JP2009009281A - Traffic accident prevention system, server device, and traffic accident prevention method - Google Patents

Abstract

An object of the present invention is to prevent a traffic accident from occurring while taking into account the current pedestrian and vehicle conditions.
A mobile terminal 1 for detecting position information of the own device, an in-vehicle device 3 mounted on a vehicle for detecting position information of the own device, and the mobile terminal 1 and the in-vehicle device by wide-area communication via a mobile communication network 2 In the traffic accident prevention system, the server device 4 includes a server device 4 that determines a risk level indicating a possibility that the pedestrian carrying the mobile terminal 1 and the vehicle may encounter an accident based on the position information transmitted from the server 3. Determines the risk level of a pedestrian and a vehicle approaching each other from the position information of the mobile terminal 1 and the in-vehicle device 3, notifies the mobile device 1 and the in-vehicle device 3 of the risk level, and carries it according to the risk level. Communication is performed between the terminal 1 and the in-vehicle device 3 by direct communication.
[Selection] Figure 1

Description

  The present invention relates to a traffic accident prevention system, a server device, and a traffic accident prevention method, and more particularly to a traffic accident prevention system and a server device that prevent a traffic accident beforehand using a mobile terminal and an in-vehicle device typified by a car navigation system. And a traffic accident prevention method.

In recent years, in-vehicle devices have been equipped not only with car navigation systems that perform the original navigation function, but also with other vehicles, pedestrians and other mobile objects, and communication with roadside devices represented by optical beacons and ETC. ing. On the other hand, traffic accidents at specific points within a geographical area based on accident information such as the scale, location, date of occurrence, etc. There has been proposed a traffic accident occurrence prediction system that obtains a digitized risk level and outputs the risk level to an external system (see, for example, Patent Document 1). According to this traffic accident occurrence prediction system, it is possible to provide the degree of danger at a predetermined point and reduce the number of traffic accidents at that point.
JP 2006-277165 A

  However, in the conventional traffic accident occurrence prediction system as described above, since the degree of danger is predicted from accident information indicating the actual occurrence of traffic accidents and the actual values of weather elements, Since vehicle position information and operation information cannot be specified, there is a problem that a traffic accident cannot be prevented while considering the current pedestrian and vehicle conditions.

  The present invention has been made in view of such a problem, and provides a traffic accident prevention system, a server device, and a traffic accident prevention method capable of preventing the occurrence of a traffic accident while considering the current pedestrian and vehicle conditions. The purpose is to provide.

  The traffic accident prevention system according to the present invention includes a portable terminal device that detects position information of its own device, an in-vehicle device that is mounted on a vehicle and detects position information of the own device, and the portable terminal by wide-area communication via a mobile communication network. A pedestrian carrying the portable terminal device based on position information transmitted from the device and the vehicle-mounted device, and a server device for determining a risk level indicating a possibility that the vehicle will encounter an accident, the server device comprising: The risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal device and the in-vehicle device, and the risk level is notified to the mobile terminal device and the in-vehicle device, and according to the risk level. Communication is performed between the portable terminal device and the in-vehicle device by direct communication.

  According to this configuration, the risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal device and the in-vehicle device, and the risk level is notified to the mobile terminal device and the in-vehicle device. Since it is possible to notify the degree of danger according to the approaching state based on the position information, it is possible to prevent the occurrence of a traffic accident while considering the current pedestrian and vehicle conditions. Moreover, since communication is performed by direct communication between the mobile terminal device and the in-vehicle device according to the determined risk level, for example, communication that reflects the current state of the pedestrian and the vehicle is performed using direct communication. Therefore, it is possible to perform the process more quickly than in the case of performing the process for avoiding the accident using the wide area communication.

  In the traffic accident prevention system of the present invention, while the mobile terminal device detects the pedestrian's motion information, the vehicle device detects the vehicle motion information, and the server device includes the mobile terminal device and the vehicle device. It is preferable to specify a range in which the degree of risk is determined according to the position information and the pedestrian and vehicle operation information. In this case, since the range for judging the degree of risk can be enlarged or reduced according to the position information of the mobile terminal device and the vehicle-mounted device and the operation information of the pedestrian and the vehicle, the current pedestrian and the vehicle It is possible to appropriately determine the degree of risk according to the state (approaching state or operating state). As a result, it is possible to prevent a traffic accident from occurring.

  Further, in the traffic accident prevention system of the present invention, the server device manages typographic information obtained by typifying various information in a predesignated area, and the server device has an area corresponding to the position information of the mobile terminal device and the in-vehicle device. It is preferable to specify a range in which the degree of risk is determined according to the type information. In this case, the range for determining the degree of risk can be expanded or reduced according to the typographical information associated with each area, so the current pedestrian and vehicle surrounding conditions (weather, time zone, It is possible to appropriately determine the degree of risk according to the surrounding facilities. As a result, it is possible to prevent a traffic accident from occurring.

  For example, in the traffic accident prevention system of the present invention, the server device manages at least one of weather information, time zone information, and facility information in a predesignated area as the categorized information, and the portable terminal device and A range for determining the degree of risk is specified according to the weather information, time zone information, and facility information in an area corresponding to the position information of the in-vehicle device. In this case, the range for determining the degree of danger can be enlarged or reduced according to the weather information, time zone information, and facility information of each area, so the visibility according to the weather and the time zone It is possible to appropriately determine the degree of risk according to the traffic volume, the state of the user of a specific facility, and the like. As a result, it is possible to prevent a traffic accident from occurring.

  In the traffic accident prevention system of the present invention, the server device manages management target information according to the facility information and coefficient information that increases or decreases the risk level according to the management target information as the type information. It is preferable that the degree of risk is determined according to the management target information and coefficient information corresponding to identification information of the mobile terminal device and the in-vehicle device. In this case, for example, the risk level of the management target (for example, the facility user) related to the facility can be increased or decreased based on the position information of the mobile terminal device and the in-vehicle device. It is possible to appropriately determine the degree. As a result, it is possible to prevent a traffic accident from occurring.

