Recently, Duolun Technology won the invention patent certificate issued by China National Intellectual Property Administration, dubbed A Method to Prevent Traffic Congestion at Intersections. The invention patent relates to a method for preventing traffic congestion at intersections based on the queuing theory of the Internet of Vehicles (IoV) and the moving block model, which can be applied to the technical field of urban traffic in the future.

Research Background

The economic loss caused by traffic congestion accounts for 5%-8% of the national productivity, while 80% of urban traffic congestion is concentrated in intersections and urban centers, according to the data of the Ministry of Transport. Network technology is going ahead by leaps and bounds. Compared with artificial traffic management, speed guidance has advantages in safety and cost. From the perspective of the urban road network, it is better to take the intersection group as the main object of congestion control.

Meaning of Invention

The name of the invention is a Method to Prevent Traffic Congestion at Intersections. The patent number is ZL 2020 1 0458074.5, and a method to prevent traffic congestion at intersections is disclosed, which includes the following steps:

(1) define intersection groups;

(2) use the queuing theory model to judge whether there is traffic congestion at the intersection;

(3) establish a speed guidance model based on the moving block model;

(4) according to the speed guidance model, the optimal driving speed of the vehicle is obtained and transmitted the data back to the on-board terminal.

The computer calculates the optimal driving speed and transmits it back to the on-board terminal. So that safety and efficiency are ensured, the problem that the driver incorrectly judges the speed at the intersection is solved, and the traffic congestion caused by the driving speed is effectively prevented.

Technical Innovation

Amid the IoV environment, based on the vehicle positioning technology, vehicle sensor technology and wireless communication technology, the road mapping unit gathers environmental information such as road signs, traffic signal lights and surrounding vehicle information, and transmits them to the control center. Taking safety and efficiency as a priority, the control center obtains the current optimal driving speed after calculating and sends it to the on-board terminal according to the speed guidance model and the moving block model.

When traffic congestion occurs, the queuing theory is used to calculate the average waiting time of traffic congestion. If the average waiting time exceeds the threshold, the speed guidance model is improved. For congested vehicles, the guidance speed is increased on the basis of ensuring safety. And for rear vehicles, the guidance speed is appropriately reduced until the congestion intersection is completely clear.

Winning this invention will play a positive role in building technical barriers in the field of vehicle-road collaboration and improving the smart transportation product system. In the future, Duolun Technology will continue to strive to maintain its leading position in technology and empower the business to develop steadily and continuously with technological innovation.