Road safety change estimation system

Abstract

To provide a road safety change estimation system capable of appropriately estimating road-related information to be changed from among a plurality of types of road-related information of a target road.SOLUTION: In the road safety change estimation system 1, when the target road X is selected from among the plurality of registered roads Y, one or a plurality of registered roads Y having the shape information that matches the target road Y by the first predetermined value or more and having the safety information that is better than the target road Y by the second predetermined value or more are extracted from among the plurality of registered roads Y, and the road-related information of the extracted registered roads Y and the road-related information of the target road X are output. The road-related information includes one or more pieces of traffic rule information to be applied to a traveling vehicle on each of the registered roads Y. The safety information includes traffic rule violation information or traffic accident information that has occurred on each of the plurality of registered roads Y.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a road safety change estimation system that can appropriately estimate road-related information that should be changed from among multiple types of road-related information of a target road. [Background technology]

[0002] Conventionally, in order to select a highly convenient facility or a candidate facility installation location, a technique has been known in which traffic road environment information around the candidate facility installation location is extracted based on driving information including vehicle speed, position, and time information (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-142141 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, there is a demand to change road-related information (traffic rules, road width, etc.) for roads where there are many traffic violations and traffic accidents in order to reduce traffic violations and traffic accidents.

[0005] However, since one road contains various road-related information, it is difficult to appropriately determine which road-related information should be changed and how.

[0006] In addition, we must avoid situations where, as much as possible, we find that "changes to road-related information did not reduce traffic violations or traffic accidents (in fact, they increased)."

[0007] Therefore, an object of the present invention is to provide a system for estimating changes in road safety that can appropriately estimate road-related information that should be changed from among multiple types of road-related information of a target road. [Means for solving the problem]

[0008] The present invention provides a road safety change estimation system comprising: a memory unit that stores shape information regarding the shape of each of a plurality of registered roads, including connection information regarding the connection of each of the plurality of registered roads to other roads; multiple types of road-related information, including one or more traffic rule information applicable to vehicles traveling on each of the plurality of registered roads; and safety information regarding traffic rule violation information or traffic accident information that has occurred on each of the plurality of registered roads; a selection unit that allows a user to select a target road from the plurality of registered roads; an extraction unit that extracts one or more registered roads from the plurality of registered roads that have shape information that matches that of the target road by a first predetermined value or more and have safety information that is better than that of the target road by a second predetermined value or more; and an output unit that outputs the road-related information of the extracted registered roads and the road-related information of the target road.

[0009] According to this configuration, road-related information of registered roads that are similar in shape to the target road and that are close to the target safety level (traffic rule violation information, traffic accident information, etc.) of the target road are output, and therefore, by examining the differences in the output road-related information, the user can estimate how the road-related information of the target road should be changed in order to achieve the goal.

[0010] In another aspect of the present invention, there are provided a road safety change estimation program and a road safety change estimation method corresponding to the above road safety change estimation system. [Effects of the Invention]

[0011] According to the safety change estimation system of the present invention, it is possible to appropriately estimate the road-related information that should be changed from among a plurality of types of road-related information of a target road. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is an explanatory diagram of a registered road similar to a target road according to an embodiment of the present invention; [Figure 2] 1 is a block diagram of a safety change estimation system according to an embodiment of the present invention; [Figure 3] FIG. 1 is an explanatory diagram of a registered road according to an embodiment of the present invention; [Figure 4] FIG. 1 is an explanatory diagram of rule application positions according to an embodiment of the present invention; [Figure 5] FIG. 1 is an explanatory diagram of extraction of registered roads according to an embodiment of the present invention; [Figure 6] FIG. 10 is an explanatory diagram of road-related information output according to an embodiment of the present invention; [Figure 7] 1 is a flowchart of road-related information output according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0013] A safety change estimation system 1 according to an embodiment of the present invention will be described below with reference to FIGS.

[0014] The safety change estimation system 1 is for appropriately estimating road-related information that should be changed from multiple types of road-related information for a target road X (see Figure 1(a)), and as shown in Figure 2, it includes a memory unit 2, an acquisition unit 3, a judgment unit 4, a selection unit 5, an extraction unit 6, an output unit 7, and an estimation unit 8.

