WO2012013056A1

WO2012013056A1 - Traffic information evaluation method and device thereof

Info

Publication number: WO2012013056A1
Application number: PCT/CN2011/073682
Authority: WO
Inventors: 宋彬; 罗颖磊; 顾鸣
Original assignee: 北京世纪高通科技有限公司
Priority date: 2010-07-29
Filing date: 2011-05-05
Publication date: 2012-02-02
Also published as: CN101908276A

Abstract

A traffic information evaluation method and device thereof are provided. The method involves testing a test road section by a road test track equipment to obtain a sample track data of the test road section; processing the sample track data according to a standard calculation manner of the road test to obtain standard answer route information; according to the standard answer route information, evaluating the accuracy of route information obtained by a traffic system according to real-time dynamic traffic flow information.

Description

Method and device for evaluating traffic information

This application is required to be submitted to the Chinese Patent Office on July 29, 2010, and the application number is 2 01 01 024 1 1 0 3. 9. The Chinese patent application titled "Method and Device for Evaluating Traffic Information" is preferred. The entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to the field of traffic information applications, and in particular, to a method and apparatus for evaluating traffic information.

Background technique

At present, people's living standards are constantly improving, and road traffic is expanding. However, due to the rapid growth of vehicles and traffic, traffic contradictions are also very prominent. In order to ensure the passage time, people pay more and more attention to road conditions. Therefore, the intelligent transportation system is operated, and the intelligent transportation system can indicate to the user whether the current road condition is congested or not, based on the detected real-time dynamic traffic flow information.

However, as traffic demand increases, the reliability of road condition information obtained from real-time dynamic traffic flow information is also particularly important. If the user refers to inaccurate road condition information during driving, it is not only bad for travel, but also affects traffic management, resulting in traffic congestion, traffic accidents, and the like. Summary of the invention

Embodiments of the present invention provide a method and apparatus for evaluating traffic information, which improves reliability of road condition information by providing service information, has high usability, and can provide a good experience for users.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

A method of evaluating traffic information, including:

The test road segment is tested by the drive track device to obtain sample track data of the test road segment;

The sample trajectory data is processed according to a road test standard calculation method to obtain standard answer road condition information;

The accuracy of the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information is evaluated according to the standard answer road condition information. A device for evaluating traffic information, including:

a sample track acquiring unit, configured to test the test road segment by the road test track device to obtain sample track data of the test road segment;

a standard answer processing unit, configured to process the sample trajectory data according to a road test standard calculation manner to obtain standard answer road condition information;

And an evaluation unit, configured to evaluate, according to the standard answer road condition information, an accuracy of the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information.

The technical solution provided by the invention has the following beneficial effects: processing the obtained sample trajectory data according to the road test standard calculation method to obtain the standard answer road condition information of the test road segment, and increasing the accuracy of the standard answer road condition information, and then according to the standard The answer road condition information evaluates the road condition information obtained by the traffic system, so as to determine the reliability of the road condition information provided by the traffic system, which can prevent the user from referring to inaccurate road condition information during driving, and can reduce the impact on traffic management. And the evaluation result is actually a kind of service information provided by the traffic management department or the operator for the user, which is convenient for the user to obtain, has strong usability, and can bring a good experience to the user.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a method for evaluating traffic information in Embodiment 1 of the present invention;

2 is a flowchart of a method for evaluating traffic information in Embodiment 1 of the present invention;

3 is a schematic diagram of waiting for a traffic light area in Embodiment 1 of the present invention;

4 is a flowchart of a method for obtaining standard answer road condition information according to Embodiment 1 of the present invention; FIG. 5 is a schematic diagram of time cut selection according to Embodiment 1 of the present invention;

Figure 6 is a block diagram showing the structure of an apparatus for evaluating traffic information in Embodiment 2 of the present invention.

detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. Moreover, the following embodiments are all optional of the present invention, and the order of the embodiments and the number of the embodiments are independent of the preferred execution order.

Example 1

This embodiment will provide a method for evaluating traffic information in conjunction with the schematic diagram 1. As shown in FIG. 2, the method includes:

Step 101: Test the test section by using a road test trajectory device to obtain sample trajectory data of the test section.