  Moreover, the traffic accident prevention system of this invention WHEREIN: It is preferable that the said server apparatus transmits the message which alerts according to the said risk to the said portable terminal device and vehicle equipment. In this case, it is possible to alert the pedestrian and the vehicle driver according to the degree of risk.

  In the traffic accident prevention system according to the present invention, it is preferable that the server device performs communication by direct communication between the mobile terminal device having the highest degree of risk and the in-vehicle device. In this case, it is possible to perform processing for avoiding a traffic accident using direct communication between the mobile terminal device and the in-vehicle device that are most likely to encounter a traffic accident. As a result, it is possible to prevent a traffic accident from occurring.

  In the traffic accident prevention system according to the present invention, the server device may cause direct communication between the mobile terminal device and the in-vehicle device, the risk level of which is higher than a predetermined threshold. good. In this case, it is possible to perform processing for avoiding the traffic accident using direct communication between the mobile terminal device and the in-vehicle device that are highly likely to encounter a traffic accident. As a result, it is possible to prevent a traffic accident from occurring.

  The server device of the present invention is a server device that is connected to a mobile terminal device that detects position information of its own device and a vehicle-mounted device that is mounted on a vehicle and detects position information of its own device via a mobile communication network, Based on position information transmitted from the mobile terminal device and the vehicle-mounted device in wide area communication via a mobile communication network, a risk level indicating a possibility that the pedestrian carrying the mobile terminal device and the vehicle may encounter an accident is determined. The pedestrian and the vehicle approaching each other are determined from position information of the mobile terminal device and the in-vehicle device, and the risk level is given to the mobile terminal device and the in-vehicle device corresponding to the pedestrian and the vehicle. A risk level notification unit for notification and a direct communication instruction unit for performing communication by direct communication between the mobile terminal device and the in-vehicle device according to the risk level are provided.

  According to this configuration, the risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal device and the in-vehicle device, and the risk level is notified to the mobile terminal device and the in-vehicle device. Since it is possible to notify the degree of danger according to the approaching state based on the position information, it is possible to prevent the occurrence of a traffic accident while considering the current pedestrian and vehicle conditions. Moreover, since communication is performed by direct communication between the mobile terminal device and the in-vehicle device according to the determined risk level, for example, communication that reflects the current state of the pedestrian and the vehicle is performed using direct communication. Therefore, it is possible to perform the process more quickly than in the case of performing the process for avoiding the accident using the wide area communication.

  The traffic accident prevention method of the present invention includes a mobile terminal device that detects position information of its own device, and a traffic accident in a server device that is mounted on a vehicle and connected to an in-vehicle device that detects position information of its own device via a mobile communication network. It is a prevention method, and a pedestrian carrying the portable terminal device and the vehicle may encounter an accident based on position information transmitted from the portable terminal device and the vehicle-mounted device in wide-area communication via the mobile communication network Determining the pedestrian and vehicle approaching each other from the position information of the portable terminal device and the in-vehicle device, and determining the risk level indicating the sex to the portable terminal device and the in-vehicle device corresponding to the pedestrian and the vehicle A step of notifying the degree of risk, and a step of performing communication by direct communication between the portable terminal device and the in-vehicle device according to the degree of risk. .

  According to this method, the risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal device and the in-vehicle device, and the risk level is notified to the mobile terminal device and the in-vehicle device. Since it is possible to notify the degree of danger according to the approaching state based on the position information, it is possible to prevent the occurrence of a traffic accident while considering the current pedestrian and vehicle conditions. Moreover, since communication is performed by direct communication between the mobile terminal device and the in-vehicle device according to the determined risk level, for example, communication that reflects the current state of the pedestrian and the vehicle is performed using direct communication. Therefore, it is possible to perform the process more quickly than in the case of performing the process for avoiding the accident using the wide area communication.

  According to the traffic accident prevention system, the server device, and the traffic accident prevention method according to the present invention, the risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal device and the in-vehicle device, and the risk level is determined as the mobile terminal device. In addition to notifying the vehicle-mounted device and communicating with the mobile terminal device and the vehicle-mounted device directly according to the degree of risk, depending on the approach state based on the position information of the pedestrian and the vehicle While notifying the degree of danger, communication that reflects the current state of pedestrians and vehicles can be performed using direct communication, thus preventing the occurrence of traffic accidents while considering the current state of pedestrians and vehicles It becomes possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a schematic configuration for explaining a traffic accident prevention system according to an embodiment of the present invention. The traffic accident prevention system shown in FIG. 1 mainly includes a mobile terminal 1, a vehicle equipped with an in-vehicle device 3, and a server device 4 connected to the mobile terminal 1 and the in-vehicle device 3 via a mobile communication network 2. Has been.

  The mobile terminal 1 is equipped with a GPS (Global Positioning System), can measure the position of its own device by GPS, and transmits position information to the server device 4. The mobile terminal 1 is equipped with a wireless LAN, and can directly communicate (direct communication) with the in-vehicle device 3 or the like. When performing direct communication with the in-vehicle device 3, parameters (IP address of the in-vehicle device 3, a communication channel in the wireless LAN and an SSID that is an identifier of an access point) for direct communication transmitted from the server device 4 are set. Use. Further, the mobile terminal 1 has an operating system (mobile device OS), and a browser function, a viewer function, a JAM (Java (registered trademark) Application Manager) and other functions operate on the mobile device OS.

  In addition, the mobile terminal 1 transmits information about a pedestrian carrying the mobile terminal 1 (hereinafter referred to as “pedestrian information”) to the server device 4. The position information is included in the pedestrian information. Information included in the pedestrian information will be described later. In addition, the mobile terminal 1 receives the risk notification message transmitted from the server device 4 and displays this risk notification message. The contents of the risk notification message will be described later.

