JP2021124467A - Passing difficulty acquisition device, guide information generation device, passing difficulty acquisition method, passing difficulty acquisition program, and storage medium - Google Patents

Abstract

To easily acquire the difficulty in passing.SOLUTION: A passing difficulty acquisition device 324 comprises: a distance acquisition unit 324A that acquires the distance from an intersection area where a plurality of roads intersect with each other to a stop line before the intersection area; and a passing difficulty acquisition unit 324B that, based on the distance, acquires the difficulty in passing of at least one of a stop point where the stop line is provided and a periphery of the stop point.SELECTED DRAWING: Figure 3

Description

The present invention relates to a passage difficulty acquisition device, a guidance information generation device, a passage difficulty acquisition method, a passage difficulty acquisition program, and a storage medium.

Conventionally, there is known a pause notification device that notifies a suspension point when a vehicle approaches a pause point that needs to be paused (see, for example, Patent Document 1).
The temporary stop notification device described in Patent Document 1 determines the degree of visibility at the temporary stop point based on the object information and the road information regarding the road shape of the road on which the temporary stop point exists. Here, the object information is information about objects such as fences, facilities, trees, parked vehicles, and other vehicles existing around the temporary stop point. Then, the suspension notification device changes the notification mode of the notification regarding the suspension point according to the determination result.

Japanese Unexamined Patent Publication No. 2007-24834

However, the suspension notification device described in Patent Document 1 uses a large amount of information (object information and road information regarding various objects) in determining the degree of visibility at the suspension point. For this reason, one example is the problem that it is not possible to easily obtain the difficulty level of passage such as visibility at the temporary stop point.

The present invention has been made in view of the above, for example, a passage difficulty acquisition device, a guidance information generator, a passage difficulty acquisition method, a passage difficulty acquisition program, and a passage difficulty acquisition program capable of easily acquiring the passage difficulty level. The purpose is to provide a storage medium.

The passage difficulty acquisition device according to claim 1 has a distance acquisition unit that acquires a distance from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area, and the stop line based on the distance. It is characterized by including a passage difficulty acquisition unit for acquiring at least one of the provided stop points and the vicinity of the stop points.

Further, the guidance information generating device according to claim 2 is a guidance regarding at least one of the stop point and the vicinity of the stop point based on the passage difficulty acquisition device according to claim 1 and the passage difficulty. It is characterized by including a guidance information generation unit for generating information.

The passage difficulty acquisition method according to claim 6 is a passage difficulty acquisition method executed by the passage difficulty acquisition device, from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area. Includes a distance acquisition step for acquiring a distance, and a passage difficulty acquisition step for acquiring at least one of the passage difficulty levels of the stop point provided with the stop line and the vicinity of the stop point based on the distance. It is characterized by.

Further, the passage difficulty acquisition program according to claim 7 includes a distance acquisition step of acquiring a distance from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area, and the stop based on the distance. It is a passage difficulty acquisition program for causing a computer to execute a passage difficulty acquisition step of acquiring at least one of the passage difficulty of a stop point provided with a line and the vicinity of the stop point.

The storage medium according to claim 8 is provided with a distance acquisition step for acquiring a distance from an intersection region where a plurality of roads intersect to a stop line in front of the intersection region, and the stop line based on the distance. It is characterized in that it stores a passage difficulty acquisition program for causing a computer to execute a passage difficulty acquisition step for acquiring at least one of the stop points and the vicinity of the stop point.

FIG. 1 is a block diagram showing a configuration of a guidance information generation system according to an embodiment. FIG. 2 is a block diagram showing a configuration of an in-vehicle terminal. FIG. 3 is a block diagram showing the configuration of the guidance information generator. FIG. 4 is a flowchart showing the first operation. FIG. 5 is a diagram illustrating the first operation. FIG. 6 is a diagram illustrating the first operation. FIG. 7 is a flowchart showing the second operation. FIG. 8 is a diagram illustrating the second operation. FIG. 9 is a diagram illustrating the second operation.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the description of the drawings, the same parts are designated by the same reference numerals.

[Outline configuration of guidance information generation system]
FIG. 1 is a block diagram showing a configuration of the guidance information generation system 1 according to the embodiment.
The guidance information generation system 1 is a system that generates guidance information based on the difficulty level of passage at the temporary stop point. As shown in FIG. 1, the guidance information generation system 1 includes an in-vehicle terminal 2 and a guidance information generation device 3. Then, the in-vehicle terminal 2 and the guidance information generation device 3 communicate with each other via the network NE (FIG. 1), which is a wireless communication network.
Although the number of in-vehicle terminals 2 that communicate with the guidance information generator 3 is limited to one in FIG. 1, it is actually a plurality of in-vehicle terminals mounted on a plurality of vehicles.