[0015] The storage unit 2 stores shape information, road-related information, and safety information.

[0016] The shape information relates to the shape of each of the plurality of registered roads Y (see FIG. 3), and the shape information includes connection information relating to the connection of each of the plurality of registered roads Y to other roads Y0.

[0017] The shape information may include the length, width, curvature, type, etc. of each registered road Y.

[0018] Possible types of registered road Y include national expressways, urban expressways, general national roads, major local roads, major local roads (designated city roads), general prefectural roads, major general roads, general roads, and minor roads.

[0019] As shown in FIG. 3, the connection information may include the number of other registered roads Y0 connected to each registered road Y, the connection positions, and the like.

[0020] It is preferable to store as many roads as possible as registered roads Y, and for example, it is conceivable to store all roads throughout Japan. In this embodiment, as shown in Fig. 3, each link is treated as a registered road Y. However, for example, a plurality of consecutive links in a straight line or a curved line may be collectively treated as a registered road Y.

[0021] The road-related information includes one or more pieces of traffic rule information that are applied to vehicles traveling on each of the multiple registered roads Y.

[0022] In this embodiment, the storage unit 2 is assumed to contain multiple types of road-related information. Multiple types of traffic rule information such as "speed limit" and "presence or absence of stop signs" may be the multiple types of road-related information, or "traffic rule information" and "road type" may be the multiple types of road-related information. In the following, an example will be described in which multiple types of traffic rule information are multiple types of road-related information.

[0023] The traffic rule information may be rules indicated by road signs (regulatory signs, directional signs, supplementary signs), road markings (regulatory indications, directional indications), etc., and the latitude and longitude of the rule application locations where these rules are applied may be those listed in decision-making data issued by the Public Safety Commission, police stations, etc. If the decision-making data is listed as an address, it is preferable to store information in the storage unit 2 in which the range included in the address has been converted into latitude and longitude in advance.

[0024] These rule application locations can be handled as data and do not need to be displayed like a map, but for ease of understanding, if the latitude and longitude of these rule application locations were displayed, it would look like Figure 4. Figure 4 shows that the latitude and longitude of multiple rule application locations where a specified speed limit applies form point set range A, the latitude and longitude of multiple rule application locations where a stop sign applies form point set range B, and the latitude and longitude of multiple rule application locations where a no parking rule applies form point set range C.

[0025] The safety information relates to traffic rule violation information or traffic accident information that has occurred on each of the multiple registered roads Y. The safety information may further include traffic volume information on each registered road Y, driving information of vehicles that have traveled on each registered road Y, etc.

[0026] The traffic rule violation information may include the number of traffic rule violations by type, the number of all traffic rule violations, and so on.

[0027] Traffic accident information may include the number of traffic accidents by type (seriousness, etc.), the total number of traffic accidents, and so on.

[0028] The traffic volume information may include the number of vehicles traveling by vehicle category (four-wheeled, two-wheeled, large, small, standard), the number of vehicles traveling in all vehicle categories, and so on.

[0029] Possible driving information for a traveling vehicle includes average speed and average driving tendency for each vehicle category (four-wheeled, two-wheeled, large, small, standard), average speed and average driving tendency for all vehicle categories, etc. Possible driving tendency includes sudden acceleration, sudden braking, meandering, etc.

[0030] The traffic rule violation information, traffic accident information, traffic volume information, and traveling vehicle information may be stored automatically or manually in the storage unit 2. For example, a configuration is conceivable in which traffic accident information is stored manually, and traffic rule violation information, traffic volume information, and traveling information acquired by the acquisition unit 3 and determination unit 4, which will be described later, are automatically stored.

[0031] In this embodiment, the storage unit 2 also stores road position information relating to each position of a plurality of registered roads Y, for use in determination by the determination unit 4, which will be described later.

[0032] The road position information may be the latitude and longitude of each registered road Y, and it is preferable that the storage unit 2 stores the latitude and longitude of the range in which each registered road Y is included.