  The mobile communication network 2 is a network between the mobile terminal 1 and the in-vehicle device 3 and the server device 4. The mobile communication network 2 includes a mobile packet communication network in addition to a normal mobile communication network. Wide area communication is performed between the mobile terminal 1 and the in-vehicle device 3 and the server device 4. On the other hand, direct communication is performed between the mobile terminal 1 and the in-vehicle device 3.

  The in-vehicle device 3 is equipped with a GPS, can measure the position of the own device by the GPS, and transmits the position information to the server device 4. The in-vehicle device 3 transmits information related to the vehicle on which the in-vehicle device 3 is mounted (hereinafter referred to as “vehicle information”) to the server device 4. The vehicle information includes the position information. Information included in the vehicle information will be described later. Furthermore, the in-vehicle device 3 is equipped with a wireless LAN, and can directly communicate with the mobile terminal 1 or the like. When performing direct communication with the mobile terminal 1, parameters (IP address of the mobile terminal 1, a communication channel in the wireless LAN and an SSID that is an identifier of an access point) for direct communication transmitted from the server device 4 are set. Use. Furthermore, the in-vehicle device 3 receives the risk notification message transmitted from the server device 4 and displays the risk notification message.

  The server device 4 stores the pedestrian information of the mobile terminal 1 that provides the service in the present system, the vehicle information of the in-vehicle device 3 that provides the service, and the information on the weather, time zone, and surrounding facilities in a preset area. Based on the type information included, an area for determining the risk level of a pedestrian or a vehicle (hereinafter referred to as “risk level determination area”) and a target terminal for determining the risk level (hereinafter referred to as “risk level determination”). Terminal ”), and the risk level of the pedestrian and the vehicle corresponding to the risk level determination terminal is determined. In addition, a danger degree shall mean the degree which shows the high possibility that the pedestrian who carries the portable terminal 1 and the vehicle by which the vehicle-mounted apparatus 3 is mounted will encounter an accident. And the danger notification message according to the judged risk is transmitted with respect to the portable terminal 1 and the vehicle-mounted apparatus 3 which are the said risk determination terminals. In addition, the server device 4 instructs the mobile terminal 1 and the vehicle-mounted device 3 that are the highest risk determination terminal to start direct communication in order to avoid a traffic accident, and switches from wide area communication to direct communication. Let

  In this way, since the risk notification message according to the risk determined based on the pedestrian information and the vehicle information and the type information is transmitted to the mobile terminal 1 and / or the vehicle-mounted device 3 approaching each other, It is possible to prevent the occurrence of traffic accidents while taking into account the current pedestrian and vehicle conditions and surrounding conditions. Since communication is performed by switching from wide area communication to high-speed direct communication between the mobile terminal 1 of the pedestrian having the highest degree of danger and the in-vehicle device 3 of the vehicle, traffic preferentially between these terminals. It is possible to execute processing for avoiding an accident.

  FIG. 2 is a block diagram showing a schematic configuration of the mobile terminal 1 shown in FIG. Note that the configuration shown in FIG. 2 is simplified for the purpose of describing the present invention, and is assumed to include components mounted on a normal mobile terminal.

  The mobile terminal 1 includes a control unit 11 that controls the entire apparatus, a communication control unit 12 that communicates with the server device 4 via the mobile communication network 2, an input unit 13 that receives various data inputs, Display unit 14 for displaying data and position information, GPS device 15 for positioning the own device, application control unit 16 for starting various applications installed in the device or downloaded, and portable terminal 1 It mainly includes a 3D sensor 17 that detects the movement of a portable pedestrian and a P2P communication control unit 18 that directly communicates with other terminal devices (particularly, the in-vehicle device 3) through P2P wireless communication.

  The communication control unit 12 transmits pedestrian information of a pedestrian carrying the own device to the server device 4. This pedestrian information includes position information of the own device, identification information for identifying the own device, and operation information indicating the operation of the pedestrian. For example, all information on the pedestrian information is transmitted at a timing at which the position information is transmitted to the server device 4. However, the information is not limited to this, and may be transmitted at a different timing as appropriate. For example, you may make it transmit to the server apparatus 4 at the time of detecting the operation | movement of a pedestrian with the portable terminal 1. FIG. Further, the communication control unit 12 receives a risk notification message transmitted from the server device 4. The display unit 14 displays this risk notification message. For example, the display unit 14 preferably changes the display mode (for example, the light emission mode or the voice output mode) of the message according to the risk level corresponding to the risk level notification message.

  The GPS device 15 detects the current position (latitude, longitude) of the mobile terminal 1 with a predetermined accuracy using a GPS satellite (not shown). The GPS device 15 outputs the measured position information to the display unit 14. The application control unit 16 activates a risk management application installed in the device or downloaded. The risk management application for the portable terminal 1 is an application that transmits pedestrian information to the server device 4 at a predetermined timing and displays a risk notification message transmitted from the server device 4. In addition, this is an application for performing P2P wireless communication with the in-vehicle device 3 when receiving a direct communication start instruction from the server device 4.

  The 3D sensor 17 is configured by combining, for example, a gyro sensor, an acceleration sensor, and a magnetic sensor, and detects an action of a pedestrian carrying the mobile terminal 1. For example, pedestrian travel speed, acceleration or deceleration, and presence / absence of a pause are detected. These pieces of information are transmitted to the server device 4 as operation information included in the pedestrian information. The operation detected by the 3D sensor 17 shown here is an example, and is not limited to this, and can be changed as appropriate. The P2P communication control unit 18 performs P2P wireless communication with the in-vehicle device 3 included in the direct communication start instruction received from the server device 4.

  FIG. 3 is a block diagram showing a schematic configuration of the in-vehicle device 3 shown in FIG. Note that the configuration shown in FIG. 3 is simplified for the purpose of describing the present invention, and it is assumed that the components mounted on a normal vehicle-mounted device are provided. The in-vehicle device 3 includes a car navigation system and a communication device.

