During the rush hour, there was no traffic accident, but the traffic stopped and stopped, which not only wasted the precious time of countless citizens, but also brought great pressure to maintain the air quality of the city. With Unity simulation, it can be found that a normal traffic flow will slow down and eventually become blocked due to a driver's sudden braking. Compared with other vehicles, you will find that the distance between this car and the vehicle in front is too close. Lengthening the distance between cars may solve this problem, but the infinite lengthening of the distance between cars will lead to the waste of road traffic resources. How long should the distance between vehicles be maintained in order to maximize the efficiency of road traffic? High-precision sensors and artificial intelligence algorithms may be able to help us. When each vehicle is equipped with GPS and gyroscopes, we can know the movement of all vehicles on the road. By uploading the data to the cloud for processing and analysis, we can obtain an "optimal solution", and all drivers on the road can implement this "optimal solution" to maximize the efficiency of road traffic. How to realize this idea? The "intelligent driving analyzer" developed by our team realizes optical projection by combining optical lenses and adding high-power LEDs. Finally guide the driver to speed control in a visual way. When the vehicles on the whole road move forward at the "optimal and most rational" speed, you and I may find that the traffic efficiency of the original road can reach such a high level. You and I don't have to worry about congestion any more. After rest, we look up at the sky. The blue sky and white clouds once seemed to be back.