[Configuration of in-vehicle terminal]
FIG. 2 is a block diagram showing the configuration of the in-vehicle terminal 2.
The in-vehicle terminal 2 is, for example, a stationary navigation device or a drive recorder installed in the vehicle VE. The in-vehicle terminal 2 is not limited to the navigation device or the drive recorder, and a portable terminal such as a smartphone used by the occupant of the vehicle VE may be adopted. As shown in FIG. 2, the in-vehicle terminal 2 includes an operation input unit 21, a display unit 22, a voice output unit 23, a sensor unit 24, and a terminal body 25.

The operation input unit 21 is composed of buttons, switches, a touch panel, etc. that accept user operations, and outputs operation signals corresponding to the user operations to the terminal body 25.
The display unit 22 is composed of a display using a liquid crystal display, an organic EL (Electro Luminescence), or the like, and displays various images under the control of the terminal body 25.
The audio output unit 23 includes a speaker 231 (see FIGS. 5 and 6), converts a digital audio signal acquired from the terminal body 25 into an analog audio signal by D / A (Digital / Analog) conversion, and converts the speaker into an analog audio signal. The audio corresponding to the analog audio signal is output from 231.

As shown in FIG. 2, the sensor unit 24 includes a GNSS (Global Navigation Satellite System) sensor 241, a vehicle speed sensor 242, and an acceleration sensor 243.
The GNSS sensor 241 uses GNSS to receive radio waves including positioning data transmitted from a navigation satellite. The positioning data is used to detect the absolute position of the vehicle VE from latitude and longitude information and the like. The GNSS used may be, for example, GPS (Global Positioning System) or another system.
The vehicle speed sensor 242 detects the traveling speed of the vehicle VE and generates vehicle speed data corresponding to the traveling speed.
The acceleration sensor 243 detects the acceleration of the vehicle VE and generates acceleration data according to the acceleration.
Then, the sensor unit 24 outputs output data such as the above-mentioned positioning data, vehicle speed data, and acceleration data to the terminal body 25.

As shown in FIG. 2, the terminal body 25 includes a communication unit 251, a control unit 252, and a storage unit 253.
The communication unit 251 transmits and receives information to and from the guidance information generation device 3 via the network NE under the control of the control unit 252.
The control unit 252 is realized by executing various programs stored in the storage unit 253 by a controller such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and controls the operation of the entire vehicle-mounted terminal 2. .. The control unit 252 is not limited to the CPU and MPU, and may be configured by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).
The storage unit 253 is equipped with various programs executed by the control unit 252, data required when the control unit 252 performs processing, a terminal ID (Identifier) that uniquely identifies the vehicle-mounted terminal 2, and the vehicle-mounted terminal 2. Stores vehicle information and the like regarding the length and width of the vehicle VE.

[Configuration of guidance information generator]
FIG. 3 is a block diagram showing the configuration of the guidance information generation device 3.
The guidance information generation device 3 is, for example, a server device. As shown in FIG. 3, the guidance information generation device 3 includes a communication unit 31, a control unit 32, and a storage unit 33.

The communication unit 31 transmits and receives information to and from the vehicle-mounted terminal 2 (communication unit 251) via the network NE under the control of the control unit 32.
The control unit 32 is realized by executing various programs (including a passage difficulty acquisition program according to the present embodiment) stored in the storage unit 33 by a controller such as a CPU or MPU, and is a guidance information generation device. 3 Control the operation of the whole. The control unit 32 is not limited to the CPU and MPU, and may be configured by an integrated circuit such as an ASIC or FPGA. As shown in FIG. 3, the control unit 32 includes an information acquisition unit 321, a map data extraction unit 322, a route search unit 323, a distance acquisition unit 324A, a passage difficulty acquisition unit 324B, and a difficulty correction unit. It includes a 325 and a guidance information generation unit 326.

The information acquisition unit 321 acquires various types of information from the in-vehicle terminal 2 via the communication unit 31. The various types of information include destination information, route search request information, output data from the sensor unit 24 (positioning data, vehicle speed data, and acceleration data), terminal ID and vehicle information stored in the storage unit 253. .. That is, the information acquisition unit 321 corresponds to the vehicle information acquisition unit according to the present embodiment. The destination information is information about the "destination" input to the operation input unit 21. The route search request information is information input to the operation input unit 21 and is information for requesting a route search from the current position to the destination.

