JP5350852B2 - Navigation information creating apparatus and method, computer program for creating navigation information, and recording medium recording the computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alert message more beneficial for a driver in an intersection as a risk occurrence point. <P>SOLUTION: A record of sudden braking in a road for entering an intersection is specified on the basis of probe information. The road is associated with sudden braking alert information, and an alert message is prepared with reference to traffic regulation information associated with the road and also to traffic regulation information associated with another road or the sudden braking alert information. The prepared alert message is stored in association with the road. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a navigation information creation apparatus and method. More specifically, the present invention relates to a navigation information creation device that creates information associated with a road entering an intersection.

Danger occurrence locations are collected using probe information generated by the probe car, and the collected results are reflected in navigation information used in the navigation system (see Patent Documents 1 to 4). Here, a part where an operation such as a sudden brake or a sudden handle occurs in the probe car is regarded as a dangerous part, and information processing for reflecting it in the navigation information is performed.
If such navigation information is used, a predetermined alert message is output when the vehicle approaches a danger occurrence location during operation of the navigation system.

JP 2003-123185 A JP 2007-323281 A JP 2008-234582 A Japanese Patent Laid-Open No. 2002-116034

In the above-described conventional technology, a warning message is issued when the danger occurrence location is approached, but the content is limited to only the presence of the danger occurrence location.
From the driver's side, even though he can recognize that he is approaching the danger location, he does not know how to be careful.

Therefore, in the present invention, attention is paid to the intersection as a danger occurrence location, and the cause of the danger occurrence is included in the alert message. As a result, when the driver approaches the intersection, the driver needs to pay attention according to the cause, and can concentrate on safe driving.
That is, the first aspect of the present invention is defined as follows.
In the navigation information used in the navigation system, a navigation information creation device for creating information associated with a road entering an intersection,
A probe information storage unit for storing probe information;
A traffic regulation information storage unit for storing traffic regulation information;
A probe information processing unit that extracts and summarizes a sudden braking history from the probe information for a road entering the intersection;
A sudden braking alert information creating unit that compares sudden braking history compiled for the road with a predetermined first rule and creates sudden braking alert information for the road when the first rule is satisfied. When,
A first warning message creating unit that reads traffic regulation information about the road to which the sudden braking warning information is given from the traffic regulation information storage unit and creates a first warning message for alerting;
An information writing unit that writes the emergency braking information and the first warning message to the navigation information storage unit in association with the road;
A navigation information creating apparatus characterized by comprising:

The second aspect of the present invention is defined as follows. That is,
In the navigation information creation device defined in the first aspect, a second alert message creating unit that reads information associated with another road entering the intersection and creates a second alert message for alerting With
The information writing unit writes the second alert message in the navigation information storage unit in association with the road.
According to the invention of the second aspect thus defined, since the second alert message is created based on information associated with other roads entering the intersection, an object to which attention should be paid at the intersection is determined. More concrete. Thereby, it can concentrate by safe operation.

  As information associated with another road, sudden braking warning information obtained by processing probe information for the other road can be used (third aspect). Traffic regulation information can also be used as information associated with other roads (fourth aspect).

The fifth aspect of the present invention is defined as follows. That is,
A navigation information creation method for creating information associated with a road entering an intersection in navigation information used for a navigation system,
Probe information processing step for extracting and summing up sudden braking history from the probe information stored in the probe information storage unit for the road entering the intersection; and
A sudden braking attention awakening information creation step of comparing sudden braking history compiled for the road with a predetermined first rule, and creating sudden braking attention alert information for the road when the first rule is satisfied When,
Read the traffic regulation information about the road to which the sudden braking alert information is given from the traffic regulation information storage unit that stores traffic regulation information, and create a first alert message for alerting Message creation step;
An information writing step of writing the quick braking warning information and the first warning message to the navigation information storage unit in association with the road;
A navigation information creating method characterized by comprising:
According to the navigation information creation method defined in the fifth aspect defined in this manner, the same operation as in the first aspect is achieved.

The sixth aspect of the present invention is defined as follows. That is,
In the navigation information creation method defined in the fifth aspect,
A second alert message creating step of reading information associated with another road entering the intersection and creating a second alert message for alerting;
The information writing step writes the second alert message in the navigation information storage unit in association with the road.
According to the navigation information creation method defined in the sixth aspect defined in this manner, the same operation as in the second aspect is achieved.