Specifically, when the test vehicle enters the planned test section, the road test trajectory device is turned on, and the road test trajectory device targets the test vehicle, and records the trajectory point of the test vehicle on the test road section at each moment, and each trajectory point carries The track point data with the track point is: sample track data, which includes information such as the speed of the vehicle to be tested at a certain moment at a certain time, thereby acquiring the vehicle speed of the test vehicle at a certain spatial position at a certain moment in the field. For example: At 8:02, the coordinates are (XI, Y1), the vehicle speed is VI km / h, etc. In addition, when the test vehicle enters the non-test road section, it is necessary to turn off the road test track device in time. When returning to the test road section, the road test track device needs to be turned on in time.

Preferably, the above-mentioned drive track device preferably has a function of recording a high frequency track point (recording one point per second). For example, DG100 can obtain unencrypted high frequency sample track point data; Trimble PDA can obtain encrypted high frequency sample track point data.

Step 102: Process the sample trajectory data according to a road test standard calculation manner to obtain standard answer road condition information.

It should be noted that, in the process of obtaining the standard answer road condition information, it is also necessary to wait for the traffic light time when passing the test road section according to the waiting traffic time rule and the sample track data.

Among them, the waiting time for the traffic light is as follows: There is no traffic light on the high speed and fast road. Equipment, regardless of waiting for the traffic light time, that is, waiting for the traffic light time is 0; the implementation of other roads, the implementation of the traffic light deduction principle, including the following:

From the test section intersection to the 1/3 of the length of the section, it is considered to be the traffic light waiting area (when the length of the section is more than 200 meters, 200 meters is considered as the traffic waiting area; when the length of the section is less than 50 meters, It is considered to be a traffic light waiting area at 50 meters. It is necessary to deduct the relatively crowded GPS point time in this area. When there are several crowded GPS points in this area, only the closest time to the intersection is deducted.

For example, as shown in FIG. 3, the sample trajectory data recorded by the trajectory trajectory device includes the sample trajectory data recorded by the trajectory trajectory device, as shown in FIG. 3, according to the waiting traffic light time rule and the sample trajectory data. Time, position coordinates, and speed, the length of the waiting area start and end position track points N1 to N2 can be known according to the waiting traffic light time rule. Therefore, the time point of the track point N1 and the track point N2, the time difference between the N1 time point and the N2 time point can be known, that is, the waiting traffic time in the waiting area of the traffic light. Where M represents the test road length and M represents the traffic light waiting area;

Preferably, as shown in FIG. 4, the method for processing the sample trajectory data according to the road test standard calculation manner in step 102 to obtain the standard answer road condition information is as follows:

401. Acquire a running speed when passing the test section according to the length of the test section and the travel time of the test section, that is, the following formula: driving speed = ^3⁄4ϋ^ (unit: km/hour)

Driving time

The travel time is: a difference between a travel time in the sample trajectory data and a waiting time for a traffic light when passing the test road segment;

For example: As shown in Figure 1, the cornerstone data is actually a cornerstone map. According to the location table (the location table is specifically RTIC format in this embodiment) and the base map, the test road segment can be found in the base map, so as to know Test the length of the road segment. According to the travel time in the sample trajectory data, and the waiting time for waiting for the traffic light according to the waiting time rule of the traffic light, the travel time can be obtained and passed. The above formula can calculate the driving speed. The travel time may be the difference between the time point of the test road segment intersection in the sample trajectory data and the time point after passing the test road segment.

And searching for a corresponding standard answer road condition information in the road congestion rule according to the traveling speed and the identifier corresponding to the test road segment, where the road congestion rule includes an identifier according to different driving speeds and test road segments. Corresponding to the defined road condition information.

The above road congestion rules can be as shown in Table 1 below:

Among them, RTIC-Level is equivalent to the identification of the test section. Because in the base map or the position table of the RTIC format, each road segment is marked, so in the actual application, the traffic system identifies the test road segment through the identification of the road segment, and the setting standard of the road segment identifier is also set with the traffic system. The standard of the identification is consistent, so that when the road condition information provided by the transportation system is evaluated by the standard answer road condition information of the test section, the two indicate the same road section, thereby ensuring that the two are the same The road condition information at the spatial position is compared.

For example, if the test section is the main road (RTIC-Leve is 3), the exercise speed is 30. Referring to the above table, it can be seen that the current standard road condition information of the main road is unblocked.

The above mentioned that the identification of the test section ensures that the standard answer road condition information is consistent with the road condition information provided by the traffic system. In addition, it is necessary to ensure that the standard answer road condition information and the traffic condition information provided by the traffic system are in time position. Consistent, that is, to ensure that the standard answer road condition information and the road condition information provided by the transportation system are the same road segment, the road condition information within the same time period, which is comparable, and also ensures the accuracy of the evaluation results. This can be achieved by: selecting a time slice synchronized with the traffic system according to a time cut rule.