The map data extraction unit 322 extracts map data of an area including the current position of the vehicle VE estimated from the positioning data acquired by the information acquisition unit 321 from the storage unit 33. Then, the map data extraction unit 322 transmits the extracted map data to the in-vehicle terminal 2 mounted on the vehicle VE via the communication unit 31. The vehicle-mounted terminal 2 that has received the map data displays a map image or the like based on the map data on the display unit 22.
The route search unit 323 executes the following route search process when the route search request information is acquired by the information acquisition unit 321.
Specifically, the route search unit 323 refers to the map data stored in the storage unit 33, and refers to the information acquisition unit from the current position of the vehicle VE estimated from the positioning data acquired by the information acquisition unit 321. The route to the destination is searched based on the destination information acquired in 321. Then, the route search unit 323 transmits the route information related to the route to the in-vehicle terminal 2 mounted on the vehicle VE via the communication unit 31. The vehicle-mounted terminal 2 that has received the route information superimposes a route image or the like based on the route information on the map image displayed on the display unit 22.

The distance acquisition unit 324A and the passage difficulty acquisition unit 324B correspond to the passage difficulty acquisition device 324 according to the present embodiment. The passage difficulty acquisition device 324 acquires at least one of the passage difficulty of the stop point and the vicinity of the stop point. Here, the "temporary stop point" corresponds to the stop point according to the present embodiment. The "temporary stop point" according to the present embodiment is a point designated to be temporarily stopped, and among the roads connecting to the intersection where no traffic light is provided, the priority specified by the Road Traffic Act. It is a stop point provided on a non-priority road that is not a road. Further, the “difficulty level of passage at the temporary stop point” means the difficulty level when the vehicle VE passes through the temporary stop point from the non-priority road to the intersection connecting to the priority road. On the other hand, the "difficulty of passage around the temporary stop point" is the area around the temporary stop point provided on the non-priority road by entering the non-priority road through an intersection connecting the priority road to the non-priority road ( It means the difficulty level when passing through (the lane opposite to the lane in which the stop point is provided).

Based on the map data stored in the storage unit 33, the distance acquisition unit 324A acquires the distance from the priority road (intersection) to the stop line, which is the position to be stopped at the temporary stop point provided in front of the intersection. do.
Based on the distance, the passage difficulty acquisition unit 324B acquires at least one of the passage difficulty of the stop point where the stop line is provided and the vicinity of the stop point.

The difficulty correction unit 325 corrects the passage difficulty acquired by the passage difficulty acquisition unit 324B and acquires the corrected passage difficulty based on the vehicle information acquired by the information acquisition unit 321.
The guidance information generation unit 326 generates guidance information regarding at least one of the temporary stop point and the vicinity of the temporary stop point based on the corrected passage difficulty level. Then, the guidance information generation unit 326 transmits the guidance information to the corresponding in-vehicle terminal 2 via the communication unit 31. The vehicle-mounted terminal 2 that has received the guidance information notifies the guidance information from the display unit 22 and the voice output unit 23.

The storage unit 33 stores various programs executed by the control unit 32 (including the guidance information generation program according to the present embodiment), as well as data and the like necessary for the control unit 32 to perform processing. As shown in FIG. 3, the storage unit 33 includes a map DB 331.
The map DB 331 stores the map data. The map data includes priority road information and stop position information in addition to road data represented by a link corresponding to a road and a node corresponding to a connecting portion (intersection) of the road.
The priority road information is information for determining whether each road included in the road data is a priority road or a non-priority road.
The stop position information is provided for each temporary stop line at the temporary stop point, and is information indicating the position of the temporary stop line.

[How to generate guidance information]
Next, the guidance information generation method executed by the guidance information generation device 3 will be described.
Before executing the guidance information generation method described below, the guidance information generation device 3 (information acquisition unit 321) acquires various information from the in-vehicle terminal 2 mounted on the vehicle VE at a predetermined cycle. It is assumed that it is in the state of being. The various types of information include destination information, route search request information, output data from the sensor unit 24 (positioning data, vehicle speed data, and acceleration data), terminal ID and vehicle information stored in the storage unit 253. .. Further, before executing the guidance information generation method described below, the guidance information generation device 3 (route search unit 323) executes the route search process based on the route search information, the destination information, and the like. It shall be. That is, the in-vehicle terminal 2 is in a state of displaying the map image corresponding to the area including the current position of the vehicle VE and the route image according to the route obtained by the route search process on the display unit 22. It shall be.