[0033] The acquisition unit 3 acquires travel information of the registered vehicle Z on the registered road Y.

[0034] In this embodiment, registered vehicle Z (see Figure 3) is equipped with a GPS device (not shown) that can detect its own position, and a transmitter (not shown) of registered vehicle Z is configured to be able to associate location information regarding its own position detected by the GPS device with time information that is the detection time and transmit it to safety change estimation system 1.

[0035] The acquisition unit 3 acquires the location information and time information transmitted from the registered vehicle Z as travel information. It is preferable to acquire the travel information sequentially over a short interval. In this embodiment, the safety change estimation system 1 is installed in a communication center or the like, and communication with the registered vehicle Z is performed wirelessly.

[0036] In this way, the travel information (speed, etc.) acquired from a large number of registered vehicles Z is stored in the storage unit 2.

[0037] Furthermore, since the traffic volume on each registered road Y can be calculated based on the travel information acquired from a large number of registered vehicles Z, the calculated traffic volume is stored in the storage unit 2 as traffic volume information.

[0038] The determination unit 4 determines whether the registered vehicle Z violates each traffic rule on the registered road Y based on the travel information.

[0039] In detail, based on the road position information stored in the memory unit 2 and the position information included in the driving information, the registered road Y on which the registered vehicle Z traveled is determined, the traffic rules applicable to the determined registered road Y are extracted from the memory unit 2, and whether or not the registered vehicle Z has violated the rules is determined based on the extracted traffic rules and the acquired driving information.

[0040] As a method of determining whether or not there is a violation, for example, in the case of a speeding violation, a violation is determined if the vehicle is traveling at a speed exceeding the specified speed limit by more than a specified amount in a speed limit zone (point set range A in the case of Figure 4), and in the case of a stop sign violation, a violation is determined if the vehicle does not stop for a specified period of time within a few meters before or after the stop position (point set range B in the case of Figure 4).The speed of registered vehicle Z can be calculated by dividing the distance between the two target position information points by the time between them.

[0041] In this way, the traffic rule violations determined for a large number of registered vehicles Z on each registered road Y are stored in the storage unit 2 as traffic rule violation information.

[0042] The selection unit 5 allows the user to select a target road X from among a plurality of registered roads Y.

[0043] For example, as shown in Fig. 3, a configuration is conceivable in which a target road X is selected from a plurality of registered roads Y displayed on a map. Naturally, it is also possible to select a registered road Y other than those shown in Fig. 3 as the target road X by zooming in, zooming out, scrolling, etc.

[0044] The extraction unit 6 extracts one or more registered roads Y from among a plurality of registered roads Y that have shape information that matches that of the target road X by a first predetermined value or more and have safety information that is better than that of the target road X by a second predetermined value or more.

[0045] To extract registered roads Y having shape information that matches the selected target road X by a first predetermined value or more, it is possible to use AI, for example, to extract registered roads Y that are similar to the target road X in terms of length, width, curvature, type, number of other registered roads Y0 connected to them, and connecting positions, etc. The first predetermined value can be set depending on the degree to which similar registered roads Y are desired to be extracted.

[0046] In this case, even if the direction of the registered road Y is different from that of the target road X on the map, if the registered road Y matches the target road X by a first predetermined value or more by rotating or inverting the road, the registered road Y is included in the target to be extracted.

[0047] The second predetermined value may also be set depending on the desired level of safety.

[0048] For example, Figure 5 shows an example in which, when the second predetermined value is set to "2.0%", among multiple registered roads Y, registered roads Y1-Y4 having shape information that matches that of the target road X by more than the first predetermined value are extracted, and registered roads Y1 and Y4 having traffic rule violation rates (safety information) of "2.5%" and "2.0%" that are better than the traffic rule violation rate (safety information) of the target road X by more than the second predetermined value of "2.0%".

[0049] In this way, for example, as shown in Figure 1, a registered road Y (Figure 1(b)) similar to a target road X (Figure 1(a)) is extracted. Figure 1 shows an example in which a registered road Y is extracted that has similar road-related information overall, although some road-related information (the length of the registered road Y and the width of another road Y0d connected to it) is slightly different from that of the target road X.