The seventh aspect of the present invention is defined as follows. That is,
In the navigation information creation method defined in the sixth aspect,
The information associated with the other road is sudden braking attention alert information created for the other road.
According to the navigation information creation method defined in the seventh aspect defined in this way, the same operation as in the third aspect is achieved.

The eighth aspect of the present invention is defined as follows. That is,
In the navigation information creation method defined in the sixth or seventh aspect,
The information associated with the other road is traffic regulation information.
According to the navigation information creation method defined in the eighth aspect defined in this manner, the same operation as in the fourth aspect is achieved.

Furthermore, the ninth aspect of the present invention is defined as follows. That is,
A computer program for creating navigation information associated with a road entering an intersection, the computer comprising:
Probe information processing means for extracting and summing up sudden braking history from the probe information stored in the probe information storage unit for the road entering the intersection;
Rapid braking attention alert information creating means for comparing sudden braking history compiled for the road with a predetermined first rule, and creating sudden braking alert information for the road when the first rule is satisfied When,
Read the traffic regulation information about the road to which the sudden braking alert information is given from the traffic regulation information storage unit that stores traffic regulation information, and create a first alert message for alerting Message creation means;
Information writing means for writing the emergency braking warning information and the first warning message to the navigation information storage unit in association with the road;
A computer program characterized by functioning as:
According to the computer program defined in the ninth aspect defined in this way, the same operation as in the first aspect is achieved.

The tenth aspect of the present invention is defined as follows. That is,
In the computer program defined in the ninth aspect, the computer is further
Read information associated with other roads entering the intersection, and function as second alert message creating means for creating a second alert message for alerting,
The information writing means writes the second alert message in the navigation information storage unit in association with the road.
According to the computer program defined in the tenth aspect defined in this way, the same effect as in the second aspect is achieved.

The eleventh aspect of the present invention is defined as follows. That is,
In the computer program defined in the tenth aspect,
The information associated with the other road is sudden braking attention alert information created for the other road.
According to the computer program defined in the eleventh aspect defined in this manner, the same operation as in the third aspect is achieved.

The twelfth aspect of the present invention is defined as follows. That is,
In the computer program defined in the tenth or eleventh aspect,
The information associated with the other road is traffic regulation information.
According to the computer program defined in the twelfth aspect defined in this way, the same effect as in the fourth aspect is achieved.

  A recording medium for recording the computer program defined in the ninth to twelfth aspects is defined as the thirteenth aspect.

It is a block diagram which shows the structure of the navigation information production apparatus of embodiment of this invention. It is a block diagram which similarly shows the structure of a navigation information storage part. It is a block diagram which similarly shows the detailed structure of a probe information processing part. It is a conceptual diagram explaining the identification method of the coordinate of the road which approachs an intersection. The computer system which comprises the navigation information production apparatus of embodiment is shown. It is a flowchart which shows operation | movement of the navigation information production apparatus of embodiment. It is a subflowchart which shows the process of step 17 of FIG. It is a subflowchart which shows the process of step 19 of FIG. It is a block diagram which shows schematic structure of the navigation system using the navigation information produced with the navigation information production apparatus.

A navigation information creating apparatus according to an embodiment of the present invention will be described.
FIG. 1 shows a schematic configuration of a navigation information creation apparatus 1 according to the embodiment.
The navigation information creation device 1 includes a navigation information storage unit 10, a probe information storage unit 20, a probe information processing unit 30, a sudden braking warning information creating unit 50, a first warning message creating unit 60, and a second warning. A message creation unit 80 and a third alert message creation unit 93 are provided.

The navigation information storage unit 10 includes a map information storage unit 11, a road information storage unit 13, a traffic regulation information storage unit 15, and a message storage unit 17.
As shown in FIG. 2, the map information storage unit 11 stores information on road elements for defining the map such as links and nodes, information drawn on the map, and the like. The road information storage unit 13 stores road information that defines the characteristics of each road element such as roads and intersections. The road information includes road width, road type, lane number, and the like. The traffic regulation information is stored in the traffic regulation information storage unit 15. As the traffic regulation information, for example, digital traffic regulation data provided by the Japan Traffic Management Technology Association can be used. All of the traffic regulation information is not necessary, and at least traffic regulation information related to the intersection may be stored. The message storage unit 17 stores various message contents. A flag is set in association with a link or a node, and a message corresponding to the flag is read from the message storage unit 17 and output as image information or audio information from the output unit of the navigation system. In this example, the flag is stored in the road information storage unit as defining the characteristics of links and nodes.