Hereinafter, as the guidance information generation method, the first and second operations of the guidance information generation device 3 will be described in order. The first operation is an operation of generating characteristic guidance information when the vehicle VE enters the non-priority road through an intersection connecting the priority road to the non-priority road. On the other hand, the second operation is an operation of generating characteristic guidance information when the vehicle VE passes through a temporary stop point from a non-priority road to an intersection connecting to a priority road.

[First operation]
FIG. 4 is a flowchart showing the first operation. 5 and 6 are diagrams for explaining the first operation. Specifically, FIGS. 5 and 6 are diagrams showing an area including an intersection CR where the priority road R1 and the non-priority road R2 intersect.
In addition, in FIG. 5 and FIG. 6, the intersection CR (the region where the priority road R1 and the non-priority road R2 intersect) is shown by a alternate long and short dash line. Here, the intersection CR corresponds to the intersection region according to the present embodiment. Further, FIG. 5 illustrates a stop line L1 at a stop point located at a place where the visibility between the priority road R1 and the non-priority road R2 is poor due to buildings B1, B2 and the like. Further, the distance D1 is the distance from the temporary stop line L1 to the priority road R1 (intersection CR), and the passage difficulty level of the temporary stop point provided with the temporary stop line L1 shown in FIG. 5 and the temporary stop. The difficulty level of passage around the point is the first difficulty level of passage, which will be described later. On the other hand, FIG. 6 illustrates a stop line L2 at a stop point located at a place with good visibility between the priority road R1 and the non-priority road R2. Further, the distance D2 is the distance from the temporary stop line L2 to the priority road R1 (intersection CR). The difficulty level of the passage at the stop point provided with the stop line L2 shown in FIG. 6 and the difficulty level of the passage around the stop point are the second difficulty levels described later.

First, the guidance information generation unit 326 constantly monitors whether or not the current position of the vehicle VE estimated from the positioning data acquired by the information acquisition unit 321 approaches a predetermined distance from the guidance point (step S1A). ). The guide point means a branch point to be changed, such as an intersection that turns left or right, on the route obtained by the route search process.
When it is determined that the distance from the guide point is not close to a predetermined distance (step S1A: No), the control unit 32 repeats step S1A.

On the other hand, when it is determined that the vehicle has approached a predetermined distance from the guidance point (step S1A: Yes), the guidance information generation unit 326 determines whether or not there is a temporary stop point on the road on which the vehicle VE enters (step). S1B).
Specifically, the guidance information generation unit 326 refers to the map data (road data and priority road information) stored in the map DB 331, and determines whether or not the road on which the vehicle VE enters is a non-priority road. Then, when the guidance information generation unit 326 determines that the road on which the vehicle VE enters is a non-priority road, the guide information generation unit 326 refers to the map data (stop position information) stored in the map DB331 and temporarily enters the non-priority road. Determine if there is a stop point.

When it is determined that there is a temporary stop point on the road on which the vehicle VE enters (step S1B: Yes), the traffic difficulty acquisition device 324 acquires the traffic difficulty around the temporary stop point (step S1C). (Distance acquisition step) and step S1D (traffic difficulty acquisition step)). The steps S1C and S1D constitute a passage difficulty acquisition method according to the present embodiment.

By the way, the position of the stop line is individually and specifically determined according to the road traffic conditions. For example, as can be seen by comparing the distances D1 and D2 shown in FIGS. 5 and 6, when the visibility between the priority road R1 and the non-priority road R2 is poor (FIG. 5), the visibility is good. Compared with (Fig. 6), the distance between the stop line and the priority road tends to be longer. In addition to cases where the outlook is poor, even if there is a large influx of vehicles from the priority road to the non-priority road or the width of the non-priority road is narrow, the temporary stop line provided on the non-priority road will be used. , Tends to be located deeper than the priority road.

Therefore, the passage difficulty acquisition device 324 acquires the passage difficulty around the temporary stop point determined in step S1B by utilizing the above-mentioned tendency.
That is, the distance acquisition unit 324A refers to the map data (road data and stop position information) stored in the map DB331, and acquires the distance from the temporary stop line at the temporary stop point determined in step S1B to the priority road. (Step S1C). Then, when the acquired distance is equal to or longer than a predetermined distance (for example, 4 m), the passage difficulty acquisition unit 324B sets the passage difficulty around the temporary stop point as the first passage difficulty (step S1D). .. On the other hand, when the acquired distance is less than the predetermined distance, the passage difficulty acquisition unit 324B sets the passage difficulty around the temporary stop point to a second passage difficulty lower than the first passage difficulty. (Step S1D).

