When driving, if there are large vehicles such as trucks or buses blocking the path, the driver behind may not be able to have a good view of the driveway. As a result, the driver who is behind may not be able to see the traffic lights. Therefore, when following behind large vehicles, there are high risks of violating signals or getting into car accidents due to the sudden change of traffic lights. Therefore, a car license plate which provides the status of the traffic lights in advance was designed. Through this, the drivers who are coming from behind can receive information on the traffic signals in advance. Consequently, this will prevent drivers from violating signals or getting into accidents. The traffic signals can be received in real-time from the traffic lights through the sensor of the signal license plate. Therefore, the traffics light can be passed on visually to the driver who is coming from behind.