Support information provision device

Abstract

To provide a vehicle driving support device by appropriately setting a near-miss level.SOLUTION: A support information provision device 1 provides a near-miss level indicating easiness to cause a near-miss event to a driving support device 100 of a vehicle V. The support information provision device 1 includes: a level setting section 11 for setting a near-miss level for each one of a plurality of division areas in a region; and a re-setting determination section 12 for determining necessity of re-setting the set near-miss level. The re-setting determination section 12 sets a determination area constituted by the high-level division areas with the highest near-miss level. The re-setting determination section 12 determines that the re-setting is necessary when an occupation ratio of the number of unstable behaviors in the determination area is less than a number threshold with respect to the total amount of the number of the unstable behaviors in the region. When it is determined that the re-setting is necessary, the level setting section 11 re-sets the near-miss level on the division areas excluding the high-level division areas.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an assistance information providing device that provides a near-miss level to a driving assistance device of a vehicle. [Background technology]

[0002] Estimation of the likelihood of near-miss events occurring during vehicle travel has been carried out. For example, Patent Document 1 describes a device that estimates the risk of near-miss events, such as a driver running out into the street at an intersection. The near-miss level, which indicates the likelihood of such near-miss events occurring, is used, for example, for vehicle driving assistance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-89698 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, when setting (estimating) near-miss levels indicating the likelihood of near-miss events, a target region is divided into multiple divided areas, and a near-miss level is set for each divided area within the region. In this case, for example, a high near-miss level is set for divided areas with a high number of near-miss events within the region, and a low near-miss level is set for divided areas with a low number of near-miss events. For example, a certain divided area may have a significantly higher number of near-miss events than other divided areas. In this case, the near-miss levels for the other divided areas may be set very low compared to the divided area with a significantly higher number of near-miss events, making the other divided areas appear to have a very low number of near-miss events. As a result, even if a divided area with a relatively high number of near-miss events is included among the other divided areas, a low near-miss level may be set for such divided area, which may result in an inappropriate near-miss level being set.

[0005] Therefore, the present disclosure describes an assistance information providing device that can more appropriately set a near-miss level and provide it to a driving assistance device of a vehicle. [Means for solving the problem]

[0006] One aspect of the present disclosure is an assistance information providing device that provides a near miss level indicating the likelihood of a near miss event occurring in a vehicle to a driving assistance device of a vehicle, the device comprising: a level setting unit that sets a near miss level for each of divided areas obtained by dividing a region into a plurality of areas based on unstable behavior information including location information where the vehicle exhibited unstable behavior different from that during normal driving; a resetting determination unit that determines whether the set near miss level needs to be reset; and a providing unit that provides the set near miss level to the driving assistance device, wherein the level setting unit calculates the number of unstable behaviors, which is the number of times the vehicle exhibited unstable behavior, for each of the plurality of divided areas based on the unstable behavior information, and sets the near miss level for each of the plurality of divided areas based on the relative relationship between the numbers of unstable behaviors for the plurality of divided areas within the region so that the higher the number of unstable behaviors in the region, the higher the near miss level. The resetting judgment unit sets a group of areas consisting of high-level divided areas, which are divided areas with the highest near-miss level within the region, as a judgment area, calculates the number of unstable behaviors within the judgment area based on the unstable behavior information, calculates the total number of unstable behaviors within the region, and judges that resetting is necessary if the proportion of the number of unstable behaviors within the judgment area to the total number of unstable behaviors within the region is less than a number threshold, and if the resetting judgment unit judges that resetting is necessary, the level setting unit resets the near-miss levels for the divided areas within the region excluding the high-level divided areas, and resets the near-miss levels so that the divided areas with a higher number of unstable behaviors have a higher near-miss level based on the relative proportion of the number of unstable behaviors in the multiple divided areas within the region excluding the high-level divided areas.

[0007] In the support information providing device, the resetting determination unit may divide the region into a determination area and a plurality of sub-areas of a size corresponding to the determination area, calculate the number of unstable behaviors for each of the plurality of sub-areas based on the unstable behavior information, and determine that resetting is necessary when the proportion of the number of unstable behaviors in the determination area to the total number of unstable behaviors in the region is less than a number threshold and the maximum value of the number of unstable behaviors calculated for each of the plurality of sub-areas is equal to or greater than the maximum number threshold.