For example, when the stop line at the stop point determined in step S1B is the stop line L1 shown in FIG. 5, the distance D1 is acquired in step S1C. Then, in step S1D, the first passage difficulty level is acquired as the passage difficulty level around the temporary stop point. On the other hand, when the stop line at the stop point determined in step S1B is the stop line L2 shown in FIG. 6, the distance D2 is acquired in step S1C. Then, in step S1D, a second passage difficulty level is acquired as the passage difficulty level around the temporary stop point.

After step S1D, the difficulty level correction unit 325 corrects the traffic difficulty level around the temporary stop point acquired in step S1D based on the vehicle information acquired by the information acquisition unit 321 to correct the traffic difficulty level. Acquire the degree (step S1E).
Specifically, in the difficulty correction unit 325, the passage difficulty around the temporary stop point acquired in step S1D is the second passage difficulty, and the first and second conditions shown below are satisfied. When at least one of them is satisfied, the second passage difficulty level is corrected to the first passage difficulty level. That is, the difficulty correction unit 325 acquires the first passage difficulty as the correction passage difficulty. In cases other than this case, the difficulty correction unit 325 acquires the passage difficulty around the temporary stop point acquired in step S1D as it is as the correction passage difficulty.
The first condition is that the vehicle length of the vehicle VE based on the vehicle information acquired by the information acquisition unit 321 is equal to or longer than the predetermined length.
The second condition is that the vehicle width of the vehicle VE based on the vehicle information acquired by the information acquisition unit 321 is equal to or larger than a predetermined width.

After step S1E, the guidance information generation unit 326 determines whether or not the corrected passage difficulty level acquired in step S1E is the first passage difficulty level (step S1F).
When it is determined that the corrected passage difficulty level is the first passage difficulty level (step S1F: Yes), the guidance information generation unit 326 provides guidance information regarding the vicinity of the temporary stop point, which is the first aspect of guidance. Generate information (step S1G). Then, the guidance information generation unit 326 transmits the guidance information to the corresponding in-vehicle terminal 2 via the communication unit 31. In the in-vehicle terminal 2 that has received the guidance information, for example, as shown in FIG. 5, the voice regarding the course change at the guidance point based on the guidance information, "Turn left 20 m ahead.", And the guidance information. A voice calling attention to "Please be careful of vehicles in the blind spot" is output.

On the other hand, when it is determined that the corrected passage difficulty level is the second passage difficulty level (step S1F: No), and when it is determined that there is no temporary stop point on the road on which the vehicle VE enters (step S1B: No). The guidance information generation unit 326 executes the following processing (step S1H).
Specifically, the guidance information generation unit 326 generates guidance information in a second aspect different from the first aspect as guidance information regarding the vicinity of the temporary stop point. Then, the guidance information generation unit 326 transmits the guidance information to the corresponding in-vehicle terminal 2 via the communication unit 31. In the in-vehicle terminal 2 that has received the guidance information, for example, as shown in FIG. 6, only the voice regarding the course change at the guidance point, "Turn left 20 m ahead" based on the guidance information, is output from the speaker 231. ..

After step S1G and step S1H, the guidance information generation unit 326 arrives at the destination on the route obtained by the route search process with the current position of the vehicle VE estimated from the positioning data acquired by the information acquisition unit 321. It is determined whether or not it has been done (step S1I).
When it is determined that the destination has arrived (step S1I: Yes), the control unit 32 ends the first operation.
On the other hand, if it is determined that the destination has not arrived (step S1I: No), the control unit 32 returns to step S1A.

[Second operation]
FIG. 7 is a flowchart showing the second operation. 7 and 8 are diagrams illustrating the second operation. Specifically, FIGS. 7 and 8 are views showing the same regions as those of FIGS. 5 and 6, respectively.

First, the guidance information generation unit 326 constantly monitors whether or not there is a temporary stop point within a predetermined distance in the traveling direction of the vehicle VE (step S2A).
Specifically, the guidance information generation unit 326 refers to the map data (road data and priority road information) stored in the map DB 331, and the vehicle VE estimated from the positioning data acquired by the information acquisition unit 321. Determine if the road corresponding to the current position is a non-priority road. Then, when the guidance information generation unit 326 determines that the road corresponding to the current position of the vehicle VE is a non-priority road, the guide information generation unit 326 refers to the map data (stop position information) stored in the map DB 331 and refers to the vehicle. It is determined whether or not there is a pause point within a predetermined distance in the traveling direction of the VE.