Probe cars P1, P2,... Pm are wirelessly connected to the probe information storage unit 20 via the network N, and all probe information transmitted from each probe car is stored in the probe information storage unit 20.
The method of transmitting the probe information is not limited to the method via the network, but may be temporarily stored in a memory in the probe car and written to the probe information storage unit 20 directly from the memory or via a wire.
The probe information of the probe car includes at least ID information for specifying the probe car, coordinate information, direction information, time information, and other information. Such information can be specified if the vehicle has a position detection function such as GPS. Furthermore, acceleration information corresponding to the sudden braking of the probe car is included. The acceleration information can be specified by an accelerometer.
For example, as described in JP-A-2002-150495, a system that performs bidirectional information transmission between a vehicle navigation system and a base station is well known. Therefore, if the information transmission system is used, a general vehicle equipped with a navigation system can be used as a probe car. Of course, this does not exclude the use of a probe car equipped with a dedicated device for collecting road information.

Probe information corrected by map matching or the like can also be used. Thereby, the error contained in probe information can be reduced.
Here, map matching is a technique for preventing the position of the probe car from deviating from the road of the map information in the navigation system, and as a result, the position of the probe car always exists on the road. In order to perform map matching, a travel locus is formed from the coordinate information, direction information, travel distance, etc. of the probe car in the navigation system, and this travel locus is compared with the road shape data in the map information. Since there are a plurality of road shape data, weighting is performed according to a predetermined priority, and one road is selected. Then, the coordinates of the probe car are changed to the coordinates on the road.
For details, refer to the navigation system (open data structure KIWI and how to use it), Chapter 4, Kyoritsu Publishing, etc.
The map matching may be performed on the base station side that has received the probe information from the probe car.

The probe information processing unit 30 identifies a road entering the intersection, and identifies a history of sudden braking (rapid braking) applied on the road while traveling in the direction of the intersection approach using the probe information.
The probe information processing unit 30 is configured as shown in FIG.
The probe information stored in the probe information storage unit 20 is read out to the probe information reading unit 31 and sent to the probe information sorting unit 33. The probe information sorting unit 33 sorts only the probe information on the road entering the intersection from the sent probe information. Therefore, the intersection approaching road coordinate specifying unit 35 sets an area corresponding to the road entering the intersection, and only probe information having coordinates in the set area is selected.

The coordinates of the road entering the intersection can be specified as follows.
As shown in FIG. 4, coordinate areas C1 to Cn are determined in advance for roads R1 to Rn entering each intersection. The coordinate areas C1 to Cn are in a range of a predetermined distance (20 m in this example) from the entrance to the intersection in the road length direction P. The width direction of the road is matched with the road width.
The intersection approaching road coordinate specifying unit 35 reads an arbitrary node and all links connected to the node from the map information storage unit. First, in order to determine the area of the intersection, the average value Wav of the widths W1 to Wn of each road is calculated as shown in FIG. Then, the half value Wav / 2 of the average value is set as the distance from the node N corresponding to the intersection to the entrance of each road. Therefore, the coordinates along the link corresponding to each road are defined as Wav / 2 to Wav / 2 + P when viewed from the node N.
The coordinates orthogonal to the link are obtained by reading the road width information of the link from the road information storage unit 13 and setting the center of the road width to be centered on the link.
In addition, about the road where the width W is not prescribed | regulated, since it is generally a thin road, the width is set to a fixed value (for example, 10 m).

The probe information sorting unit 33 further sorts the probe information from the direction of the probe information. For example, the probe information existing in the coordinate area C1 is excluded in the direction away from the intersection. Probe information that exists in the coordinate area C1 and that travels in the direction of the intersection is sent to the probe information extraction unit 37.
The coordinate regions C1 to Cn are similarly processed.

  The probe information extraction unit 37 compares the acceleration of the sent probe information with the threshold acceleration Gth. The threshold acceleration Gth is stored in the threshold acceleration storage unit 39. In this example, -0.3G is adopted as the threshold acceleration Gth, and probe information having an acceleration smaller than this value (that is, a large acceleration in the deceleration direction) is extracted. That is, it is considered that sudden braking has occurred for acceleration information having a value smaller than the threshold acceleration Gth.

