Estimation method and system for cross-sectional traffic volume of expressway, and medium

Abstract

An estimation method and system for the cross-sectional traffic volume of an expressway, and a medium. The method comprises: acquiring the traffic volumes of each entrance and each exit in a road section under test of an expressway (S101); on the basis of the traffic volumes of each entrance and each exit in said road section, obtaining the traffic volume of an entrance outside said road section by means of calculation (S102); and calculating the traffic volume of each cross section of said road section on the basis of the traffic volumes of each entrance and each exit in said road section and the traffic volume of the entrance outside said road section (S103). Data of entrances and exits of an expressway is rationally utilized, and the utilized data is easily collected; thus, the cross-sectional traffic volume of a corresponding road section can be accurately estimated, and on-site detection is also avoided, thereby greatly reducing the consumption of manpower and material resources.

Description

Method, medium and system for estimating traffic volume on expressway sections

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on August 1, 2023, with application number 202310961563.6 and application name “Method, medium and system for estimating traffic volume on a highway section”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of highway cross-section traffic volume, and in particular to a method, medium and system for estimating highway cross-section traffic volume. Background Art

[0004] With the development of society and the expansion of cities, the mileage of roads and the number of cars are increasing rapidly. Traffic congestion is becoming one of the major issues hindering urban and economic development. Traffic volume forecasting can serve as an important basis for traffic decision-making, effectively carry out traffic control, and improve the efficiency of road traffic operations.

[0005] Currently, cross-section traffic volume forecasting methods include time series decomposition, exponential smoothing, and gray prediction techniques, leveraging medium-, long-, and recent measured traffic volume data. However, these methods are complex and lack practicality. Therefore, estimating cross-section traffic volume on a specific road section typically involves sending personnel to conduct on-site surveys of traffic flow or using on-site instrumentation. However, manual field surveys are often limited in duration, often limited to a few days and unable to be continuously observed year-round. The data is highly biased, and prolonged field work can be extremely demanding on human endurance.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a method, medium, and system for estimating highway cross-sectional traffic volume to address the problem that the existing technology does not fully utilize statistical information from highway entrance and exit toll stations and adopts on-site manual surveys, resulting in large errors in the survey results of highway cross-sectional traffic volume.

[0008] In a first aspect, a method for estimating traffic volume on a highway section is provided, comprising:

[0009] Obtain the traffic volume at each entrance and exit of the tested section of the expressway;

[0010] Calculate the traffic volume of the entrance outside the road section to be tested based on the traffic volume of each entrance and each exit within the road section to be tested;

[0011] The traffic volume of each section of the road section to be measured is calculated based on the traffic volume of each entrance and each exit within the road section to be measured, as well as the traffic volume of the entrance outside the road section to be measured.

[0012] In a second aspect, a computer-readable storage medium is provided, on which computer program instructions are stored; when the computer program instructions are executed by a processor, a method for estimating highway section traffic volume as in the embodiment of the first aspect is implemented.

[0013] In a third aspect, a system for estimating highway section traffic volume is provided, comprising: a computer-readable storage medium as in the embodiment of the second aspect.

[0014] In this way, the embodiment of the present application rationally utilizes the data of the entrances and exits of the expressway. The data utilized is easy to collect, which can not only accurately estimate the cross-sectional traffic volume of the corresponding road section, but also avoid on-site detection, greatly reducing the consumption of manpower and material resources. The prediction method is relatively simple, with clear logic and steps, and is easy to form code, which greatly reduces the difficulty of learning, is conducive to promotion and application, and facilitates the development of a module specifically for calculating cross-sectional traffic volume in the existing highway big data platform system, laying the foundation for future highway management and decision-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] FIG1 is a flow chart of a method for estimating highway cross-section traffic volume according to an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of a highway section. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] The present embodiment discloses a method for estimating the traffic volume of a highway section. It should be understood that a highway includes two directions of travel: up and down. Therefore, traffic flow is also divided into up and down. Therefore, the traffic volume of a certain section in the present embodiment is the sum of the up and down traffic volumes. The section in the present embodiment refers to the section where the entrance and exit of the same position of the road section to be measured are located. As shown in Figure 1, the method of the present embodiment includes the following steps:

[0020] Step S101: Obtain the traffic volume at each entrance and each exit of the section of the expressway to be tested.