When it is determined that there is no temporary stop point within a predetermined distance in the traveling direction (step S2A: No), the control unit 32 repeats step S2A.
On the other hand, when it is determined that there is a temporary stop point within a predetermined distance in the traveling direction (step S2A: Yes), the passage difficulty acquisition device 324 is in step S2B (distance acquisition step) similar to steps S1C and S1D, respectively. ) And step S2C (traffic difficulty acquisition step). That is, in step S2B, the distance from the stop line to the priority road at the stop point determined in step S2A is acquired. Further, in step S2C, the difficulty level of passage at the temporary stop point is acquired.

For example, when the stop line at the stop point determined in step S2A is the stop line L1 shown in FIG. 8, the distance D1 is acquired in step S2B. Then, in step S2C, the first passage difficulty level is acquired as the passage difficulty level of the temporary stop point. On the other hand, when the stop line at the stop point determined in step S2A is the stop line L2 shown in FIG. 9, the distance D2 is acquired in step S2B. Then, in step S2C, a second passage difficulty level is acquired as the passage difficulty level of the temporary stop point.

After step S2C, the difficulty level correction unit 325 corrects the passage difficulty level of the temporary stop point acquired in step S2C based on the vehicle information acquired by the information acquisition unit 321 as in step S1E. To obtain the corrected passage difficulty level (step S2D).
After step S2D, the guidance information generation unit 326 executes step S2E similar to step S1F.

When it is determined that the corrected passage difficulty level is the first passage difficulty level (step S2E: Yes), the guidance information generation unit 326 provides the guidance information according to the third aspect as the guidance information regarding the temporary stop point. Generate (step S2F). Then, the guidance information generation unit 326 transmits the guidance information to the corresponding in-vehicle terminal 2 via the communication unit 31. In the in-vehicle terminal 2 that has received the guidance information, for example, as shown in FIG. 8, a warning sound "pawn" based on the guidance information and a "pause at the stop line" based on the guidance information should be paused from the speaker 231. A voice prompting a pause is output.

On the other hand, when it is determined that the corrected passage difficulty level is the second passage difficulty level (step S2E: No), the guidance information generation unit 326 differs from the third mode as guidance information regarding the temporary stop point. The guidance information according to the fourth aspect is generated (step S2G). Then, the guidance information generation unit 326 transmits the guidance information to the corresponding in-vehicle terminal 2 via the communication unit 31. In the vehicle-mounted terminal 2 that has received the guidance information, for example, as shown in FIG. 9, only the warning sound "pawn" based on the guidance information is output from the speaker 231.

After step S2F and step S2G, the guidance information generation unit 326 executes step S2H similar to step S1I.
When it is determined that the destination has arrived (step S2H: Yes), the control unit 32 ends the second operation.
On the other hand, if it is determined that the destination has not arrived (step S2H: No), the control unit 32 returns to step S2A.

According to the present embodiment described above, the following effects are obtained.
The passage difficulty acquisition device 324 according to the present embodiment acquires the distance from the intersection to the temporary stop line in front of the intersection, and based on the distance, the temporary stop point where the temporary stop line is provided and the relevant stop line. Obtain at least one of the difficulty levels around the stop point. That is, the passage difficulty acquisition device 324 acquires the passage difficulty based on very little information of only the distance.
Therefore, according to the passage difficulty acquisition device 324 according to the present embodiment, the passage difficulty can be easily acquired.

Further, the guidance information generation device 3 according to the present embodiment provides guidance information regarding at least one of the temporary stop point and the vicinity of the temporary stop point based on the traffic difficulty level acquired by the traffic difficulty level acquisition device 324. To generate. Therefore, it is possible to generate appropriate guidance information according to the difficulty level of passage, and it is possible to provide appropriate information to the driver of the vehicle VE passing through the temporary stop point and the vicinity of the temporary stop point.

Further, the guidance information generation device 3 generates guidance information when the vehicle VE travels from the intersection toward the vicinity of the temporary stop point and is located within a predetermined distance range from the temporary stop point. Therefore, for example, in the situations shown in FIGS. 5 and 6, appropriate information can be provided to the driver of the vehicle VE.

Further, when the vehicle VE travels toward the temporary stop point in front of the intersection on the road connected to the intersection and is located within a predetermined distance range from the temporary stop point, the guidance information generation device 3 is used. Generate guidance information. Therefore, for example, in the situations shown in FIGS. 8 and 9, appropriate information can be provided to the driver of the vehicle VE.