[0050] The output unit 7 outputs the road-related information of the extracted registered road Y and the road-related information of the target road X.

[0051] For example, FIG. 6(a) shows an example of outputting road-related information for registered road Y1 extracted in FIG. 5 and road-related information for target road X, and FIG. 6(b) shows an example of outputting road-related information for registered road Y4 extracted in FIG. 5 and road-related information for target road X. By referring to the output road-related information (traffic rule information) for registered road Y and road-related information (traffic rule information) for target road X, a user can infer that "changing the traffic rules of target road X to traffic rules similar to those of extracted registered road Y can be expected to provide safety comparable to that of extracted registered road Y." In FIG. 6(a), a user can infer that "imposing a 'stop sign' and a 'no parking' on target road X can be expected to provide safety comparable to that of registered road Y1," and in FIG. 6(b), a user can infer that "changing the 'speed limit' of target road X to 40 km can be expected to provide safety comparable to that of registered road Y4."

[0052] However, it is thought that each road usually contains more types of road-related information (traffic rule information, etc.) than that shown in Figure 6, and it may be difficult to recognize which road-related information (traffic rule information, etc.) should be changed.

[0053] Therefore, in this embodiment, when outputting the road-related information of the extracted registered road Y and the road-related information of the target road X, the output unit 7 outputs road-related information of a type for which there is a difference between the extracted registered road Y and the target road X that is equal to or greater than the distinction criterion set for each type of road-related information, distinguishing it from other types of road-related information.

[0054] Figure 6(a) shows an example in which road-related information for "stop sign" on registered road Y1 is output separately from other types of road-related information when the distinction criterion for "speed limit" is set to "20 km or more lower," and Figure 6(b) shows an example in which road-related information for "speed limit" on registered road Y4 is output separately from other types of road-related information when the distinction criterion for "stop sign" is set to "presence or absence of a stop sign rule."

[0055] As a method of distinction, for example, road-related information of a type in which a difference equals or exceeds a distinction criterion may be output in a different color or thickness from other road-related information, or the color or thickness may be changed depending on the magnitude of the difference to further distinguish the information from other road-related information.

[0056] The estimation unit 8 estimates the change in safety of the target road X when one of the multiple types of road-related information of the target road X is made closer to the corresponding type of road-related information of the extracted registered road Y, taking into account the safety weights set for each type of road-related information.

[0057] For example, since stop sign violations are generally more dangerous than parking violations, it is conceivable that the change in safety when traffic rule information is changed from "no stop sign" to "stop sign" will be estimated to be higher than the change in safety when traffic rule information is changed from "no parking violation" to "parking violation."

[0058] Next, the flow of control in the safety change estimation system 1 of this embodiment will be described with reference to the flowchart of FIG.

[0059] First, when a user selects a target road X from a plurality of registered roads Y in the selection unit 5 (S1), one or more registered roads Y are extracted from the plurality of registered roads Y that have shape information that matches that of the target road X by a first predetermined value or more and have safety information that is better than that of the target road X by a second predetermined value or more (S2).

[0060] Finally, the road-related information of the extracted registered road Y and the road-related information of the target road X are output (S3).

[0061] As described above, the safety change estimation system 1 according to this embodiment extracts one or more registered roads Y from among a plurality of registered roads Y that have shape information that matches that of the target road X by a first predetermined value or more and that have safety information that is better than that of the target road X by a second predetermined value or more, and outputs road-related information for the extracted registered road Y and road-related information for the target road X.

[0062] According to this configuration, road-related information of the target road X and road-related information of registered road Y, which is similar in shape to the target road X and close to the safety level (traffic rule violation information, traffic accident information, etc.) that the target road X aims for, are output. Therefore, by examining the differences between the output road-related information, the user can estimate how the road-related information of the target road X should be changed in order to achieve the goal.

[0063] Furthermore, in the safety change estimation system 1 according to this embodiment, road-related information of a type where there is a difference between the extracted registered road Y and the target road X that is equal to or greater than the distinction criterion set for each type of road-related information is output, distinguishing it from other types of road-related information.