  The in-vehicle device 3 includes a control unit 31 that controls the entire device, a communication control unit 32 that communicates with the server device 4 via the mobile communication network 2, and a display unit 33 that displays various data and information. , A GPS device 34 that measures the position of the device itself, an application control unit 35 that activates various applications that are mounted on or downloaded to the device, and a 3D sensor 36 that detects the operation of the vehicle on which the in-vehicle device 3 is mounted. The P2P communication control unit 37 communicates directly with other terminal devices (particularly, the mobile terminal 1) by P2P wireless communication.

  The communication control unit 32 transmits the vehicle information of the vehicle on which the own device is mounted to the server device 4. The vehicle information includes position information of the own device, identification information for identifying the own device, and operation information indicating the operation of the vehicle. For example, all the vehicle information is transmitted at the timing when the position information is transmitted to the server device 4. However, the vehicle information is not limited to this, and may be transmitted at different timings as appropriate. For example, you may make it transmit to the server apparatus 4 at the time of detecting the operation | movement of a vehicle with the vehicle-mounted apparatus 3. FIG. In addition, the communication control unit 32 receives a risk notification message transmitted from the server device 4. The display unit 33 displays this risk notification message. For example, it is preferable that the display unit 33 changes the display mode (for example, the light emission mode or the voice output mode) of the message according to the risk level corresponding to the risk level notification message.

  The GPS device 34 detects the current position (latitude, longitude) of the in-vehicle device 3 with a predetermined accuracy using a GPS satellite (not shown). The application control unit 35 activates a risk management application installed in the device or downloaded. The risk management application for the in-vehicle device 3 is an application that transmits vehicle information to the server device 4 at a predetermined timing and displays a risk notification message transmitted from the server device 4. In addition, this is an application that performs P2P wireless communication with the corresponding mobile terminal 1 when a direct communication start instruction is received from the server device 4.

  The 3D sensor 36 is configured by combining, for example, a gyro sensor, an acceleration sensor, and a magnetic sensor, and detects the operation of the vehicle on which the in-vehicle device 3 is mounted. For example, the vehicle speed, acceleration or deceleration, and the presence / absence of a temporary stop are detected. These pieces of information are transmitted to the server device 4 as operation information included in the vehicle information. The operation detected by the 3D sensor 36 shown here is an example, and is not limited to this, and can be changed as appropriate. The P2P communication control unit 37 performs P2P wireless communication with the mobile terminal 1 included in the direct communication start instruction received from the server device 4.

  FIG. 4 is a block diagram showing a schematic configuration of the server device 4 shown in FIG. The configuration shown in FIG. 4 is simplified for explaining the present invention, and it is assumed that the components mounted on the normal server device are provided.

  The server device 4 is used to determine the degree of risk, a control unit 41 that controls the entire device, a communication control unit 42 that communicates with the mobile terminal 1 and the in-vehicle device 3 via the mobile communication network 2. A type information database (DB) 43 in which type information to be registered is registered, and a pedestrian information database (DB) 44 in which information (current information) indicating the current state of a pedestrian carrying the mobile terminal 1 is registered , A vehicle information database (DB) 45 in which information indicating the current state of the vehicle on which the in-vehicle device 3 is mounted (current information) is registered, and application control that activates various applications that are mounted on the device or downloaded. It is mainly comprised from the part 46. FIG.

  The communication control unit 42 receives pedestrian information of the mobile terminal 1 and vehicle information of the in-vehicle device 3. Further, a risk notification message corresponding to the risk is transmitted to the mobile terminal 1 and the vehicle-mounted device 3 which are risk determination terminals described later. Furthermore, a signal instructing the start of direct communication between the two is transmitted to the portable terminal 1 and the in-vehicle device 3 which are the highest risk determination terminals.

  The type information DB 43 is a database in which type information used for risk determination is registered. The type information DB 43 has a management table as shown in FIG. In the management table shown in FIG. 5, corresponding to the area information 51 specified by the preset latitude and longitude, the weather information 52, the time zone information 53, the facility information 54, the management target information 55 of the area, Coefficient information 56 for increasing or decreasing the degree of risk is registered. Note that the management items and management methods in the management table shown in FIG. 5 are not limited to this, and can be implemented with appropriate changes.

  For example, in the classification information of No. 1 shown in FIG. 5, in correspondence with the area information 51 specified by the latitudes “XXX-ΔΔΔ” and longitudes “XXX- □□□”, “ Sunny weather information 52, “7:00 to 9:00” time zone information 53, facility information 54 indicating that “elementary school” exists, and management target information 55 indicating that “primary schoolchild” is a management target In addition, coefficient information 56 in which a coefficient “2.0” is assigned to a management target and a coefficient “1.0” is assigned to a non-management target is registered. This means that the risk is increased by a factor of 2.0 when elementary school students are traveling from 7:00 to 9:00 on a clear day in the area, while the risk is greater when non-elementary students are traveling. Is 1.0 times (as it is). In addition, the coefficient information 56 (managed object) of the No. 2 type information is lower than the No. 1 type information, because the No. 1 type information takes the school attendance time into consideration. On the other hand, the categorization information of No. 2 does not consider school attendance time.

  Similarly, in the categorization information of No. 21 shown in FIG. 5, corresponding to the area information 51 specified by the latitudes “ΔΔΔ˜ □□□” and the longitudes “XXX”, "Sunny" weather information 52, "10:00 to 17:00" time zone information 53, facility information 54 indicating that "retirement home" exists, management target indicating that "old man" is a management target Information 55 and coefficient information 56 in which a coefficient “2.0” is assigned to a management target and coefficient “1.0” is assigned to a non-management target are registered. This means that the risk is increased by a factor of 2.0 if an elderly person is passing between 10:00 and 17:00 on a clear day in the area, while the risk is assigned if a person other than the elderly person is passing. Is 1.0 times (as it is). The coefficient information 56 of the classification information of No. 22 is higher than that of the classification information of No. 21 whereas the classification information of No. 21 takes into account visibility in fine weather. This is because the classification information of No. 22 considers visibility in rainy weather.

