Traffic inflow control method for traffic control road section

Abstract

The invention provides a method for controlling traffic inflow of a traffic control road section, which comprises the following steps of: S1, determining a target traffic control road section, and acquiring traffic information of the target traffic control road section; s2, determining a management and control period of the target traffic road section; s3, predicting the traffic inflow of the target management and control period based on the traffic information of the target traffic management and control road section, and performing traffic control according to the traffic inflow; according to the method, the traffic volume flowing into the target traffic control road section is determined according to different control periods through the historical traffic information of the target traffic control road section and the vehicle distribution characteristics on the road, the method can better adapt to urban road traffic requirements, and traffic congestion of the target traffic control road section can be effectively relieved.

Description

Technical Field

[0001] The present invention relates to a traffic control method, and in particular to a traffic inflow control method for a traffic control section. Background Art

[0002] With the increase in the number of vehicle holdings, urban road traffic congestion has become increasingly serious. To alleviate the traffic congestion in some sections, the following measures are usually taken: First, increasing road facilities. Since the existing urban planning has been established and formed, and the cost is extremely high, it is difficult to implement in the city. The second is to alleviate traffic congestion by traffic flow control.

[0003] Regarding the second method, in the prior art, traffic flow control generally includes license plate number restriction during morning and evening rush hours, all-day license plate number restriction, restricted travel on target sections, and signal flow control, etc. However, the license plate number restriction strategies are all based on the regional all-day traffic volume, and it is impossible to accurately and effectively control the dynamic and time-varying traffic volume of the section, and it brings inconvenience to people's travel. Signal flow control is mainly based on empirical strategies and cannot control the traffic flow according to the expected speed of the controlled section.

[0004] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a traffic inflow control method for a traffic control section, which determines the traffic volume flowing into the target traffic control section according to different control cycles by analyzing the historical traffic information of the target traffic control section and the distribution characteristics of vehicles on the road, and is more adaptable to the urban road traffic demand, and can effectively alleviate the traffic congestion of the target traffic control section.

[0006] A traffic inflow control method for a traffic control section provided by the present invention includes the following steps:

[0007] S1. Determine the target traffic control section and obtain the traffic information of the target traffic control section;

[0008] S2. Determine the control cycle of the target traffic section;

[0009] S3. Predict the traffic inflow volume of the target control cycle based on the traffic information of the target traffic control section and perform traffic control according to the traffic inflow volume.

[0010] Further, the traffic information includes the length of the target traffic control section, the number of lanes, the vehicle speed, and the headway.

[0011] Further, in step S3, the traffic inflow volume of the target control cycle is predicted by the following method:

[0012] Determine the traffic outflow volume \(N\) of the target control period \(i\). wdi ;

[0013] Determine the actual number of vehicles \(N\) on the target traffic control section during the previous control period of the target control period \(i\). i-1,n And the vehicle control inflow volume \(N\). i-1,c ;

[0014] Determine the traffic inflow volume \(N\) of the target control period \(i\). i,c :

[0015] \(N\) i,c = \(N\) i,e - \(N\) i,n :

[0016] \(N\) i,n = \(N\) i-1,n + \(N\) i-1,c - \(N\) wdi , where \(N\) i,e is the expected number of vehicles on the target traffic control section.

[0017] Furthermore, the traffic outflow volume \(N\) of the target control period \(i\) is determined by the following method: wdi :

[0018] \(N\) wdi = \(\alpha N\) wd +(1 - \(\alpha\))\(N\) i ;

[0019] where: \(N\) wd is the average traffic outflow volume in the first three weeks of the target traffic control section, \(N\) i is the average traffic outflow volume in the first three control periods of the target traffic control section during the control period \(i\), and \(\alpha\) is a coefficient and \(\alpha\in[0,1]\).

[0020] Furthermore, the average traffic outflow volume \(N\) in the first three weeks of the target traffic control section is determined by the following method: wd :

[0021] \(N\) wd = \(\beta\) w-1 \(N\) (w-1)di + \(\beta\) w-2 \(N\) (w-2)di + \(\beta\) w-3 \(N\) (w-3)di

[0022] \(\beta\) w-1 + \(\beta\) w-2 + \(\beta\) w-3 = 1 and \(\beta\) w-1 > \(\beta\) w-2 > \(\beta\) w-3 ;

[0023] where: \(N\)(w-1)di is the traffic outflow of the target traffic control section in the i-th traffic control cycle on the d-th day of the (w - 1)-th week, and β w-1 is a coefficient.

[0024] Furthermore, the average traffic outflow N of the target traffic control section in the first three control cycles of the control cycle i is determined by the following method i :

[0025]

[0026] where: N wd(i-1) is the traffic outflow in the previous cycle of the current control cycle i, and β i-1 is a coefficient.

[0027] Furthermore, the expected number of vehicles N is determined by the following method i,e :

[0028]

[0029] where: L is the length of the target traffic control section, t is the headway, v is the vehicle speed, M is the number of lanes, δ is a coefficient, and f 0 is the outflow rate, and T is the length of the control cycle i.