Because the road condition information in the traffic system is transmitted according to time interception, that is, the road condition information in the interval time is transmitted at a certain time, if the above-mentioned standard answer road condition information is also transmitted according to the same time as the traffic system, then Ensure that the standard answer road condition information is consistent with the road condition information provided by the transportation system in time position.

The above time-cutting rules are as follows:

Principle 1: In the method of this embodiment, the generated timestamp is a standard timestamp of 00 minutes, 05 minutes, and so on, and represents the traffic information of the first 5 minutes;

Principle 2: When the entry and exit times of the test vehicle are exactly included in a standard time range, a time stamp of this standard time range is generated;

Principle 3: When the test vehicle's entry and exit times span a standard timestamp, then select the timestamp that is timed by this timestamp;

Principle 4: When the test vehicle's entry and exit times span 2 standard timestamps, then select a timestamp that contains the full standard time range;

Principle 5: When the test vehicle's entry and exit times span 3 or more standard time stamps, then select the one that contains the closest time to the standard time range that is closest to the exit time; for example, refer to Table 2 below. Main principle entry time exit time selection time cut

08:04 08:05

Principle 2 08:01

08: 11 08: 10

Principle 3 08:06

08: 14 08: 15

08:09

08: 16 08: 15

Principle 4 08:06

08:26 08:25

Principle 5 08:06 Alternatively, referring to Figure 5, Figure 5 shows a schematic diagram of the test vehicle passing through a test section within two time periods and a diagram of the test vehicle passing through a test section at more than two times. Among them, Nodel - Node2: corresponds to a section of the RTIC format location table selected, Node2 -

Node3, the same reason; EPOCH: In this embodiment, the 5 minute time interception; Avg represents: the standard answer road condition information obtained by the formula 1.

Step 103: Evaluate the accuracy of the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information according to the standard answer road condition information.

Specifically, the step 103 is implemented as: comparing the road condition information acquired by the traffic system according to the real-time dynamic traffic flow information with the standard answer road condition information at the same time stamp, where the road condition information acquired by the transportation system is indicated The road segment corresponds to the test road segment;

If the acquired road condition information is the same as the standard answer road condition information, evaluating the road condition information obtained by the transportation system according to the real-time dynamic traffic flow information is accurate; otherwise, evaluating the road condition obtained by the transportation system according to the real-time dynamic traffic flow information. The information is inaccurate.

For example: The test road section is the main road (the test road section is marked 3 in the traffic system). When the time is cut off at 08:05, the standard answer road condition information is congestion; correspondingly, the traffic system corresponding identifier is 3 (in the traffic system) The section of the road marked as 3 roads is cut off at 08:05, according to The road condition information acquired by the real-time dynamic traffic flow information is slow. Therefore, it is inaccurate or incorrect to evaluate the road condition information acquired by the traffic system according to the real-time dynamic traffic flow information.

Through the method provided in this embodiment, the road condition information acquired according to the real-time dynamic traffic flow information can be reliably and credibly evaluated, which can prevent the user from referring to inaccurate road condition information during driving, and can reduce the impact on traffic management. Moreover, it can effectively reduce the manual operation amount of the whole evaluation process, improve the price efficiency, and have strong usability, so that the road condition information provided by the transportation system has reliability and brings a good experience to the user.

Example 2

The present embodiment provides an apparatus for evaluating traffic information. As shown in FIG. 6, the apparatus includes: a sample trajectory acquiring unit 61, a standard answer processing unit 62, and an evaluation unit 63.

The sample track obtaining unit 61 is configured to test the test road segment by the road test track device to obtain the sample track data of the test road segment; the standard answer processing unit 62 is configured to perform the sample track data according to the road test standard calculation manner. The processing unit obtains the standard answer road condition information; the evaluating unit 63 is configured to evaluate the accuracy of the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information according to the standard answer road condition information.

The standard answer processing unit 62 includes: a standard calculation module 621 and a standard answer acquisition module 622.

a standard calculation module 621, configured to acquire a travel speed when passing the test road section according to a length of the test road section and a travel time of the test road section, where the travel time is: a travel time and a pass in the sample track data Waiting for the difference of the traffic lights time when the test section is tested;

The standard answer obtaining module 622 is configured to search for corresponding standard answer road condition information in the road congestion rule according to the traveling speed and the identifier corresponding to the test road segment, where the road congestion rule includes different driving according to different directions. The speed corresponds to the defined road condition information of the test section.