[0021] As shown in Figure 2, it is assumed that the road section to be tested has n entrances A, B, ..., I, ..., N and n exits A', B', ..., I', ..., N'. The entrances and exits outside the road section to be tested are represented by X and X' respectively.

[0022] Let z represent the traffic volume of an entrance in the road section to be measured, and let j represent the number of the entrance and exit at a section in the road section to be measured (it should be understood that the entrance and exit at the same section have the same number), then z j Denotes the traffic volume of the jth entrance in the road section to be tested. Let z′ denote the traffic volume of an exit in the road section to be tested, then z′ j represents the traffic volume at the jth exit in the road section to be tested, where j = 1, 2, 3, ..., i, ..., n, i ≠ n.

[0023] The traffic volume at each entrance and exit within the road section to be tested can generally be obtained through statistics of vehicle information recorded at each entrance and exit.

[0024] Step S102: Calculate the traffic volume of the entrance outside the road section to be measured based on the traffic volume of each entrance and each exit within the road section to be measured.

[0025] It should be understood that the entrance outside the section to be tested refers to all entrances outside the section to be tested, and the exit outside the section to be tested refers to all exits outside the section to be tested. Since the entrances and exits outside the section to be tested are not within the scope of the entrances and exits within the section to be tested investigated in the embodiment of the present application, vehicles entering the highway from the entrance outside the section to be tested are vehicles of unknown origin, and vehicles exiting the highway from the exit outside the section to be tested are vehicles of unknown destination. The traffic volume at the entrance outside the section to be tested is unknown and needs to be calculated based on the traffic volume of each entrance and each exit within the known section to be tested. Specifically, this step includes the following process:

[0026] 1. Based on the traffic volume of each entrance and each exit in the road section to be measured, the traffic volume of the entrance outside the road section to be measured based on each exit in the road section to be measured is calculated.

[0027] Vehicles that enter the highway from an entrance within the tested section cannot exit the highway from the exit located in the same section as the entrance. Taking Figure 2 as an example, a vehicle that enters from entrance A cannot exit from entrance A'. The directions in which it can exit the highway are only B', C', ..., I', ..., N' and X', a total of n directions. Similarly, a vehicle that enters from entrance B cannot exit from entrance B'. The directions in which it can exit the highway are only A', C', ..., I', ..., N' and X', a total of n directions. The same is true for other entrances. In this way, the probability of a vehicle traveling from entrance A to exit I' is Then the traffic flow from the highway exit I′ is Similarly, the traffic volume of vehicles traveling from other entrances to exit I' is The traffic volume entering the highway from entrance X outside the test section is x. The traffic volume can exit the highway from any exit within the test section or directly pass through the test section and exit the highway from exit X' outside the test section. There are n+1 directions in total. The probability of exiting the highway from exit I' is The traffic volume entering Exit I' and exiting the highway is Based on the above analysis, an equation is established to determine the traffic volume at each exit and the traffic volume at each entrance within the road section to be tested, as follows:

[0028] The general formula can be summarized as: Among them, x j represents the traffic volume of the entrance outside the tested section based on the j-th exit in the tested section, m represents the number of the entrance and exit at a section in the tested section, then m=1, 2, 3, ..., i, ...n, i≠n.

[0029] By transforming the above general formula, the calculation formula for the traffic volume of the entrance outside the tested section based on each exit in the tested section is as follows:

[0030] 2. Calculate the average of the traffic volume of the entrances outside the road section to be measured based on each exit in the road section to be measured, and obtain the traffic volume of the entrances outside the road section to be measured.

[0031] Specifically, the calculation formula for the traffic volume at the entrance outside the road section to be tested is as follows:

[0032] in, Indicates the traffic volume at the entrance outside the road section to be tested.

[0033] In this way, the traffic volume of the entrance outside the road section to be measured can be obtained through this step.

[0034] Step S103: Calculate the traffic volume of each section of the road section to be measured based on the traffic volume of each entrance and each exit within the road section to be measured, and the traffic volume of the entrance outside the road section to be measured.

