Control method and system for improving passing efficiency of narrowed road section

Abstract

The invention relates to a control method and system for improving the passing efficiency of a narrowed road section. The control method comprises the steps: S1, the average speed, the flow and the traffic flow density, obtained at each sampling moment, of various types of vehicles in various lanes of various road sections are recorded; S2, a traffic flow prediction model is established on the basis of a Multi-Class CTM model and in combination with the number of vehicles for speed limiting and lane changing of different lanes, and a measured value serves as an initial condition for predictingfuture dynamic conditions of traffic by the prediction model; S3, based on the traffic flow prediction model, an objective function and constraint conditions of an optimization problem are established, and a finite time domain optimization problem is solved; and S4, the first element in the optimization problem solution sequence acts on the controlled object based on a rolling optimization framework of model prediction control, the next sampling moment is entered, and the steps are repeated until the whole sampling time period is completed. According to the scheme, the application speed and the traffic state change between different lanes within limited time after lane changing control are predicted, and the prediction precision is improved.

Description

technical field [0001] The invention relates to a control method and system for improving the traffic efficiency of narrowed highway sections, and belongs to the field of dynamic traffic control. Background technique [0002] With the rapid development of unmanned driving and intelligent network technology, the vehicle itself not only has the function of automatic driving, but also can communicate with other vehicles and control systems in real time. Through unmanned driving and intelligent network technology, it is not only possible to obtain full-time traffic information, but also to carry out coordinated control of all vehicles on the road, thereby greatly improving traffic efficiency. The above-mentioned advantages are especially obvious in the control of the narrowing section of the expressway. Due to factors such as road design, traffic accidents, and road construction, there are often road sections with reduced number of lanes on expressways. In these road sections,...

AI Technical Summary

Problems solved by technology

The former does not fully consider the fact that there will be a large number of vehicles forced to change lanes at the bottleneck of the narrowed road section, resulting in limited control effects; while the latter ignores the difference in road speeds between adjacent lanes caused by partial lane closures, resulting in when the surrounding vehicles When the speed difference and the lane-changing gap do not meet the lane-changing conditions, the lane-changing control cannot be performed

Images