By the way, the difficulty level of the passage at the temporary stop point and the difficulty level of the passage around the temporary stop point also depend on the length and width of the vehicle VE passing through the temporary stop point and the vehicle VE passing around the temporary stop point. It will change. For example, a vehicle VE having a larger vehicle length or width occupies a larger area to pass through, so that the difficulty level of passage becomes higher.
Therefore, the guidance information generation device 3 according to the present embodiment corrects the passing difficulty level based on the vehicle information regarding the size of the vehicle VE to acquire the corrected passing difficulty level, and based on the corrected passing difficulty level. Generate guidance information. Therefore, by changing the passage difficulty level to an appropriate corrected passage difficulty level, appropriate guidance information can be generated.

(Other embodiments)
Although the embodiments for carrying out the present invention have been described so far, the present invention should not be limited only to the above-described embodiments.
In the above-described embodiment, the passage difficulty acquisition device 324 is provided in the guidance information generation device 3, but the present invention is not limited to this, and the in-vehicle terminal 2 may be provided. Similarly, at least a part of the configuration other than the passage difficulty acquisition device 324 in the guidance information generation device 3 may be provided in the in-vehicle terminal 2.

In the above-described embodiment, as the "stop point", a temporary stop point provided on a non-priority road that is not a priority road specified by the Road Traffic Act among roads connecting to an intersection without a traffic light is adopted. It was, but it is not limited to this. For example, as the "stop point", a stop point provided in front of the intersection may be adopted on a road connected to an intersection provided with a traffic light.

In the above-described embodiment, the stop position information may be registered in the map data stored in the map DB 331 as shown below.
The guidance information generation device 3 estimates a probable stop position by a statistical method from the positions of a plurality of vehicles on which the pause operation is performed. In the determination of whether or not the pause operation has been performed, vehicle speed data, acceleration data, and the like acquired from each in-vehicle terminal mounted on the plurality of vehicles are used. For example, the guidance information generator 3 determines that the vehicle has performed the pause operation when at least one of the first and second conditions shown below is satisfied.
The first condition is that the traveling speed of the vehicle becomes "0".
The second condition is that the acceleration of the vehicle shows a peculiar acceleration pattern that appears when the pause operation is performed after the acceleration of the vehicle becomes a negative predetermined value or more with respect to the traveling direction of the vehicle. be.
Then, when the stop position information regarding the same position as the stop position is not yet registered in the map data, the guidance information generation device 3 newly registers the information regarding the stop position in the map data as the stop position information. ..

In the above-described embodiment, the passage difficulty is divided into two stages of "high" and "low", and two passage difficulty levels (first and second passage difficulty levels) are provided, but the present invention is not limited to this. .. For example, the rank may be divided into three or more stages and three or more difficulty levels may be provided so that the longer the distance from the intersection to the stop line in front of the intersection, the higher the rank. Then, as the rank of the difficulty level of passage increases, for example, information that calls attention is strengthened as guidance information (for example, a warning sound or a warning image that is easier to recognize is added).

In the above-described embodiment, the temporary stop point provided with the temporary stop line or the temporary stop point depending on whether or not the distance from the temporary stop line to the priority road is a predetermined distance (for example, 4 m) or more. The traffic difficulty in the surrounding area was acquired (steps S1D and S2C), and then the traffic difficulty was corrected based on the vehicle information (steps S1E and S2D), but the present invention is not limited to this. For example, the distance from the stop line to the priority road is the distance after changing the above-mentioned predetermined distance, which is a threshold value for determining the difficulty of passage, based on the length or width of the vehicle VE based on the vehicle information. Depending on whether or not the distance is greater than or equal to the changed predetermined distance, the difficulty level of passage around the temporary stop point where the temporary stop line is provided or the vicinity of the temporary stop point may be acquired. In this case, considering that the vehicle VE having a larger vehicle length and width has a higher difficulty level, the larger the length and width of the vehicle, the smaller the above-mentioned predetermined distance, which is the threshold value for determining the difficulty level of passage. To change.

In the guidance information generation method described in the above-described embodiment, the difficulty level of the passage at the temporary stop point and the difficulty level of the passage around the temporary stop point may be acquired as shown below.
For example, in the map data stored in the map DB 331, the difficulty level of passage of the temporary stop point and the passage difficulty of the temporary stop point based on the distance from the temporary stop line to the priority road at the temporary stop point for each stop position information are associated with the stop position information. The difficulty level of passage around the stop point is registered in advance. Then, the guidance information generation device 3 acquires the traffic difficulty level around the temporary stop point determined in step S1B and the traffic difficulty level of the temporary stop point determined in step S2A from the map DB331.