[0035] Specifically, this step includes the following process:

[0036] 1. Based on the traffic volume at each entrance and each exit within the road section to be measured, as well as the traffic volume at entrances outside the road section to be measured, calculate a first traffic volume total of vehicles entering the expressway from an entrance before a selected entrance within the road section to be measured and passing through the section where the selected entrance is located; a second traffic volume total of vehicles entering the expressway from entrances outside the road section to be measured and passing through the section where the selected entrance is located; a third traffic volume total of vehicles entering the expressway from a selected entrance within the road section to be measured and passing through the section where the selected entrance is located; and a fourth traffic volume total of vehicles entering the expressway from an entrance after a selected entrance within the road section to be measured and passing through the section where the selected entrance is located.

[0037] Take the section II' where the entrance I and exit I' are selected as an example for explanation, where the selected entrance I is the i-th entrance in the section to be tested. The details are as follows:

[0038] (1) Vehicles entering the highway from the entrance before the selected entrance I within the section to be tested

[0039] Vehicles entering the highway from entrance A pass through section II'. Their exit from the highway must be any exit between exit I' and exit N' within the tested section or exit X' outside the tested section. Then the traffic flow of vehicles entering the highway from entrance A passing through section II' is

[0040] Vehicles entering the highway from entrance B pass through section II'. Their exit from the highway must be any exit between exit I' and exit N' within the tested section or exit X' outside the tested section. Then the traffic flow of vehicles entering the highway from entrance B passing through section II' is

[0041] Similarly, the traffic volume of vehicles entering the expressway from other entrances before entrance I passing through section II′ can be obtained. Thus, the calculation formula for the first traffic volume Z1 of vehicles entering the expressway from the entrance before the selected entrance I in the measured section passing through section II′ is as follows:

[0042] (2) Vehicles entering the highway from entrance X outside the road section to be tested

[0043] Vehicles entering the expressway from entrance X outside the test section must exit the expressway through section II′ at any exit between exit I′ and exit N′ of the test section or at exit X′ outside the test section. The second total traffic volume Z2 of vehicles entering the expressway from entrances outside the test section passing through section II′ is calculated as follows:

[0044] (3) Vehicles entering the highway from the selected entrance I within the section to be tested

[0045] Vehicles entering the highway from the entrance I in the section to be tested must pass through section II' no matter which exit they take. Therefore, the third total traffic volume Z3 of vehicles entering the highway from the selected entrance I in the section to be tested passing through section II' is the traffic volume of the selected entrance I, that is, Z3 = z i .

[0046] (4) Vehicles entering the highway from the entrance after the selected entrance I within the section to be tested

[0047] A vehicle entering the expressway from an entrance after the selected entrance I in the section to be tested must exit the expressway at any exit between exit A' and exit I' in the section to be tested after passing through section II'.

[0048] For example, the traffic volume of vehicles entering the highway from entrance I+1 in the tested section passing through section II′ is

[0049] For example, the traffic volume of vehicles entering the highway from entrance I+2 in the tested section passing through section II′ is

[0050] By analogy, the fourth total traffic volume Z4 of vehicles entering the highway from the entrance after the selected entrance I in the road section to be tested and passing through section II′ is calculated as follows:

[0051] 2. Calculate the sum of the first traffic volume, the second traffic volume, the third traffic volume and the fourth traffic volume to obtain the traffic volume of the section where the selected entrance is located.

[0052] The traffic volume of section II' of the road section to be tested is the sum of the four types of traffic volumes mentioned above. The calculation formula for the traffic volume of section II' of the road section to be tested is as follows:

[0053] Z I-I′ =Z1+Z2+Z3+Z4.

[0054] In addition, an embodiment of the present application also provides a computer-readable storage medium, on which computer program instructions are stored; when the computer program instructions are executed by a processor, a method for estimating highway section traffic volume as described in the above embodiment is implemented.

[0055] In addition, an embodiment of the present application also provides a highway section traffic volume estimation system, including: a computer-readable storage medium as described in the above embodiment.

[0056] In summary, the embodiments of the present application rationally utilize the data of highway entrances and exits. The data utilized is easy to collect, which can not only accurately estimate the cross-sectional traffic volume of the corresponding road section, but also avoid on-site detection, greatly reducing the consumption of manpower and material resources. The prediction method is relatively simple, with clear logic and steps, and is easy to form code, which greatly reduces the difficulty of learning, is conducive to promotion and application, and facilitates the development of a module specifically for calculating cross-sectional traffic volume in the existing highway big data platform system, laying the foundation for future highway management and decision-making.