The number of probe information extracted by the probe information extraction unit 37 is counted by the counter 41. The output of the counter 41 (counter count value) is compared with a predetermined threshold value (threshold counter value) in the comparison unit 43. The threshold value is stored in the threshold counter value storage unit 45.
When the counter count becomes larger than the threshold value, sudden braking has frequently occurred, and therefore a sudden braking attention signal is output from the comparison unit 43 to the sudden braking attention alert creating unit 50.
When the counter count is smaller than the threshold value, the signal from the comparison unit 43 is input to another road identification unit 90.

Upon receiving the sudden braking attention signal, the sudden braking attention calling information creating unit 50 writes and stores the sudden braking attention calling information in the road information storage unit 13. This sudden braking warning information is a flag for reading a warning message.
The sudden braking warning information creating unit 50 also inputs the sudden braking warning information into the first warning message creating unit 60 and the second warning message creating unit 80.

The first warning message creating unit 60 that has received the sudden braking warning information accesses the traffic regulation information storage unit 15 and refers to the traffic regulation information of the road R1 corresponding to the coordinate area C1.
Then, a first alert message is created based on a predetermined rule depending on the presence or absence of traffic regulation information and the type of traffic regulation information, and is stored in the message storage unit 17. That is, for each road determined for the presence or absence of sudden braking, the first alert message is stored in the message storage unit 17 when the requirements for the sudden braking described above are met.

The second alert message creation unit 80 that has received the sudden braking alert information accesses the traffic regulation information storage unit 15 and refers to the traffic regulation information of the road R1 corresponding to the coordinate area C1. Then, a 2-1 alert message is created based on a predetermined rule depending on the presence or absence of traffic regulation information and the type of traffic regulation information, and is stored in the message storage unit 17.
Furthermore, the second warning message creating unit 80 accesses the road information storage unit 13 and refers to the emergency braking warning information associated with other roads entering the intersection. Then, when a sudden braking warning signal is associated with another road, a 2-2 warning message is created and stored in the message storage unit 17.
That is, for each road determined for the presence or absence of sudden braking, when the requirements for sudden braking described above are met, the 2-1 and 2-2 alert messages are stored in the message storage unit 17.

  When the sudden braking is not recognized on the road determined for the presence or absence of the sudden braking, a signal from the probe information processing unit 30 is input to the other road specifying unit 90. The other road specifying unit 90 specifies other roads R2 to Rn connected to the intersection where the road R1 enters. Then, for each of the identified other roads, the third warning message creating unit 93 accesses the road information storage unit 13 and the traffic regulation information storage unit 15 to make a sudden braking warning signal for the other roads. Refers to the presence or absence of traffic control information and its contents. Then, when a sudden braking warning signal is associated with another road, a third warning message is created and stored in the message storage unit 17. At the same time, the third emergency braking alert information as a flag is written in the road information storage unit 13.

  The navigation system that uses the information stored in the navigation information storage unit 10 operates as follows. When an own vehicle is about to enter an intersection where quick braking alert information is associated with any of the entering roads, sudden braking alert information associated with the road (link) or second The warning message associated with the road is read out and output using the sudden braking attention alert information as a flag.

表１において、各メッセージの文言として次の例を採用する。
文言Ａ： 「（この先）、急ブレーキ多発地点です。」
文言Ｂ：
一方の道路のみに急制動注意喚起情報があるとき：
「（この先）、特に○×側からの車両に注意してください。」
複数の道路に急制動注意喚起情報があるとき：
「（この先）、交差車両に十分注意してください。」
文言Ｃ： 「（この先）、交差点に注意してください」
文言Ｄ： 「（この先）、一時停止があります。」 The requirements for creating each alert message are summarized in Table 1.

In Table 1, the following example is adopted as the wording of each message.
Word A: “(Future), it ’s a point of sudden braking”
Word B:
When there is emergency braking alert information on only one road:
"(Future), please pay particular attention to the vehicle from the XX side."
When there is emergency braking alert information on multiple roads:
“(Before), be very careful with crossing vehicles.”
Word C: “(Before), be careful of the intersection”
Word D: “(Future) There will be a pause”

  The example in Table 1 is a case where “pause” is referred to as the content of the traffic regulation information. When the traffic regulation is “crosswalk” or the like, the content is replaced with “pause”. .

