CN-121305860-B - Traffic control method based on signal timing and vehicle speed induction bidirectional control

CN121305860BCN 121305860 BCN121305860 BCN 121305860BCN-121305860-B

Abstract

The invention relates to the field of intelligent traffic control, in particular to a traffic control method based on signal timing and vehicle speed induction bidirectional control, which comprises the following steps of collecting dynamic traffic data of an intersection in real time, and calculating an optimal signal period C by adopting a Webster method according to the dynamic traffic data; the method comprises the steps of determining an optimal timing scheme by adopting a double-loop phase structure according to an optimal signal period C, optimizing and adjusting the optimal timing scheme by taking the number N of vehicles passing in a maximized signal period as an objective function, constructing a vehicle speed induction strategy of a signalized intersection, determining the number of vehicles passing through the intersection based on the optimized and adjusted optimal timing scheme, and inducing the vehicles to dynamically adjust the running speed. The invention optimizes the utilization rate of the green light, reduces unnecessary parking through vehicle speed guidance, is beneficial to effectively reducing fuel consumption and carbon emission, and improves the traffic capacity of intersections and the overall traffic efficiency.

Inventors

YAN LIXIN
ZHANG JIAHUI
LI ZHENYUN
ZHOU ZHIYI

Assignees

江西飞行学院

Dates

Publication Date: 20260508
Application Date: 20250926

Claims (7)

1. The traffic control method based on signal timing and vehicle speed induction bidirectional control is characterized by comprising the following steps of: Collecting dynamic traffic data of an intersection in real time, and calculating an optimal signal period C by adopting a Webster method according to the dynamic traffic data; determining an optimal timing scheme by adopting a double-loop phase structure according to the optimal signal period C; Taking the number N of vehicles passing in the maximized signal lamp period as an objective function, and carrying out optimization adjustment on the optimal timing scheme; Constructing a vehicle speed induction strategy of the signalized intersection, determining the number of vehicles passing through the intersection based on the optimized and adjusted optimal timing scheme, and inducing the vehicles to dynamically adjust the running speed; the vehicle speed induction strategy for constructing the signalized intersection comprises the following steps: the mth vehicle of the ith, j-th phase in the kth period satisfies the following constraint: , , , Wherein, the The lowest speed limit is set for the road; the highest speed limit of the road is set; is the expected headway between the m-1 and m vehicles; The current speed of the mth vehicle; is the distance from the current position of the mth vehicle to the signal intersection.
2. The traffic control method based on signal timing and vehicle speed induced bi-directional control according to claim 1, wherein the dual-loop phase structure is composed of a first loop phase and a second loop phase; the first loop phase is composed of a front phase Front phase Post phase And post phase The second loop phase consists of a front phase Front phase Post phase And post phase Composition; the prepositive phase Front phase Post phase And post phase Front phase Front phase Post phase And post phase The following conditions are satisfied: , , 。
3. The traffic control method based on signal timing and vehicle speed induced bidirectional control according to claim 1, wherein said calculating the optimal signal period C using Webster method comprises: , Wherein Y is the flow occupancy ratio, Is the total lost time.
4. The traffic control method based on signal timing and vehicle speed induced bi-directional control according to claim 1, wherein the objective function is: , Wherein, the The i, j-phase mth vehicle passes through the intersection or not.
5. The traffic control method based on signal timing and vehicle speed induced bi-directional control according to claim 4, wherein the condition whether the mth vehicle can pass through the intersection in the i, j phase is: , Wherein, the For the distance of the current position of the vehicle m from the signal intersection, speed Is the current speed of the vehicle m.
6. The traffic control method based on signal timing and vehicle speed induced bidirectional control according to claim 5, wherein the mth vehicle can pass through the intersection Is 1, and on the contrary, the number of the components is 1, Is 0: 。
7. The traffic control method based on signal timing and vehicle speed inducement bidirectional control according to claim 1, wherein the inducement of vehicle dynamic adjustment of the traveling speed comprises green light traffic inducement and red light traffic inducement; the green light traffic guidance comprises green light keeping current vehicle speed guidance, green light acceleration passing guidance and green light deceleration stopping guidance; The red light passing guidance comprises a red light keeping current vehicle speed guide, a red light deceleration passing guide and a red light deceleration parking guide.