[0057] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for estimating the traffic volume of a highway section, characterized in that: include: Obtain the traffic volume at each entrance and each exit within the tested section of the expressway; Calculate the traffic volume of the entrance outside the road section to be tested according to the traffic volume of each entrance and each exit in the road section to be tested; The traffic volume of each section of the road section to be measured is calculated based on the traffic volume of each entrance and each exit in the road section to be measured and the traffic volume of the entrance outside the road section to be measured.

2. The method for estimating the traffic volume of a highway section according to claim 1, characterized in that: The step of calculating the traffic volume of the entrance outside the road section to be tested includes: Calculate the traffic volume of the entrance outside the road section to be tested based on each exit in the road section to be tested according to the traffic volume of each entrance and each exit in the road section to be tested; The average of the traffic volume of the entrance outside the road section to be measured based on each exit in the road section to be measured is calculated to obtain the traffic volume of the entrance outside the road section to be measured.

3. The method for estimating the traffic volume of a highway section according to claim 2, characterized in that: The calculation formula for the traffic volume of the entrance outside the road section to be tested based on each exit in the road section to be tested includes: Among them, x j represents the traffic volume of the entrance outside the section to be tested based on the j-th exit in the section to be tested, z represents the traffic volume of an entrance in the section to be tested, z′ represents the traffic volume of an exit in the section to be tested, j and m both represent the numbers of the entrance and exit at a section in the section to be tested, j=1, 2, 3, ..., i, ...n, m=1, 2, 3, ..., i, ...n.

4. The method for estimating the traffic volume of a highway section according to claim 3, characterized in that: The step of calculating the traffic volume of each section of the road section to be tested includes: According to the traffic volume of each entrance and each exit in the section to be tested, and the traffic volume of the entrance outside the section to be tested, calculate and obtain a first traffic volume total of vehicles entering the expressway from an entrance before a selected entrance in the section to be tested and passing through the section where the selected entrance is located, a second traffic volume total of vehicles entering the expressway from an entrance outside the section to be tested and passing through the section where the selected entrance is located, a third traffic volume total of vehicles entering the expressway from a selected entrance in the section to be tested and passing through the section where the selected entrance is located, and a fourth traffic volume total of vehicles entering the expressway from an entrance after a selected entrance in the section to be tested and passing through the section where the selected entrance is located; The sum of the first total traffic volume, the second total traffic volume, the third total traffic volume and the fourth total traffic volume is calculated to obtain the traffic volume of the section where the selected entrance is located.

5. The method for estimating the traffic volume of a highway section according to claim 4, characterized in that: The calculation formula for the first total traffic volume Z1 of vehicles entering the expressway from the entrance before the selected entrance I in the section to be tested passing through the section II′ includes: The selected entrance I is the i-th entrance in the road section to be tested.

6. The method for estimating the traffic volume of a highway section according to claim 4, characterized in that: The calculation formula for the second total traffic volume Z2 of vehicles entering the expressway from the entrance outside the road section to be tested passing through the section II′ includes: The selected entrance I is the i-th entrance in the road section to be tested. Indicates the traffic volume at the entrance outside the road section to be tested.

7. The method for estimating the traffic volume of a highway section according to claim 4, characterized in that: The third total traffic volume Z3 of vehicles entering the highway from the selected entrance I in the section to be tested passing through section II′ is the traffic volume of the selected entrance I, wherein the selected entrance I is the i-th entrance in the section to be tested.

8. The method for estimating the traffic volume of a highway section according to claim 4, characterized in that: The calculation formula for the fourth total traffic volume Z4 of vehicles entering the expressway from the entrance after the selected entrance I in the section to be tested passing through the section II′ includes: The selected entrance I is the i-th entrance in the road section to be tested.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by a processor, the method for estimating the cross-sectional traffic volume of a highway according to any one of claims 1 to 8 is implemented.

10. A highway section traffic volume estimation system, characterized in that: include: The computer readable storage medium of claim 9.

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