[0064] With this configuration, even if the extracted registered road Y and target road X contain multiple types of road-related information, it is possible to easily understand which traffic rules should be changed.

[0065] Furthermore, in the safety change estimation system 1 according to this embodiment, the change in safety of the target road X when any of the multiple types of road-related information of the target road X is made closer to the corresponding type of road-related information of the extracted registered road Y is estimated taking into consideration the safety weights set for each of the multiple types of road-related information.

[0066] According to this configuration, it is possible to estimate an efficient change in road-related information in order to improve the safety of the target road X.

[0067] The safety change estimation system of the present invention is not limited to the above-described embodiment, and various modifications and improvements are possible within the scope of the claims.

[0068] For example, in the above embodiment, traffic rule information has been used as an example of road-related information. However, the road-related information may further include the length, width, type, and number of lanes of each registered road Y, the cycle of traffic lights installed on each registered road Y, the gradient of each registered road Y, information on buildings in the vicinity of each registered road Y, and connection information of other roads Y0 connected to each registered road Y. In other words, information similar to shape information may be used as road-related information. For example, if the "number of lanes" in the road-related information output from the output unit 7 is significantly different between the registered road Y and the target road X, the user can estimate that "if the "number of diagonal lines" is set to the same number as the registered road Y, safety at the same level as the registered road Y can be expected."

[0069] The building information may include the height, width, depth, shape, color, distance from each registered road Y, and the like of buildings, tunnels, bridges, and other structures located near each registered road Y.

[0070] In addition, in the above embodiment, the length, width, curvature, type, etc. of each registered road Y are given as examples of shape information, but the shape information may also include the number of lanes of each registered road Y, the cycle of traffic lights installed on each registered road Y, the slope of each registered road Y, information on buildings in the vicinity of each registered road Y, etc.

[0071] In addition, in the above embodiment, the connection information is exemplified by the number of other registered roads Y0 connected to each registered road Y and the connection positions, etc., but the connection information may further include the length, width, type, and number of lanes of the other registered roads Y0, the cycle of traffic lights installed on the other registered roads Y0, the gradient of the other registered roads Y0, and information on buildings in the vicinity of the other registered roads Y0, etc.

[0072] Furthermore, it is considered that safety information differs depending on the time of day and weather. Therefore, it is also possible to configure the extraction unit 6 to extract one or more registered roads Y having safety information that is better than the target road X by a second predetermined value or more "by time of day or by weather," and the output unit 7 to output the road-related information of the extracted registered road Y and the road-related information of the target road X by time of day or by weather.

[0073] This makes it possible to effectively estimate road-related information that should be changed, for example, by focusing on time periods or weather conditions when the rate of traffic rule violations is high (or low).

[0074] Furthermore, road safety also varies depending on the severity of accidents and traffic violations that have occurred. Therefore, the extraction unit 6 may be configured to extract one or more registered roads Y that are better than the target road X by at least a second predetermined value "with respect to one or more predetermined types of safety information," and the output unit 7 may output road-related information for the extracted registered road Y and road-related information for the target road X. Examples of predetermined types of safety information include "stop sign violations," "speeding exceeding 30 km or more," and "fatal accidents."

[0075] This makes it possible to effectively estimate road-related information that should be changed, focusing on the severity of the accident or traffic rule violation that has occurred.

[0076] Furthermore, in the above embodiment, the safety change estimation system 1 is equipped with the acquisition unit 3 and the judgment unit 4, but it may be configured not to have these and to store traffic rule violation information, traffic accident information, traffic volume information, or traveling information of traveling vehicles that are acquired separately by other methods in the memory unit 2.

[0077] In addition, in the above embodiment, decision-making data issued by the Public Safety Commission, police stations, etc. is used as the "latitude and longitude of the rule application location where a specified traffic rule is applied" of the present invention, but data obtained from other sources may also be used.

[0078] Furthermore, in the above embodiment, the position information detected by the GPS device is acquired, but the position information may be acquired from an image or the like, for example.

