Using real-time signal information and position information from GPS and cell signals, EnLighten notices when drivers stop at a red light. It then uses Green Driver's proprietary technology to predict when that light will change. If it can predict, it tells them. Then, just before the light turns green, a chime warns the driver to get ready.

Knowing how much time is available can keep drivers from starting distracting tasks shortly before a light changes and they need to drive. The chime that sounds shortly before the light changes also helps avoid situations where a car darts into an intersection after being honked at by another driver.