In the above-described embodiment, the passage difficulty acquisition device 324 is based only on the distance from the intersection to the stop line in front of the intersection, and at least one of the stop point where the stop line is provided and the vicinity of the stop point. It was acquired the difficulty level of passage, but it is not limited to this. For example, in addition to the distance, the traffic difficulty level may be acquired based on at least one of the accident information, the number of stops information, and the traffic regulation information.
The accident information is information on the number of accidents that have occurred at least on one side of the stop point and the vicinity of the stop point.
The stop count information is information on the average value of the number of times a plurality of vehicles perform a pause operation while reaching the priority road from the pause line at the pause point. It is considered that the longer the distance from the temporary stop line to the priority road, the greater the number of times the temporary stop operation is performed while reaching the priority road from the temporary stop line. Therefore, the passage difficulty acquisition device 324 acquires a higher passage difficulty as the passage difficulty at the temporary stop point and the passage difficulty around the temporary stop point as the average value based on the stop count information is higher.
The traffic regulation information is information on traffic regulation of the road on which the stop point exists. For example, the traffic regulation information is information for distinguishing whether or not the road is located in the school zone. That is, when the traffic difficulty acquisition device 324 determines that the road is located in the school zone based on the traffic regulation information, there is a relatively high possibility that a child will pop out. Obtain a higher level of traffic difficulty than usual as the level of traffic difficulty and the level of traffic at the stop point.

In the guidance information generation device 3 described in the above-described embodiment, the map data extraction unit 322 and the route search unit 323 are not essential configurations and may be omitted. In the guidance information generator that omits the map data extraction unit 322 and the route search unit 323 in this way, the vehicle VE is within a predetermined distance from the stop point such as the temporary stop point without considering the route obtained by the route search process. When the vehicle is located at, the guidance information is generated and transmitted to the in-vehicle terminal 2 mounted on the vehicle VE.

3 Guidance information generator 324 Passage difficulty acquisition device 324A Distance acquisition unit 324B Passage difficulty acquisition unit 325 Difficulty correction unit 326 Guidance information generation unit

Claims (8)

A distance acquisition unit that acquires the distance from the intersection area where a plurality of roads intersect to the stop line in front of the intersection area, and
A passage difficulty acquisition device including a passage difficulty acquisition unit that acquires at least one of the passage difficulty of the stop point provided with the stop line and the vicinity of the stop point based on the distance. .. The passage difficulty acquisition device according to claim 1 and
A guidance information generation device including a guidance information generation unit that generates guidance information regarding at least one of the stop point and the vicinity of the stop point based on the passage difficulty level. The guidance information generation unit
The second aspect of claim 2, wherein the guidance information is generated when the vehicle travels from the intersection region toward the periphery of the stop point and is located within a predetermined distance range from the stop point. Guidance information generator. The guidance information generation unit
When the vehicle travels toward the stop point in front of the intersection area and is located within a predetermined distance range from the stop point on the road connected to the intersection area, the guidance information is generated. The guidance information generation device according to claim 2, which is characterized. The vehicle information acquisition unit that acquires vehicle information related to the size of the vehicle,
Further provided with a difficulty correction unit that corrects the passage difficulty and acquires the corrected passage difficulty based on the vehicle information.
The guidance information generation unit
The guidance information generation device according to any one of claims 2 to 4, wherein the guidance information is generated based on the corrected passage difficulty level. It is a passage difficulty acquisition method executed by the passage difficulty acquisition device.
A distance acquisition step for acquiring the distance from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area, and
A method for acquiring a passage difficulty level, which includes a passage difficulty level acquisition step for acquiring at least one of the passage difficulty levels between the stop point where the stop line is provided and the vicinity of the stop point based on the distance. .. A distance acquisition step for acquiring the distance from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area, and
A passage difficulty acquisition program for causing a computer to execute a passage difficulty acquisition step of acquiring at least one of the passage difficulty levels between the stop point where the stop line is provided and the vicinity of the stop point based on the distance. .. A distance acquisition step for acquiring the distance from an intersection area where a plurality of roads intersect to a stop line in front of the intersection area, and
A passage difficulty acquisition program for causing a computer to execute a passage difficulty acquisition step of acquiring at least one of the passage difficulty of the stop point provided with the stop line and the vicinity of the stop point based on the distance. A storage medium characterized by storing.

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