s shape, such as hexagons and rectangles, and the color to classify what the sign is communicating to the driver.[48] Since most systems currently use camera-based technology, a wide variety of factors can make the system less accurate. These include poor lighting conditions, extreme weather conditions, and partial obstruction of the sign