[0008] In the support information providing device, the resetting determination unit may determine that resetting is necessary when the proportion of the number of unstable behavior cases in the determination area to the total number of unstable behavior cases in the region is less than a number threshold, the maximum value of the number of unstable behavior cases calculated for each of the multiple sub-areas is equal to or greater than a maximum number threshold, and the deviation between the maximum value of the number of unstable behavior cases calculated for each of the multiple sub-areas and the number of unstable behavior cases in the determination area is equal to or greater than a deviation threshold. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, a near-miss level can be set more appropriately and provided to a driving assistance device of a vehicle. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram illustrating an example of a support information providing device according to an embodiment. [Figure 2] FIG. 2 is a schematic diagram for explaining how to set a near-miss level for each divided area within a region. [Figure 3] 3(a) and 3(b) are schematic diagrams for explaining how a determination area and sub-areas are set within a region. [Figure 4] FIG. 4 is a flowchart showing the flow of the near-incident level providing process performed by the support information providing device. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, exemplary embodiments will be described with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted.

[0012] The support information providing device 1 shown in FIG. 1 sets a near miss level indicating the likelihood of a near miss event occurring in the vehicle V for each divided area. The support information providing device 1 provides the set near miss level to the driving support device 100 of the vehicle V. A near miss event means, for example, a situation that is not anticipated by the driver of the vehicle V. A near miss event means, for example, a situation that is not anticipated in advance in the driving scene of the vehicle V. The near miss level is set high when a near miss event is likely to occur, and is set low when a near miss event is unlikely to occur.

[0013] In this embodiment, the support information providing device 1 is configured by a server device, as an example. The support information providing device 1 provides (transmits) the near-miss level to the driving support device 100 of the vehicle V via wireless communication or the like. However, the support information providing device 1 is not limited to being configured by a server device. The support information providing device 1 may also be mounted on the vehicle V.

[0014] The driving assistance device 100 of the vehicle V provides driving assistance for the vehicle V based on the provided near-miss level. For example, when the vehicle V is traveling in a divided area with a high near-miss level, the driving assistance device 100 can accelerate the start timing of driving assistance control or strengthen the degree of driving assistance control compared to when the near-miss level is low. There are no particular limitations on the type of driving assistance provided by the driving assistance device 100.

[0015] The support information providing device 1 is an electronic control unit having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), communication devices, etc. The support information providing device 1, for example, loads a program recorded in the ROM into the RAM and executes the program loaded into the RAM with the CPU, thereby realizing various functions. The support information providing device 1 may be composed of multiple electronic control units. Functionally, the support information providing device 1 includes a level setting unit 11, a resetting determination unit 12, and a providing unit 13.

[0016] The level setting unit 11 acquires unstable behavior information. The level setting unit 11 may acquire the unstable behavior information directly from each of the multiple vehicles V. The level setting unit 11 may acquire the unstable behavior information from a collection device that collects unstable behavior information from the multiple vehicles V.

[0017] The unstable behavior information includes location information of the vehicle V exhibiting unstable behavior different from that during normal driving. The unstable behavior different from that during normal driving may include, for example, the vehicle V colliding with a surrounding object, sudden deceleration, sudden large steering, activation of an airbag system installed in the vehicle V, activation of a collision prevention device installed in the vehicle V, etc.

[0018] The unstable behavior information may include, for example, identification information of the vehicle V, location information of the vehicle V (e.g., latitude and longitude information), time information, the operation status of the collision prevention device (alarm by the collision prevention device, deceleration by the collision prevention device), the operation status of the airbag system, the acceleration / deceleration of the vehicle V, the vehicle speed, the operation status of various applications related to the driving of the vehicle V, etc. Based on the unstable behavior information including this information, the level setting unit 11 may recognize the presence or absence of unstable behavior and the location where the unstable behavior occurred.

[0019] Here, the support information providing device 1 has set therein "regions" obtained by dividing the map information into a plurality of parts, and "divided areas" obtained by further dividing the divided regions into a plurality of parts. In other words, a region is made up of a plurality of divided areas. Furthermore, the map information is made up of a plurality of regions. As an example, a region may be an area of ​​10 km square. As an example, a divided area may be an area of ​​250 m square.

[0020] The level setting unit 11 sets a near-accident level for each of the multiple divided areas based on the unstable behavior information. More specifically, the level setting unit 11 calculates the number of unstable behaviors, which is the number of times the vehicle V exhibited unstable behavior, for each of the multiple divided areas in each region based on the unstable behavior information. The level setting unit 11 can calculate the number of unstable behaviors for each divided area based on the location information, included in the unstable behavior information, where the vehicle V exhibited unstable behavior. The number of unstable behaviors may be the number of times the vehicle V exhibited unstable behavior within a predetermined period. The level setting unit 11 sets a near-accident level for each divided area based on the number of unstable behaviors calculated for each divided area.