In the above example, the first and second warning message creating units 60 and 80 are activated in response to the sudden braking warning information from the sudden braking warning information creating unit 50, and the signal from the probe information processing unit 30 is received. In response, the third alert message creating unit 93 operates to create and save alert messages respectively.
The sudden braking warning information creating unit 50 and the probe information processing unit 30 can be separated from the first to third warning message creating units 60, 80, 93 and can be made independent. In this case, it is determined whether or not sudden braking warning information is associated with all roads entering the intersection. If sudden braking warning information is associated with any road, the relationship shown in Table 1 is followed. Create an alert message.

FIG. 5 is a block diagram showing a hardware configuration of the navigation information creation apparatus 1.
The hardware configuration of the apparatus 1 is such that various elements are coupled to the central controller 121 via the system bus 122 in the same manner as a general computer system.
The central controller 121 includes a general-purpose CPU, a memory controller, a bus controller, an interrupt controller, and a DMA (direct memory access) device. The system bus 122 also includes a data line, an address line, and a control line. A memory circuit including a RAM (Random Access Memory) 123 and a nonvolatile memory (ROM 124, CMOS-RAM 125, etc.) is connected to the system bus 122. The RAM 123 is read or rewritten by the central controller 121 or other hardware elements. The data in the non-volatile memory is read-only, and the data is not lost when the device is turned off. The system program for controlling the hardware is stored in the hard disk device 127 and is also stored in the RAM 123, and is appropriately read into the central control device 121 via the disk drive control device 126 for use. The hard disk device 127 has an area for storing a computer program for operating a general-purpose computer system as the navigation information creation device 1.
A predetermined area of the hard disk device 127 is allocated for the navigation storage unit 10.
Other areas of the hard disk device 127 are allocated for the probe information storage unit 20 and the threshold storage units 39 and 45.

  The system bus 122 is connected to a flexible drive control device 131 that reads and writes data from and to the flexible disk 132 and a CD / DVD control device 133 that reads data from the compact disk 134. In this embodiment, a printer 138 is connected to the printer interface 137.

A keyboard / mouse control device 141 is connected to the system bus 122 to enable data input from the keyboard 142 and the mouse 143. A monitor 145 is connected to the system bus 122 via a monitor control device 144. The monitor 145 can be a CRT type, a liquid crystal type, a plasma display type, or the like.
An empty slot 151 is prepared in order to allow the addition of various elements (such as a modem).

  The system of the embodiment is connected to the network N through the network adapter 161. A probe car is connected to the network (Internet) N.

  Programs (OS program and application program (including those of the present invention)) necessary for operating the navigation information creating apparatus 1 comprising this computer system are installed in the system via various recording media. For example, it is possible to install in the form of a non-write recording medium (CD-ROM, ROM card, etc.), a writable recording medium (FD, DVD, etc.), or a communication medium using the network N. Of course, these programs can be written in the nonvolatile memories 124 and 125 and the hard disk device 127 in advance.

  According to such a computer system, all probe information from the probe car is taken into the system via the network adapter 161 and temporarily stored in a predetermined folder on the hard disk 127.

Hereinafter, the operation of the navigation information creating apparatus 1 of the embodiment will be described (see the flowchart of FIG. 6).
In step 1, first, based on the map information stored in the navigation information storage unit 10, a map is displayed on the display 145, and a region to be processed is specified in units of meshes. For all the intersections included in this area, the intersection approaching road coordinate specifying unit 35 specifies the coordinate area C1 of the intersection approaching road according to the example of FIG.
Next, in step 3, the probe information reading unit 31 reads the probe information from the probe information storage unit 20.

In step 5, the probe information sorting unit 33 extracts those existing in the coordinate area C1 of the intersection approach road from the read probe information, and further narrows down to those whose direction information is directed toward the intersection.
In step 7, the acceleration information of the probe information read by the probe information extraction unit 37 is compared with a threshold acceleration (−0.3G), and the probe has an acceleration equal to or lower than the threshold acceleration (larger on the deceleration side). Extract information.

In step 9, the number of the extracted probe information is measured by the counter 41, and compared with a predetermined threshold value (100 in this example) in the comparison unit 43 (step 11). When the number of probes is equal to or greater than the threshold value, the sudden braking warning information creating unit 50 creates sudden braking warning information and stores it in the road information storage unit 13 in association with the link of the road R1 (step 13). .
Note that Step 7 and Step 9 constitute the first rule defined in the first aspect.