  The pedestrian information DB 44 is a database in which current status information of pedestrians who carry the mobile terminal 1 is registered. The pedestrian information DB 44 has a management table as shown in FIG. In the management table shown in FIG. 6, identification information 61 of the mobile terminal 1, gender information 62 indicating the sex of the pedestrian carrying the mobile terminal 1, age information 63 indicating the age of the pedestrian, and an operation indicating the pedestrian's operation. Information 64, movement speed information 65 indicating the movement speed when the pedestrian is moving, and position information 64 of the portable terminal 1 are registered. 6 shows the case where the telephone number assigned to the mobile terminal 1 is used for the identification information 61, the identification information 61 is not limited to this and can be changed as appropriate. . For example, the manufacturing number of the mobile terminal 1 may be used.

  Among these pieces of information, the identification information 61, gender information 62, and age information 63 are specified based on information specified at the time of contracting the mobile terminal 1 or the like. The motion information 64 and the position information 66 are specified based on pedestrian information transmitted from the mobile terminal 1. Although FIG. 6 shows a case where only whether or not moving is registered as the operation information 64, the present invention is not limited to this and can be changed as appropriate. The moving speed information 65 is specified based on the registered contents of the operation information 64 and the position information 66. In the present embodiment, the moving speed information 65 is calculated from the change in the position information 66 over a certain period. At this time, the moving direction of the pedestrian is also specified.

  For example, in the current status information of No. 1 pedestrian shown in FIG. 6, the “male” sex information 62 and “10 years old” are associated with the identification information 61 specified by “090-AAAAA-AAA”. Age information 63, motion information 64 indicating “moving”, moving speed information 65 indicating that the moving speed is “5 km”, and longitude “OO” and latitude “ΔΔΔ” ”Is registered. This indicates that a 10-year-old man carrying the mobile terminal 1 whose phone number is 090-AAAA-AAA is moving between the positions of longitude OO and latitude △△△ at a speed of 5 km / h. .

  The vehicle information DB 45 is a database in which current status information of a vehicle on which the in-vehicle device 3 is mounted is registered. The vehicle information DB 45 has a management table as shown in FIG. In the management table shown in FIG. 7, the identification information 71 of the in-vehicle device 3, gender information 72 indicating the gender of the owner of the vehicle on which the in-vehicle device 3 is mounted, age information 73 indicating the age of the owner, and the operation of the vehicle , Movement speed information 75 indicating the movement speed when the vehicle is moving, and position information 74 of the in-vehicle device 3 (vehicle) are registered. 7 shows the case where the telephone number assigned to the in-vehicle device 3 is used for the identification information 71, the identification information 71 is not limited to this, and can be changed as appropriate. . For example, the serial number of the in-vehicle device 3 may be used.

  Among these pieces of information, the identification information 71, gender information 72, and age information 73 are based on information specified at the time of purchasing the vehicle (the vehicle-mounted device 3 is already fixed) or when the vehicle-mounted device 3 is purchased. Identified. The operation information 74 and the position information 76 are specified based on the vehicle information transmitted from the in-vehicle device 3. Although FIG. 7 shows a case where only whether or not moving is registered as the operation information 74, the present invention is not limited to this and can be appropriately changed. The moving speed information 75 is specified based on the registered contents of the operation information 74 and the position information 76. In the present embodiment, the movement speed information 75 is calculated from the change in the position information 76 over a certain period. At this time, the moving direction of the vehicle is also specified at the same time.

  For example, in the current status information of the vehicle No. 2 shown in FIG. 7, the sex information 72 of “male” and the age of “39 years old” correspond to the identification information 71 specified by “090-OOOO-OOOO”. Information 73, operation information 74 indicating “moving”, moving speed information 75 indicating that the moving speed is “50 km”, and longitude “xxx” and latitude “xxx” The position information 76 specified by is registered. This is because a vehicle equipped with the in-vehicle device 3 whose telephone number is 090-OOOO-OOOO is moving at a position of longitude XXX and latitude XXX at a speed of 50 km / h by a 39-year-old man driving It shows that.

  The application control unit 46 activates a risk management application installed in the device or downloaded. The risk management application for the server device 4 includes pedestrian current information registered in the pedestrian information DB 44, vehicle current information registered in the vehicle information DB 45, and type information registered in the type information DB 43. The risk determination area is specified based on the above, the risk determination terminal is specified, and the risk of the pedestrian and the vehicle corresponding to the risk determination terminal is determined. That is, this risk management application functions as a risk determination unit. Specifically, the current information on the pedestrian and the vehicle is updated based on the identification information, the position information, and the operation information included in the pedestrian information and the vehicle information, and the contents of the updated current information (for example, the moving speed) The risk determination area is specified from the information 65 and 75) and the contents of categorized information (for example, the weather information 52 and the time zone information 53) according to the contents such as weather information and time information acquired separately. Then, the risk determination terminal is specified based on the contents (for example, position information 66 and 76) of the updated pedestrian and vehicle current state information and the region (distance) of the risk determination area. Further, the content of the updated pedestrian and vehicle current status information (for example, age information 63 and 73 and position information 66 and 77) and the corresponding typed information content (for example, management target information 55 and coefficient information) 56), the risk level of the pedestrian and the vehicle corresponding to the risk level determination terminal is determined.

  The risk management application for the server device 4 is an application that transmits a risk notification message corresponding to the determined risk to the mobile terminal 1 and the vehicle-mounted device 3 that are the risk determination terminals. That is, this risk management application functions as a risk notification unit. Further, the risk management application for the server device 4 is an application that instructs the mobile terminal 1 and the vehicle-mounted device 3 that are the risk determination terminals with the highest risk level to start direct communication. That is, this risk management application functions as a direct communication instruction unit.