[0021] Furthermore, when setting the near-accident level, the level setting unit 11 sets a near-accident level for each divided area within a plurality of regions individually for each of the plurality of regions. The level setting unit 11 sets a near-accident level for each of the plurality of divided areas within the region based on the relative relationship between the numbers of unstable behaviors in the plurality of divided areas within the region to be set, such that the more unstable behaviors there are in the region to be set, the higher the near-accident level will be for the divided area.

[0022] For example, assume that the near-miss level is set to one of low, medium, and high levels. The low, medium, and high levels indicate the likelihood of a near-miss event occurring in this order. For example, when setting near-miss levels for each divided area in a first region, the level setting unit 11 sets a high level for the divided area in the first region where the number of unstable behaviors is relatively high, sets a low level for the divided area in the first region where the number of unstable behaviors is relatively low, and sets a medium level for the other divided areas in the first region. When setting near-miss levels for each divided area in a second region different from the first region, the level setting unit 11 sets a high level for the divided area in the second region where the number of unstable behaviors is relatively high, sets a low level for the divided area in the second region where the number of unstable behaviors is relatively low, and sets a medium level for the other divided areas in the second region. In other words, the near-miss level setting for the first region and the near-miss level setting for the second region are not related to each other. In this way, the level setting unit 11 sets near-miss levels for the divided areas in each of the multiple regions.

[0023] The level setting unit 11 may set the near-miss level using at least the number of unstable behaviors. The level setting unit 11 may set the near-miss level taking into consideration information other than the number of unstable behaviors. The level setting unit 11 may set the near-miss level using, for example, an AI (Artificial Intelligence) estimation model. For example, a kernel density estimation algorithm may be used to set the near-miss level.

[0024] Furthermore, the level setting unit 11 resets the near-accident level when the reset determination unit 12 determines that resetting of the near-accident level is necessary. The resetting of the near-accident level will be described later.

[0025] The reset determination unit 12 determines whether or not the near-accident level set by the level setting unit 11 needs to be reset. Here, the reason for resetting the near-accident level will be explained. For example, as shown in FIG. 2, it is assumed that the level setting unit 11 has set near-accident levels for each of the multiple divided areas of region A. For example, the number of unstable behaviors in divided area A1 within region A is exceptionally high, and the level setting unit 11 sets a high near-accident level for divided area A1. For example, the number of unstable behaviors in divided area A2 within region A is also relatively high, but the number appears to be very low compared to divided area A1. In this case, the level setting unit 11 may set a low near-accident level for divided area A2. In reality, if the number of unstable behaviors in divided area A1 is not exceptionally high, it is considered appropriate to set a high near-accident level for divided area A2 because the number of unstable behaviors in divided area A2 is also relatively high. For this reason, the reset determination unit 12 determines whether there are other divided areas in which it is desirable to set a high near-miss level because there are divided areas with an exceptionally high number of unstable behaviors. If there are other divided areas in which it is desirable to set a high near-miss level, the reset determination unit 12 determines that it is necessary to reset the near-miss level.

[0026] Specifically, the resetting determination unit 12 sets a group of areas constituted by high-level divided areas within the region to be determined as the determination area. The high-level divided area is the divided area with the highest near-miss level within the region to be determined. For example, a high-level divided area may be set alone within the region, or multiple high-level divided areas may be set adjacent to each other to form a group. A high-level divided area set alone within the region refers to a state in which no other high-level divided areas are adjacent to the high-level divided area. A state in which multiple high-level divided areas are adjacent to each other to form a group refers to a state in which four 250-meter square divided areas are adjacent to each other to form a 500-meter square area as a whole. In this way, the determination area may be formed by a single high-level divided area or a group of multiple high-level divided areas.

[0027] For example, as shown in FIG. 3(a), assume that region B is divided into a mesh-like pattern and divided into a plurality of divided areas B10. Of the plurality of divided areas B10 that make up region B, assume that divided areas B11, B12, B13, and B14 have high near-miss levels, and that divided areas B11 to B14 are high-level divided areas. Assume that divided areas B11 to B14 are adjacent to each other to form a square area. In this case, resetting determination unit 12 sets the block of area formed by divided areas (high-level divided areas) B11 to B14 as determination area C.