Description

Traffic control method based on signal timing and vehicle speed induction bidirectional control Technical Field The invention relates to the field of intelligent traffic control, in particular to a traffic control method based on signal timing and vehicle speed induction bidirectional control. Background In urban traffic networks, intersections carry a large amount of traffic flow, which has a strong randomness. At present, most intersections still adopt fixed signal timing control, the green light time length of the intersections is preset and cannot be dynamically adjusted, and the real-time traffic requirements are difficult to adapt. During peak time, the fixed signal timing causes frequent parking and starting of the vehicle, thus forming a parking-starting cycle, not only reducing traffic efficiency, but also increasing fuel consumption and pollutant emission. In addition, because the sight is blocked, the driver is difficult to accurately judge the residual green light time, and the situation of stopping in advance or accelerating rapidly when the green light is close to the end possibly occurs, so that the green light utilization rate is reduced, and the traffic accident risk is increased. Compared with the signal control in fixed timing, the self-adaptive signal control can dynamically adjust the signal period and the green light duration according to traffic flow changes, so that congestion is reduced, and traffic efficiency is improved. However, existing adaptive signal control is mainly based on historical data modeling, and short-time traffic fluctuations are difficult to accurately predict. When the flow suddenly changes, the optimal response is lagged, and the real-time matching of the arrival condition of the vehicle is difficult. In addition, current signal control mainly focuses on timing optimization, but cannot be coordinated and regulated in combination with an intelligent internet-connected vehicle (CAV) driving strategy, so that real-time traffic information in an internet-of-vehicles environment is not fully utilized. Disclosure of Invention The invention aims to overcome the defects, and provides a traffic control method based on signal timing and vehicle speed induction bidirectional control, which not only optimizes the green light utilization rate, but also reduces unnecessary parking through vehicle speed guidance, thereby being beneficial to effectively reducing fuel consumption and carbon emission and improving the traffic capacity and the overall traffic efficiency of intersections. In order to achieve the above object, the present invention is specifically as follows: A traffic control method based on signal timing and vehicle speed induction bidirectional control comprises the following steps: Collecting dynamic traffic data of an intersection in real time, and calculating an optimal signal period C by adopting a Webster method according to the dynamic traffic data; determining an optimal timing scheme by adopting a double-loop phase structure according to the optimal signal period C; Taking the number N of vehicles passing in the maximized signal lamp period as an objective function, and carrying out optimization adjustment on the optimal timing scheme; and constructing a vehicle speed induction strategy of the signalized intersection, determining the number of vehicles passing through the intersection based on the optimized and adjusted optimal timing scheme, and inducing the vehicles to dynamically adjust the running speed. The invention further provides that the dual-loop phase structure consists of a first loop phase and a second loop phase; the first loop phase is composed of a front phase Front phasePost phaseAnd post phaseThe second loop phase consists of a front phaseFront phasePost phaseAnd post phaseComposition; the prepositive phase Front phasePost phaseAnd post phaseFront phaseFront phasePost phaseAnd post phaseThe following conditions are satisfied: , , 。 The invention further provides a method for calculating the optimal signal period C by using the Webster method, which comprises the following steps: , wherein Y is the flow occupancy ratio, Is the total lost time. The invention further provides that the objective function is: , Wherein x i,j,m is a binary variable, indicating whether the ith, jth phase mth vehicle passes through the intersection. The invention further provides that the condition whether the mth vehicle can pass through the intersection in the i phase and the j phase is as follows: , Wherein L i,j,m is the distance from the current position of the vehicle m to the signal intersection, and the speed v i,j,m is the current speed of the vehicle m. In the invention, if the mth vehicle can pass through the intersection, x i,j,m is 1, otherwise, x i,j,m is 0: 。 the invention further provides a vehicle speed induction strategy for constructing a signalized intersection, which comprises the following steps: the mth vehicle of the ith, j-th phase in t