[0030] Advantages of the present invention: Through the present invention, according to the historical traffic information of the target traffic control section and the vehicle distribution characteristics on the section, combined with the current traffic flow and the expected traffic outflow of the target traffic control section, the inflow traffic is cyclically controlled according to the expected speed of the traffic control section, which can realize the control of the traffic inflow of the traffic control section in different cycles, ensure that the vehicles on the traffic control section run within a reasonable speed range, thus not only ensuring the user's passing efficiency but also reducing the traffic congestion of the target traffic control section. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the drawings and embodiments:

[0032] Figure 1 is the flowchart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following further details the present invention:

[0034] A method for controlling the traffic inflow of a traffic control section provided by the present invention includes the following steps:

[0035] S1. Determine the target traffic control section and obtain the traffic information of the target traffic control section;

[0036] S2. Determine the control cycle of the target traffic section;

[0037] S3. Predict the traffic inflow volume of the target control period based on the traffic information of the target traffic control section, and perform traffic control according to the traffic inflow volume. That is, traffic diversion and scheduling are carried out at the upstream traffic node of the entrance of the target traffic control section (the node refers to the position of the intersection on the road), and only the number of vehicles equal to the traffic inflow volume is allowed to enter the target traffic control section; through the above method, based on the historical traffic information of the target traffic control section and the vehicle distribution characteristics on the road, the traffic volume flowing into the target traffic control section is determined according to different control periods, which can better meet the urban road traffic demand and effectively relieve the traffic congestion of the target traffic control section.

[0038] Among them: the traffic information includes the length of the target traffic control section, the number of lanes, the vehicle speed, and the headway.

[0039] In this embodiment, in step S3, the traffic inflow volume of the target control period is predicted by the following method:

[0040] Determine the traffic outflow volume N of the target control period i wdi ;

[0041] Determine the actual number of vehicles N in the target traffic control section during the previous control period of the target control period i i-1,n and the vehicle control inflow volume N i-1,c ;

[0042] Determine the traffic inflow volume N of the target control period i i,c :

[0043] N i,c = N i,e - N i,n :

[0044] N i,n = N i-1,n + N i-1,c - N wdi where N i,e is the expected number of vehicles in the target traffic control section.

[0045] Specifically, the traffic outflow volume N of the target control period i wdi is determined by the following method:

[0046] N wdi = αN wd + (1 - α)N i ;

[0047] Among them: N wd is the average traffic outflow volume in the first three weeks of the target traffic control section, where a week here refers to seven days as a week, N iis the average traffic outflow of the target traffic control section in the first three control cycles of the control cycle i, α is a coefficient and α ∈ [0, 1].

[0048] The average traffic outflow N of the target traffic control section in the first three weeks is determined by the following method wd :

[0049] N wd = β w-1 N (w-1)di + β w-2 N (w-2)di + β w-3 N (w-3)di

[0050] β w-1 + β w-2 + β w-3 = 1 and β w-1 > β w-2 > β w-3 ;

[0051] where: N (w-1)di is the traffic outflow of the target traffic control section in the i-th traffic control cycle on the d-th day of the (w - 1)-th week, β w-1 is a coefficient.

[0052] The average traffic outflow N of the target traffic control section in the first three control cycles of the control cycle i is determined by the following method i :

[0053]

[0054] where: N wd(i-1) is the traffic outflow of the previous cycle of the current control cycle i, β i-1 is a coefficient.

[0055] The expected number of vehicles N is determined by the following method i,e :

[0056]

[0057] where: L is the length of the target traffic control section, t is the headway, v is the vehicle speed, M is the number of lanes, δ is a coefficient, f 0 is the outflow rate, T is the length of the control cycle i.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for controlling traffic inflow in a traffic control section, characterized by: The following steps are involved: S1. Determine the target traffic control section and obtain traffic information of the target traffic control section; S2. Determine the control cycle of the target traffic section; S3. Predict the traffic inflow volume of the target control period based on the traffic information of the target traffic control section, and perform traffic control according to the traffic inflow volume.

2. The method for controlling traffic inflow on a traffic-controlled section according to claim 1, characterized in that: The traffic information includes the length of the target traffic control section, the number of lanes, vehicle speed and headway.

3. The method for controlling traffic inflow on a traffic-controlled section according to claim 1, characterized in that: In step S3, the traffic inflow of the target control period is predicted by the following method: Determine the traffic outflow N of the target control period i wdi ; Determine the actual number of vehicles N on the target traffic control section in the previous control cycle of the target control cycle i i-1,n and the vehicle control inflow N i-1,c ; Determine the traffic inflow N of the target control period i i,c : N i,c =N i,e -N i,n : N i,n =N i-1,n +N i-1,c -N wdi , where N i,e is the expected number of vehicles on the target traffic control section.

4. The method for controlling traffic inflow on a traffic-controlled section according to claim 3 is characterized by: Traffic outflow N in target control cycle i wdi Determined by: N wdi =αN wd +(1-α)N i ; Where: N wd is the average traffic outflow of the target traffic control section in the first three weeks, N i is the average traffic outflow of the target traffic control section in the first three control cycles of control cycle i, α is the coefficient and α∈[0,1].

5. The method for controlling traffic inflow on a traffic-controlled section according to claim 4, characterized in that: The average traffic outflow N of the target traffic control section in the first three weeks is determined by the following method wd : Where: N (w-1)di is the traffic outflow of the target traffic control section on the ith traffic control cycle on the dth day of the w-1th week, β w-1 is the coefficient.

6. The method for controlling traffic inflow in a traffic-controlled section according to claim 4, characterized in that: The average traffic outflow N of the target traffic control section in the first three control cycles of control cycle i is determined by the following method i : Where: N wd(i-1) is the traffic outflow in the previous cycle of the current control cycle i, β i-1 is the coefficient.

7. The method for controlling traffic inflow in a traffic-controlled section according to claim 3, characterized in that: The expected number of vehicles N is determined by the following method i,e : Where: L is the length of the target traffic control section, t is the headway, v is the vehicle speed, M is the number of lanes, δ is the coefficient, f0 is the outflow rate, and T is the length of the control period i.

Images