[0028] The resetting determination unit 12 divides the region to be determined into a determination area and a plurality of sub-areas each having a size corresponding to the determination area. Here, "a size corresponding to the determination area" includes being the same size as the determination area, and, if it is not possible to make the sub-areas exactly the same size, being approximately the same size as or close to the determination area. For example, as shown in FIG. 3(a), assume that a determination area C is set within region B. This determination area C is made up of four divided areas 10 (divided areas B11 to B14). In this case, as shown in FIG. 3(b), the resetting determination unit 12 uses sub-area D, which is four times the size of divided area B10 (a rectangle having the size of four). Then, the resetting determination unit 12 divides the areas within region B other than the determination area C by the sub-areas D. In this way, the resetting determination unit 12 divides region B into a determination area C and a plurality of sub-areas D. Note that if the determination area is made up of one divided area, the size of each sub-area is the size of one divided area.

[0029] The resetting determination unit 12 calculates the number of unstable behaviors in the determination area based on the unstable behavior information. The resetting determination unit 12 calculates the number of unstable behaviors in each of a plurality of sub-areas based on the unstable behavior information. The resetting determination unit 12 calculates the total number of unstable behaviors in the region based on the unstable behavior information. Note that the resetting determination unit 12 can calculate the number of unstable behaviors in each division area using the same method as the calculation of the number of unstable behaviors using the unstable behavior information performed by the level setting unit 11. When making this calculation, the resetting determination unit 12 may use the number of unstable behaviors in each division area calculated by the level setting unit 11.

[0030] The reset determination unit 12 determines whether or not it is necessary to reset the near-miss level based on the calculated number of unstable behaviors. The reset determination unit 12 determines that it is necessary to reset the near-miss level when all of the following conditions 1 to 3 are met. (Condition 1): The ratio of the number of unstable behaviors within the judgment area to the total number of unstable behaviors within the region is less than the number threshold. (Condition 2): The maximum value of the number of unstable behaviors calculated for each of the plurality of sub-areas is equal to or greater than the maximum number threshold. (Condition 3): The difference between the maximum value of the number of unstable behaviors calculated for each of the plurality of sub-areas and the number of unstable behaviors in the determination area is equal to or greater than a difference threshold. The "threshold value for the number of items," "maximum threshold value for the number of items," and "deviation threshold value" in conditions 1 to 3 are each set in advance.

[0031] If the reset determination unit 12 determines that resetting is necessary, the level setting unit 11 resets the near-event levels. In this case, the reset determination unit 12 resets the near-event levels for the divided areas excluding the high-level divided areas among the multiple divided areas in the region to be reset. Here, the reset determination unit 12 resets the near-event levels based on the relative proportions of the numbers of unstable behaviors in the multiple divided areas excluding the high-level divided areas in the region, so that the near-event levels are higher for divided areas with a higher number of unstable behaviors. In other words, the reset determination unit 12 resets the near-event levels for the other divided areas without using the number of unstable behaviors in the high-level divided areas. In this way, the reset determination unit 12 can reset the near-event levels for the other divided areas, eliminating the influence of an exceptionally high number of unstable behaviors in the high-level divided areas.

[0032] The providing unit 13 provides the near-miss level set (including resetting) by the reset determination unit 12 to the driving assistance device 100 of the vehicle V. The providing unit 13 provides the vehicle V with a corresponding near-miss level depending on the region or divided area in which the vehicle V is traveling.

[0033] Next, the setting and resetting of the near-accident level performed in the support information providing device 1 and the flow of the near-accident level providing process will be described. When the process shown in Fig. 4 reaches an end, the process is restarted from the start after a predetermined time. Furthermore, the process of providing the near-accident level in S110 is not limited to being performed after the process of S109 or S111, and may be performed at a timing different from S101 to S109 and S111. As shown in Fig. 4, the level setting unit 11 acquires unstable behavior information (S101). Next, the level setting unit 11 sets a near-accident level for each of a plurality of divided areas based on the unstable behavior information (S102).

[0034] The resetting determination unit 12 calculates the total number of unstable behavior cases in the area to be determined. Furthermore, the resetting determination unit 12 sets a group of areas constituted by high-level divided areas in the area to be determined as a determination area, and calculates the number of unstable behavior cases in the determination area (S103). The resetting determination unit 12 determines whether or not the above-mentioned condition 1 is satisfied (S104). Specifically, the resetting determination unit 12 determines whether or not the proportion of the number of unstable behavior cases in the determination area to the total number of unstable behavior cases in the area is less than a number threshold.