  Next, the operation in the traffic accident prevention system according to the present embodiment will be described with reference to FIG. FIG. 8 is a sequence diagram for explaining the operation in the traffic accident prevention system according to the present embodiment.

  In the traffic accident prevention system of the present invention, the server device 4 is based on the pedestrian information from the mobile terminal 1, the vehicle information from the in-vehicle device 3, and the type information registered in the type information DB 43. A determination area is specified, a risk determination terminal is specified, and the risk of pedestrians and vehicles corresponding to the risk determination terminal is determined. And the danger notification message according to the judged risk is transmitted with respect to the portable terminal 1 and the vehicle-mounted apparatus 3 which are the said risk determination terminals. Furthermore, direct communication is instructed to the portable terminal 1 and the in-vehicle device 3 which are the risk determination terminals having the highest risk, and direct communication at a higher speed than the wide area communication between both is realized.

  In the following, in the mobile terminal 1, the in-vehicle device 3, and the server device 4, it is assumed that the risk management application is activated in the application control unit 16, the application control unit 35, and the application control unit 46, respectively. The operation will be described. In addition, it is assumed that a management table having the contents shown in FIG. 5 is registered in the type information DB 43 of the server device 4. In the server device 4, it is assumed that the current time information is grasped and the current weather information of each area managed by the categorized information DB 43 is grasped.

  In the traffic accident prevention system according to the present embodiment, portable terminal 1 transmits pedestrian information to server device 4 (ST81). This pedestrian information includes identification information, position information, and operation information. On the other hand, the in-vehicle device 3 transmits vehicle information to the server device 4 (ST82). This vehicle information includes identification information, position information, and operation information. In addition, the transmission timing of the pedestrian information from the portable terminal 1 and the vehicle information from the in-vehicle device 3 is the operation information of the pedestrian or the driver, the accident occurrence record of the current position of the portable terminal 1 and the in-vehicle device 3, or the like. It is changed appropriately based on Upon receiving these pedestrian information and vehicle information, the server device 4 updates the pedestrian current status information in the pedestrian information DB 44 and the vehicle current status information in the vehicle information DB 45 (ST83, ST84). Here, it is assumed that the current state information of the pedestrian and the vehicle shown in FIGS. 6 and 7 is registered in the pedestrian information DB 44 and the vehicle information DB 45.

  In addition, although the case where update of pedestrian information DB44 and vehicle information DB45 is performed after receiving pedestrian information and vehicle information is shown here, reception timing of pedestrian information and vehicle information and pedestrians are shown. The update timing of the information DB 44 and the vehicle information DB 45 is not limited to this, and can be changed as appropriate. For example, the pedestrian information DB 44 may be updated after receiving pedestrian information from the mobile terminal 1, while the vehicle information DB 45 may be updated after receiving vehicle information from the in-vehicle device 3.

  Then, a risk determination area (determination area) is specified (ST85). In this case, the risk determination area includes the movement speed information 65 and movement speed information 75, the current time information and weather information, the position information 66, and the position information 76 included in the updated pedestrian and vehicle current information. Is specified based on the weather information 52 and the time zone information 53 corresponding to the area information 51 corresponding to.

  For example, when the moving speed information 65 of the pedestrian is 5 km or more, an area of 30 m from the current position information is specified as the risk determination area. Further, when the vehicle moving speed information 75 is 40 km or more, a range of 500 m within a certain angle range from the current position information toward the traveling direction is specified as the risk determination area. These take into account the movement distance according to the movement speed of the pedestrian and the vehicle. For example, when the weather information 52 in the categorized information is rain, the range of the risk determination area specified in this way is multiplied by 1.2. Furthermore, when the time zone information 53 in the categorized information includes a time after 18:00, the range of the risk determination area specified in this way is multiplied by 1.2. These take into consideration the degree of visibility according to the weather and time zone. Furthermore, when the facility information 54 in the categorized information includes a specific facility such as an elementary school or a nursing home, the range of the risk determination area specified in this way is multiplied by 1.2. These take into account the safety of the facility users. The identification of the risk determination area is not limited to this, and can be changed as appropriate.

  Next, a risk determination terminal (determination terminal) is specified (ST86). In this case, the risk determination terminal is specified based on the updated position information 66 and position information 76 of the current state information of the pedestrian and the vehicle, and the area (distance) of the risk determination area. Using the above-described example, when the risk determination area for a pedestrian is an area 30 m from the current position information, if the vehicle exists within 30 m from the position information 66 of the current information, The in-vehicle device 3 and the portable terminal 1 of the pedestrian are specified as the risk determination terminal. Further, when the risk determination area of the vehicle is an area of 500 m within a certain angle range from the current position information, the walking is performed when a pedestrian exists within 500 m within the certain angle range from the position information 76 of the current information. The person's portable terminal 1 and the in-vehicle device 3 of the vehicle are specified as the risk determination terminal.

  Next, the risk level of the pedestrian and the vehicle corresponding to the risk level determination terminal is determined (ST87). In this case, the risk level of the pedestrian and the vehicle corresponding to the risk determination terminal corresponds to the updated age information 63 and age information 73 of the current information of the pedestrian and vehicle, and the position information 66 and the position information 77. The determination is made based on the management target information 55 and the coefficient information 56 of the type information. In the traffic accident prevention system according to the present embodiment, for example, a risk index value corresponding to age or the like is used for risk determination. Then, the degree of risk is determined by increasing or decreasing the index value according to the surrounding situation.