The sudden braking alert information is sent to the first alert message generator 60 and the second alert message generator 80, and step 17 is executed. Details of step 17 are shown in FIG.
In steps 171 and 173, the road R1 corresponding to the coordinate area C1 in which the emergency braking alert information is created is specified. In step 175, the traffic regulation information for the identified road R1 is read from the traffic regulation information storage unit 15. Then, a first alert message is created according to the relationship in Table 1 and stored in the message storage unit 17 (steps 177 and 179).

In step 181, traffic regulation information on other roads (all of R2 to Rn) entering the same intersection is read from the traffic regulation information storage unit 15, and the 2-1 alert is issued in accordance with the relationship shown in Table 1. A message is created and stored in the message storage unit 17 (steps 183 and 185).
In step 187, sudden braking warning information on the other roads (all R2 to Rn) entering the same intersection is read from the road information storage unit 13, and the 2-2nd caution is taken in accordance with the relationship shown in Table 1. A call message is created and stored in the message storage unit 17 (steps 188 and 189).

Returning to FIG. 6, when the number of sudden braking probes is less than the threshold value in step 11, the process proceeds to step 19. Details of step 19 are shown in FIG.
When a signal is input from the comparison unit 43 of the probe information processing unit 30 to the other road specifying unit 90, the other road specifying unit 90 has a road (R1 in this example) where the number of probes for sudden braking does not reach the threshold value. Other roads (R2 to Rn) that enter the intersection to be entered are identified (step 191).
Then, for these other roads (R2 to Rn), the road information storage unit 13 is referred to and it is determined whether or not sudden braking warning information is associated (step 193). Further, with respect to the other road, it is determined whether or not the traffic regulation information is related with reference to the traffic regulation information storage unit 15 (step 195).

When sudden braking warning information and traffic regulation information are associated with the other road, a 3-1 warning message is created in accordance with the relationship shown in Table 1 and stored in the message storage unit 17 ( Steps 197, 199).
When only the emergency braking warning information is associated with the other road, a third warning message is created in accordance with the relationship shown in Table 1 and stored in the message storage unit 17 (step 201, 203).

According to the above example, based on the probe information and the traffic regulation information, a warning message corresponding to the current state can be automatically created for the road entering the intersection.
Since this warning message is created and stored in association with the road for each road entering the intersection, it can be verified as navigation information itself. In other words, it is possible to pick up a road with sudden braking alert information and perform field verification before actually using it in the navigation system. Depending on the results of on-site verification, each alert message can be modified and added.

The information in the navigation information storage unit 10 can be used as it is by the navigation system. An example of the navigation system is shown in FIG.
The navigation system 200 includes a control unit 203, a memory unit 204, an input unit 205, an output unit 206, an interface unit 207, a vehicle position specifying unit 208, a search unit 209, and a navigation information storage unit 10.
The control unit 203 is a computer device including a CPU, a buffer memory, and other devices, and controls other elements constituting the navigation system 200. A computer program is stored in the memory unit 204, and this computer program is read into the control unit 203, which is a computer device, and causes it to function. This computer program can be stored in a general-purpose medium such as a DVD.

The input unit 205 is used for setting a destination and the like. As the input unit 205, a touch panel type input device that cooperates with the display content of the display can be used.
The output unit 206 includes a display, and displays map information and other information necessary for navigation. The output unit 206 can also include a voice guidance device.
The interface unit 207 connects the navigation system 200 to a wireless network or the like.
The own vehicle position specifying unit 208 detects the current position of the user terminal using a GPS device or a gyro device.

The search unit 209 searches for a route from the designated departure point to the destination. When searching for a route, the search unit 209 refers to the information stored in the navigation information storage unit 10.
When the sudden braking warning information or the second rapid braking warning information is attached to the road on the searched route as a flag, the control unit 203 determines that the distance from the vehicle position to the road is a predetermined distance (for example, When it is within 50 m), the alert message associated with the road is read from the message storage unit and output.
Even when the current map is displayed on the display of the output unit 206 of the navigation system 200 without searching for a route, it is possible to perform the same processing as described above for the road on which the host vehicle is traveling.