[0035] If condition 1 is not satisfied (S104: NO), the process proceeds to S111. If condition 1 is satisfied (S104: YES), the resetting determination unit 12 sets multiple sub-areas within the region to be determined, and calculates the number of unstable behaviors in each sub-area (S105). Then, the resetting determination unit 12 determines whether or not the above-mentioned condition 2 is satisfied (S106). Specifically, the resetting determination unit 12 determines whether or not the maximum value of the number of unstable behaviors calculated for each of the multiple sub-areas is equal to or greater than the maximum number threshold. If condition 2 is not satisfied (S106: NO), the process proceeds to S111.

[0036] If Condition 2 is satisfied (S106: YES), the reset determination unit 12 determines whether or not the above-mentioned Condition 3 is satisfied (S107). Specifically, the reset determination unit 12 determines whether or not the deviation between the maximum value of the unstable behavior count calculated for each of the multiple sub-areas and the unstable behavior count in the determination area is equal to or greater than a deviation threshold. If Condition 3 is not satisfied (S107: NO), the process proceeds to S111.

[0037] If condition 3 is satisfied (S107: YES), the reset determination unit 12 determines that the near-miss level set in S102 needs to be reset (S108). A case in which it is determined that the near-miss level needs to be reset is when the high-level divided area used in S103 is a singular point where the number of unstable behavior cases is exceptionally high. As a result, due to the exceptionally high number of unstable behavior cases in the high-level divided area, even though there are other divided areas with a relatively high number of unstable behavior cases, the number of unstable behavior cases in these other divided areas appears to be relatively low, and the near-miss level set for these other divided areas becomes low.

[0038] If it is determined that the near-miss level needs to be reset, the level setting unit 11 resets the near-miss level for each divided area excluding the high-level divided area among the multiple divided areas in the region that is the subject of the determination (S109). The providing unit 13 provides the near-miss level set (reset) by the level setting unit 11 to the driving assistance device 100 of the vehicle V (S110).

[0039] Furthermore, if condition 1 is not satisfied (S104: NO), if condition 2 is not satisfied (S106: NO), or if condition 3 is not satisfied (S107: NO), the reset determination unit 12 determines that resetting of the near-miss level set in S102 is unnecessary (S111). Thereafter, the process proceeds to S110. Note that a case where these conditions are not satisfied means that the high-level divided area used in S103 is not a peculiar point where the number of unstable behaviors is exceptionally high, and it is considered that unstable behaviors do not occur frequently in other divided areas. In other words, this is the case where an appropriate near-miss level is set for each divided area within the region to be set.

[0040] As described above, when determining whether or not to reset the near-miss level, the reset determination unit 12 in the support information providing device 1 determines, as Condition 1, whether the ratio of the number of unstable behaviors in the determination area to the total number of unstable behaviors in the area is less than the number threshold. Condition 1 is satisfied when it is considered that a large number of unstable behaviors have occurred in divided areas other than the determination area within the area being determined. This is when it is considered that a high near-miss level should be set for divided areas other than the determination area. Therefore, the level setting unit 11 resets the near-miss levels for divided areas other than the initially set high-level divided areas (divided areas for which a high level was initially set) based on the determination result by the reset determination unit 12 using Condition 1. This allows the level setting unit 11 to set a high near-miss level for divided areas that had a relatively high number of unstable behaviors but had previously had a low near-miss level set due to the presence of a high-level divided area with an exceptionally high number of unstable behaviors. In this way, the support information providing device 1 can more appropriately set near-miss levels and provide them to the vehicle's driving support device.

[0041] When determining whether or not to reset the near-miss level, the reset determination unit 12 further determines, as condition 2, whether the maximum value of the number of unstable behaviors calculated for each of the multiple sub-areas is equal to or greater than the maximum number threshold. Condition 2 is satisfied when it is considered that unstable behaviors are occurring frequently in areas other than the determination area within the region to be determined. Therefore, the level setting unit 11 resets the near-miss levels for divided areas other than the initially set high-level divided area, based on the determination results made by the reset determination unit 12 using conditions 1 and 2. This allows the level setting unit 11 to more appropriately set the near-miss level based on whether or not unstable behaviors are occurring frequently in areas other than the determination area.

[0042] When determining whether or not to reset the near-miss level, the reset determination unit 12 further determines, as condition 3, whether the deviation between the maximum value of the number of unstable behaviors calculated for each of the multiple sub-areas and the number of unstable behaviors in the determination area is equal to or greater than a deviation threshold. Condition 3 is satisfied when, within the region to be determined, occurrences of unstable behaviors are concentrated in the initially set high-level divided area. By using this condition 3, the reset determination unit 12 can more appropriately determine that the number of unstable behaviors in the initially set high-level divided area is significantly higher than in the other divided areas.