  Here, for example, 0 to 5 years old (infant), 6 to 12 years old (elementary school student), 13 to 18 years old (junior high school student / high school student), 19 to 22 years old (university student), 23 to 60 years old (member of society) and 61 to 61 years old Assume that 4 points, 3 points, 2 points, 1 point, 1 point, and 3 points are assigned as index values indicating the degree of risk for each 100-year-old (old person) (in the case of a pedestrian). Thereby, for example, for a pedestrian whose age information 63 included in the current information of the pedestrian is “10 years old” (for example, refer to “No. 1” shown in FIG. 6), the index value indicating the degree of risk is 3 Points are assigned. If this pedestrian exists in the area of categorized information (for example, see “No. 1” shown in FIG. 5) in which the management target information 55 is “elementary school student”, the management target included in the coefficient information 56 Therefore, the risk is doubled. Thereby, the risk level of the pedestrian is determined to be 6 points. If this pedestrian is present in the area of categorized information whose management target information 55 is “old man” (for example, see “No. 21” shown in FIG. 5), it is included in the coefficient information 56. Since it falls out of the scope of management, the risk level is maintained as it is. As a result, the risk level is determined to be 3 points.

  After the risk level of the pedestrian and the vehicle corresponding to the risk level determination terminal is determined in this way, the risk level is notified to the mobile terminal 1 and the in-vehicle device 3 that are the risk level determination terminal (ST88). . Specifically, a risk notification message (MSG) corresponding to the determined risk is transmitted to the mobile terminal 1 and the in-vehicle device 3 that are the risk determination terminals. For example, when the risk level is 1 to 3 points, “There are pedestrians (vehicles) ahead of XXm.” When the risk level is 4 to 6 points, “pedestrians (vehicles are ”Please be careful.” If the risk is 7-10 points, a risk notification message such as “There are pedestrians (vehicles) ahead. Is done. Note that the content of the danger notification message is not limited to this, and can be changed as appropriate. Any content may be used as long as the attention of the pedestrian or the driver of the vehicle can be alerted according to the content of the determined risk.

  When the risk notification message is received, the risk notification message is displayed on the mobile terminal 1 and the in-vehicle device 3 (ST89, ST90). For this reason, the pedestrian carrying the portable terminal 1 and the driver of the vehicle on which the in-vehicle device 3 is mounted can grasp information on the vehicle and the pedestrian according to the current position information. As a result, it is possible to alert the pedestrian during travel and the driver's attention during driving, thereby preventing the occurrence of a traffic accident.

  Next, in the server device 4, a target terminal (hereinafter referred to as “communication switching terminal”) to be switched from wide area communication to direct communication is selected (ST91). In this case, the risk determined in ST87 is used for selecting the communication switching terminal. Specifically, out of the risk levels of the determined risk level determination terminal, the risk level determination terminal determined to have the highest risk level and the corresponding risk level determination terminal are selected as communication switching terminals. . Here, a case where the mobile terminal 1 and the in-vehicle device 3 are selected as communication switching terminals is shown.

  Then, in order to switch from wide area communication to direct communication, a direct communication start instruction (direct communication start instruction) is transmitted to the communication switching terminal (mobile terminal 1 and in-vehicle device 3) (ST92). In this direct communication start instruction, parameters necessary for performing direct communication between communication switching terminals, that is, between the mobile terminal 1 and the in-vehicle device 3 (for example, the IP address of the mobile terminal 1, the IP of the in-vehicle device 3). Address, channel for communication in wireless LAN, and SSID that is an identifier of an access point). Thereby, it becomes possible for the portable terminal 1 and the vehicle-mounted apparatus 3 to communicate directly.

  When this direct communication start instruction is received, communication partners are mutually identified using the parameters included in the direct communication start instruction between the portable terminal 1 and the in-vehicle device 3, and direct communication is started (ST93). Thereby, since the risk determination terminal with the highest risk, that is, communication is performed between the portable terminal 1 and the in-vehicle device 3 by switching from wide area communication to high-speed direct communication, Compared with the risk determination terminal, a communication band can be secured, and processing for preferentially avoiding a traffic accident can be executed.

  As processing for avoiding traffic accidents, for example, it is conceivable to exchange position information with each other. By exchanging mutual location information in this way and displaying the location information of the counterpart terminal notified of the degree of danger on the display unit of the own device, it is possible to grasp the exact location of the counterpart side, so traffic It is possible to prevent accidents from occurring. Further, the distance to the partner terminal may be grasped based on the position information of the partner terminal, and the warning sound may be changed according to this distance. In this case, the warning sound can alert the pedestrian and the driver, so that it is possible to prevent a traffic accident from occurring. In addition, about the process for avoiding a traffic accident, it is not limited to these, It can change suitably.

  In addition, when direct communication is performed using the highest risk determination terminal as the communication switching terminal in this way, it is necessary to deal with a case where a risk determination terminal with a higher risk appears after the start of direct communication. Become. In such a case, a direct communication end request is transmitted from the server apparatus 4 to the communication switching terminal that is directly communicating, while a direct communication start instruction is newly issued to the communication switching terminal that permits direct communication. It is possible to send. Even when the communication switching terminal for direct communication is switched in this way, it is possible to prevent traffic accidents because the pedestrian and the driver of the vehicle know their risks before switching. it is conceivable that.

  As described above, in the traffic accident prevention system according to the present embodiment, the risk level of the pedestrian and the vehicle approaching each other is determined from the position information of the mobile terminal 1 and the in-vehicle device 3, and the risk level is determined based on the mobile terminal 1 and the in-vehicle system. Since the device 3 is notified, the degree of danger can be notified according to the approaching state based on the position information of the pedestrian and the vehicle, so that the occurrence of a traffic accident is prevented while considering the current state of the pedestrian and the vehicle. It becomes possible to do. Further, since communication is performed by direct communication between the mobile terminal 1 and the in-vehicle device 3 according to the determined risk level, for example, communication that reflects the current state of the pedestrian and the vehicle using direct communication is performed. Since it can be performed, it is possible to perform the process more quickly than in the case of performing a process for avoiding an accident using wide area communication.