In the above example, the creation of sudden braking alert information and the alert message are performed by a series of processes, but both can be performed separately.
For example, for all the intersections existing in the map information, the sudden braking history of each road entering them is verified, and the sudden braking alert information is related to the road satisfying a predetermined condition.
Next, an intersection having an approach road associated with the emergency braking alert information is extracted.
At the extracted intersection, the second sudden braking attention alert information is related to another road (a road not associated with the sudden braking alert information).
Next, for each road of the extracted intersection, the first type of caution is referred to with reference to the sudden braking warning information, the second sudden braking warning information and / or traffic regulation information attached to each road itself. Create a reminder message. In addition, for each road, reference is made to its own sudden braking warning information, second sudden braking warning information and / or traffic regulation information, and sudden braking warning information attached to other roads, second The second type of warning message is created with reference to the sudden braking warning information and / or traffic regulation information.

The following matters are disclosed below.
A navigation information creation method for creating information associated with a road entering an intersection in navigation information used for a navigation system,
When the emergency braking alert information is associated with any of the roads entering the intersection, the emergency braking alert information associated with each of the roads entering the intersection is associated with the second emergency braking alert. A navigation information creating method, characterized in that an alert message is created with reference to information and / or traffic regulation information, and the alert message is stored in association with the road.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1 Navigation information preparation apparatus 10 Navigation information storage part 11 Map information storage part 13 Road information storage part 15 Traffic regulation information storage part 17 Message storage part 20 Probe information storage part 30 Probe information processing part 50 Sudden braking attention alert information preparation part 60, 80, 93 Alert message creation part

Claims (7)

In the navigation information used in the navigation system, a navigation information creation device for creating information associated with a road entering an intersection,
A probe information storage unit for storing probe information;
A traffic regulation information storage unit for storing traffic regulation information;
Based on a first rule, a probe information processing unit that extracts and processes a sudden braking history from the probe information for a road entering the intersection;
Based on the processing result of the probe information processing unit, a sudden braking attention alert information creating unit that creates sudden braking alert information about the road;
A traffic regulation information related to the road to which the sudden braking warning information is given is read out from the traffic regulation information storage unit, and is a message reflecting the contents of the traffic regulation information , the first warning call for alerting A first alert message creation unit for creating a message;
An information writing unit that writes the sudden braking warning information and the first warning message to the navigation information storage unit in association with the road;
A navigation information creating apparatus characterized by comprising: A second warning message creating unit that reads out sudden braking warning information created for other roads entering the intersection and creates a second warning message for alerting;
The navigation information creating apparatus according to claim 1, wherein the information writing unit writes the second alert message in the navigation information storage unit in association with the road. A navigation information creation method for creating information associated with a road entering an intersection in navigation information used for a navigation system,
Based on the first rule, for a road entering the intersection, a probe information processing step for extracting and summing up a sudden braking history from the probe information stored in the probe information storage unit;
Based on the processing result of the probe information processing unit, a sudden braking attention alert information creating step for creating sudden braking attention alert information about the road;
It is a message reflecting the content of the traffic regulation information, which is read out from the traffic regulation information storage unit that saves the traffic regulation information, with respect to the road to which the sudden braking warning information is given, and for alerting A first alert message creating step for creating a first alert message;
An information writing step of writing the quick braking warning information and the first warning message to the navigation information storage unit in association with the road;
A navigation information creating method characterized by comprising: A second alert message creating step of reading out the sudden braking alert information created for other roads entering the intersection and creating a second alert message for alerting;
The navigation information creating method according to claim 3 , wherein the information writing step writes the second alert message in the navigation information storage unit in association with the road. A computer program for creating navigation information associated with a road entering an intersection, the computer comprising:
Probe information processing means for extracting and summing up the sudden braking history from the probe information stored in the probe information storage unit for the road entering the intersection based on the first rule ;
Based on the processing result of the probe information processing unit, sudden braking warning information creating means for creating sudden braking warning information about the road;
It is a message reflecting the content of the traffic regulation information, which is read out from the traffic regulation information storage unit that saves the traffic regulation information, with respect to the road to which the sudden braking warning information is given, and for alerting A first alert message creating means for creating a first alert message;
Information writing means for writing the emergency braking warning information and the first warning message to the navigation information storage unit in association with the road;
A computer program characterized by functioning as: Said computer further
Read out sudden braking warning information created for other roads entering the intersection, and function as a second warning message creating means for creating a second warning message for alerting,
6. The computer program according to claim 5 , wherein the information writing unit writes the second alert message in the navigation information storage unit in association with the road. A recording medium for recording the computer program according to claim 5 .

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