[0079] The present invention can also be applied to a program corresponding to the processing performed by the safety change estimation system, or to a recording medium storing the program. In the case of a recording medium, the program is installed in a computer or the like. Here, the recording medium storing the program may be a non-transitory recording medium. Examples of non-transitory recording media include, but are not limited to, CD-ROMs.

[0080] A computer consists of a CPU, memory, and hard disk, and the program is recorded on the hard disk, expanded into memory when executed, and processed by the CPU. The computer's CPU may be capable of parallel processing, or the computer itself may be capable of distributed processing. The results of processing can be displayed on any display via a network. [Explanation of symbols]

[0081] 1 Safety change estimation system 2 Storage section 3 Acquisition part 4 Judgment section 5 Selection section 6 Extraction part 7 Output section 8 Estimation part A Point set range B Point set range C Point set range X Target road Y registered road Z registered vehicle

Claims

1. a storage unit that stores shape information relating to the shape of each of the plurality of registered roads, including connection information relating to connections of each of the plurality of registered roads to other roads; multiple types of road-related information, including information on one or more traffic rules that apply to vehicles traveling on each of the plurality of registered roads; and safety information relating to traffic rule violation information or traffic accident information that has occurred on each of the plurality of registered roads; a selection unit that allows a user to select a target road from among the plurality of registered roads; an extraction unit that extracts, from the plurality of registered roads, one or more registered roads that have the shape information that matches that of the target road by a first predetermined value or more and that have the safety information that is better than that of the target road by a second predetermined value or more; an output unit that outputs road-related information of the extracted registered road and road-related information of the target road; A road safety change estimation system comprising:

2. The road safety change estimation system described in claim 1, characterized in that when outputting the road-related information of the extracted registered road and the road-related information of the target road, the output unit outputs road-related information of a type for which there is a difference between the extracted registered road and the target road that is equal to or greater than a distinction criterion set for each type of road-related information, distinguishing it from other types of road-related information.

3. The road safety change estimation system described in claim 1, further comprising an estimation unit that estimates the change in safety of the target road when any of multiple types of road-related information of the target road is brought closer to the corresponding type of road-related information of the extracted registered road, taking into account safety weights set for each type of road-related information.

4. The road safety change estimation system described in claim 1, characterized in that the extraction unit extracts one or more registered roads that have safety information that is better than the target road by a second predetermined value or more, by time period or by weather.

5. The road safety change estimation system described in claim 1, characterized in that the extraction unit extracts one or more registered roads that are better than the target road by a second predetermined value or more in terms of one or more predetermined types of safety information.

6. A program executed on a computer having a storage unit that stores shape information relating to the shape of each of a plurality of registered roads, including connection information relating to connections of other roads to each of the plurality of registered roads, multiple types of road-related information including information on one or more traffic rules that apply to vehicles traveling on each of the plurality of registered roads, and safety information relating to traffic rule violation information or traffic accident information that has occurred on each of the plurality of registered roads, and a selection unit that allows a user to select a target road from the plurality of registered roads, extracting one or more registered roads from the plurality of registered roads, the registered roads having shape information that matches that of the target road by a first predetermined value or more and having safety information that is better than that of the target road by a second predetermined value or more; outputting road-related information of the extracted registered roads and road-related information of the target road; A road safety change estimation program for causing the computer to execute the above.

7. A method executed by a computer having a storage unit that stores shape information relating to the shape of each of a plurality of registered roads, including connection information relating to connections of other roads to each of the plurality of registered roads, multiple types of road-related information including information on one or more traffic rules that apply to vehicles traveling on each of the plurality of registered roads, and safety information relating to traffic rule violation information or traffic accident information that has occurred on each of the plurality of registered roads, and a selection unit that allows a user to select a target road from the plurality of registered roads, extracting one or more registered roads from the plurality of registered roads, the registered roads having shape information that matches that of the target road by a first predetermined value or more and having safety information that is better than that of the target road by a second predetermined value or more; outputting road-related information of the extracted registered roads and road-related information of the target road; A method for estimating changes in road safety, comprising:

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