The evaluation unit 63 includes: a comparison module 631 and an evaluation module 632.

Comparing module 631, for using the same timestamp, the traffic system according to real-time dynamic traffic The road condition information obtained by the flow information is compared with the standard answer road condition information, wherein the road segment indicated by the road condition information acquired by the traffic system corresponds to the test road segment;

The evaluation module 632 is configured to: if the acquired road condition information is the same as the standard answer road condition information, evaluate the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information as accurate; otherwise, evaluate the transportation system according to real-time dynamics. The traffic condition information obtained by the traffic flow information is inaccurate.

In this embodiment, the apparatus may further include: waiting for the traffic light time acquisition unit 64, and selecting the unit 65.

The waiting traffic light time obtaining unit 64 is configured to wait for the traffic light time when the test road segment is obtained according to the waiting traffic light time rule and the sample track data;

The selecting unit 65 is configured to select a time cut that is synchronized with the traffic system according to a time cut rule. The device provided in this embodiment can evaluate the road condition information provided by the transportation system according to the standard answer road condition information, determine the accuracy of the traffic system road condition information, and facilitate the user to adopt reliable road condition information during the driving process, and the device can be applied through The traffic control department or the operator side provides users with transportation service information to provide services for users, which is convenient for users to obtain, has high usability, and can bring good experience to users.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk, etc., includes instructions for causing a device or system to perform the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A method for evaluating traffic information, comprising:

The test road segment is tested by the road test trajectory device to obtain sample trajectory data of the test road segment;

The sample trajectory data is processed according to a road test standard calculation manner to obtain standard answer road condition information;

The accuracy of the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information is evaluated according to the standard answer road condition information.

The method according to claim 1, wherein after acquiring the sample trajectory data of the test road segment, the method further comprises: waiting for a traffic light when acquiring the test road segment according to the waiting traffic light time rule and the sample trajectory data time.

The method according to claim 2, wherein the processing the sample trajectory data according to a road test standard calculation manner to obtain a standard answer road condition information is specifically:

Obtaining a travel speed when passing the test road section according to a length of the test road section and a travel time of the test road section, wherein the travel time is: a travel time in the sample track data and waiting for a traffic light when passing the test road section The difference in time;

And searching for a corresponding standard answer road condition information in the road congestion rule according to the traveling speed and the identifier corresponding to the test road segment, where the road congestion rule includes a corresponding definition according to different driving speeds and the identifier of the test road segment. Traffic information.

The method according to claim 1, wherein after acquiring the sample trajectory data of the test road segment, the method further comprises: selecting a time cut synchronized with the traffic system according to a time cut rule.

The method according to claim 4, wherein the accuracy of the road condition information obtained by the traffic system according to the real-time dynamic traffic flow information according to the standard answer road condition information is specifically: at the same time stamp, Comparing the road condition information obtained by the traffic system according to the real-time dynamic traffic flow information with the standard answer road condition information, where the road condition information acquired by the traffic system is indicated The road segment corresponds to the test road segment;

6. A device for evaluating traffic information, comprising:

7. The device according to claim 6, wherein the device further comprises:

Waiting for the traffic light time acquisition unit, for waiting for the traffic light time when passing the test road segment according to the waiting traffic light time rule and the sample track data.

The apparatus according to claim 7, wherein the standard answer processing unit comprises: a standard calculation module, configured to acquire, when the test section is obtained, according to a length of the test section and a travel time of the test section Driving speed, wherein the driving time is: a difference between a travel time in the sample trajectory data and a waiting time for a traffic light when passing the test road segment;

a standard answer obtaining module, configured to search for a corresponding standard answer road condition information in a road congestion rule according to the traveling speed and an identifier corresponding to the test road segment, where the road congestion rule includes different driving speeds The road condition information corresponding to the identifier of the test section.

9. The device according to claim 6, wherein the device further comprises:

And a selecting unit, configured to select a time cut synchronized with the traffic system according to a time cut rule.

10. Apparatus according to claim 9 wherein said evaluation unit comprises:

a comparison module, configured to compare the road condition information acquired by the transportation system according to the real-time dynamic traffic flow information with the standard answer road condition information at the same time stamp, where the traffic system acquires The road segment indicated by the road condition information corresponds to the test road segment;

An evaluation module, configured to: if the acquired road condition information is the same as the standard answer road condition information, evaluate the road condition information obtained by the transportation system according to the real-time dynamic traffic flow information as accurate; otherwise, evaluate the transportation system according to real-time dynamic traffic. The traffic information acquired by the flow information is inaccurate.