[0043] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. For example, in the above embodiments, the reset determination unit 12 determines that the near-miss level needs to be reset when all of conditions 1 to 3 are satisfied. However, the present disclosure is not limited to this, and the reset determination unit 12 may further use the following condition 4. In this case, the reset determination unit 12 determines that the near-miss level needs to be reset when the following condition 4 is satisfied in addition to when all of the above conditions 1 to 3 are satisfied. (Condition 4): The size of the judgment area is equal to or smaller than a predetermined area threshold.

[0044] Condition 4 is satisfied when unstable behavior occurs in a concentrated manner within a small area. Therefore, the reset determination unit 12 can determine that the determination area is an area where unstable behavior occurs in a concentrated manner within a small area within the region. Then, the reset determination unit 12 can determine that the near miss level needs to be reset when the determination area is of such a small range. In this way, the reset determination unit 12 can determine whether the determination area is a singular point where unstable behavior is locally concentrated in large numbers.

[0045] Furthermore, the reset determination unit 12 is not limited to determining that resetting of the near-miss level is necessary when all of the above-mentioned conditions 1 to 3 are satisfied. For example, the reset determination unit 12 may use only condition 1 and determine that resetting is necessary when condition 1 is satisfied. Furthermore, the reset determination unit 12 may use only conditions 1 and 2 and determine that resetting is necessary when conditions 1 and 2 are satisfied. [Explanation of symbols]

[0046] 1...assistance information providing device, 11...level setting unit, 12...resetting determination unit, 13...providing unit, 100...driving assistance device, A...area, A1, A2...divided area, B...area, B10, B11 to B14...divided area, C...determination area, D...sub-area, V...vehicle.

Claims

1. An assistance information providing device that provides a near miss level indicating the likelihood of a near miss event occurring in a vehicle to a driving assistance device of the vehicle, a level setting unit that sets the near-miss level for each of the divided areas obtained by dividing a region into a plurality of areas based on unstable behavior information including location information where the vehicle exhibited unstable behavior different from that during normal driving; A reset determination unit that determines whether or not the set near-miss level needs to be reset; A providing unit that provides the set near-miss level to the driving assistance device; Equipped with The level setting unit calculating a number of unstable behaviors, which is the number of times the vehicle exhibited unstable behavior, for each of the plurality of divided areas based on the unstable behavior information; Based on the relationship between the number of unstable behaviors in the plurality of divided areas within the region, the near-miss level is set for each of the plurality of divided areas so that the near-miss level is higher for the divided area with a larger number of unstable behaviors within the region; The reset determination unit A block of area constituted by the high level divided area, which is the divided area with the highest near-miss level within the region, is set as a judgment area, Calculating the number of unstable behaviors in the determination area based on the unstable behavior information; Calculating the total number of the unstable behavior cases within the area; When the ratio of the number of unstable behaviors in the determination area to the total number of unstable behaviors in the region is less than a number threshold, it is determined that resetting is necessary; When the reset determination unit determines that resetting is necessary, the level setting unit: The near-miss level is reset for the divided areas excluding the high-level divided area among the plurality of divided areas within the region, A support information providing device that resets the near-miss level based on the relative number of unstable behaviors in multiple divided areas within the region, excluding the high-level divided area, so that the near-miss level is higher in divided areas with a higher number of unstable behaviors.

2. The reset determination unit Dividing the region into the determination area and a plurality of sub-areas each having a size corresponding to the determination area; calculating the number of unstable behaviors for each of the plurality of sub-areas based on the unstable behavior information; The support information providing device according to claim 1, wherein the device determines that resetting is necessary when the proportion of the number of unstable behavior cases in the judgment area to the total number of unstable behavior cases in the region is less than a number threshold, and when the maximum value of the number of unstable behavior cases calculated for each of the plurality of sub-areas is equal to or greater than a maximum number threshold.

3. The reset determination unit a ratio of the number of unstable behavior cases in the determination area to the total number of unstable behavior cases in the region is less than a number threshold, the maximum value of the number of unstable behaviors calculated for each of the plurality of sub-areas is equal to or greater than a maximum number threshold, and determining that resetting is necessary when a deviation between the maximum value of the number of unstable behaviors calculated for each of the plurality of sub-areas and the number of unstable behaviors in the judgment area is equal to or greater than a deviation threshold.

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