  In particular, in the traffic accident prevention system according to the present embodiment, in the server device 4, the pedestrian information DB 44 and the pedestrian operation information detected by the mobile terminal 1 and the vehicle operation information detected by the in-vehicle device 3 are stored. It is managed by the vehicle information DB 45, and the risk determination area is specified according to the position information of the mobile terminal 1 and the in-vehicle device 3, and the pedestrian and vehicle operation information. Thereby, since the risk determination area can be enlarged or reduced according to the position information of the mobile terminal 1 and the in-vehicle device 2 and the operation information of the pedestrian and the vehicle, the current state of the pedestrian and the vehicle (approaching) It is possible to appropriately determine the degree of danger according to the state and the operating state.

  Further, in the traffic accident prevention system according to the present embodiment, the server device 4 manages typographic information obtained by typifying various types of information in a predesignated area, and the location information of the mobile terminal 1 and the in-vehicle device 3 is used. The risk determination area is specified according to the type information of the corresponding area. As a result, the risk determination area can be enlarged or reduced according to the type information associated with each area, so the current state of the pedestrian and vehicle (weather, time zone, surrounding facilities, etc.) It is possible to appropriately determine the degree of risk according to the situation. As a result, it is possible to prevent a traffic accident from occurring.

  In particular, in the traffic accident prevention system according to the present embodiment, the weather information 52, the time zone information 53, and the facility information 54 in the area are managed as type information, and correspond to the location information of the mobile terminal 1 and the in-vehicle device 3. The risk determination area is specified according to the contents of the area weather information 52, the time zone information 53, and the facility information 54. As a result, the risk determination area can be enlarged or reduced according to the contents of the weather information 52, the time zone information 53, and the facility information 54 of each area, so visibility according to the weather and traffic according to the time zone It is possible to appropriately determine the degree of risk according to the amount and the state of the user of a specific facility. As a result, it is possible to prevent a traffic accident from occurring.

  In the traffic accident prevention system according to the present embodiment, the server device 4 categorizes the management target information 55 according to the facility information 54 and the coefficient information 56 that increases or decreases the risk level according to the management target information 55. It is managed as information, and the degree of risk is determined according to the management object information 55 and coefficient information 56 corresponding to the identification information 61 and 71 of the mobile terminal 1 and the in-vehicle device 3. In this case, for example, the risk level of the management target (for example, the user of the facility) related to the facility can be increased or decreased based on the position information of the mobile terminal 1 and the in-vehicle device 3. It is possible to appropriately determine the risk level. As a result, it is possible to prevent a traffic accident from occurring.

  Furthermore, in the traffic accident prevention system according to the present embodiment, the server device 4 transmits a risk notification message for calling attention according to the risk to the mobile terminal 1 and the in-vehicle device 3. Thereby, it becomes possible to alert the pedestrian and the driver of the vehicle according to the degree of danger.

  Furthermore, in the traffic accident prevention system according to the present embodiment, the server device 4 causes the mobile terminal 1 having the highest degree of risk and the in-vehicle device 3 to communicate by direct communication. Thereby, it becomes possible to perform the process for avoiding a traffic accident using direct communication between the portable terminal 1 and the in-vehicle device 3 that are most likely to encounter a traffic accident. As a result, it is possible to prevent a traffic accident from occurring.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the above-described embodiment, a case has been described in which the risk determination terminal with the highest risk is selected as the communication switching terminal and switched from wide area communication to direct communication. However, the selection method of the communication switching terminal is not limited to this, and can be changed as appropriate. For example, a risk determination terminal having a higher risk than a predetermined threshold may be selected as the communication switching terminal. In this case, it is possible to reduce the processing load on the server device 4 as compared with the case where the risk determination terminal having the highest risk is selected. On the other hand, since processing for avoiding traffic accidents is performed by direct communication between the risk determination terminals selected as communication switching terminals, the original purpose of preventing traffic accidents can also be achieved.

  Moreover, in the said embodiment, the relationship between the pedestrian who carries the portable terminal 1 and the vehicle carrying the vehicle-mounted apparatus 3 is demonstrated. However, the risk management system according to the present invention is not limited to such a case, and is also applied between vehicles equipped with the in-vehicle device 3 or between pedestrians carrying the portable terminal 1. It is possible.

  Furthermore, although the said embodiment demonstrated the pedestrian who carries the portable terminal 1, this pedestrian shall include the person who got on the bicycle. By including a person who has ridden a bicycle as a pedestrian in this way, it is possible to alert the driver or pedestrian of the surrounding vehicle while reflecting the driving manners of the bicycle, and accidents such as contact with the bicycle can occur in advance. Can be prevented.

  Furthermore, in the said embodiment, although shown about the case where wireless LAN communication is used as an example of the direct communication performed between the portable terminal 1 and the vehicle-mounted apparatus 3, about the kind of direct communication performed between both Is not limited to this, and can be changed as appropriate. For example, direct communication using DSRC (dedicated narrow area communication), VLCC (visible light communication), UWB (ultra-wide band radio), or the like may be performed between the two. Even in such a change, the same effect as the above embodiment can be obtained.

  Furthermore, in the above-described embodiment, a case has been described in which the risk determination terminal is identified and then the risk is determined at the risk determination terminal, and the risk is notified. However, the present invention is not limited to this, and can be changed as appropriate. For example, a region that is determined to be dangerous is identified based on the categorization information registered in the categorization information DB 43, and even if the mobile terminal 1 or the in-vehicle device 3 that is the counterpart is not present, the mobile phones that belong to the region You may make it notify the danger degree to the terminal 1 or the vehicle equipment 3. In addition, when specifying the area determined to be dangerous, it becomes possible to specify the corresponding area more effectively by statisticalizing the typification information.

  Furthermore, in the said embodiment, it has shown about the case where the vehicle-mounted apparatus 3 detects the operation | movement of the vehicle which the 3D sensor 36 detected. Such information is transmitted to the server device 4 as operation information included in the vehicle information, and is used in the server device 4 to determine the degree of risk. The operation information used for such risk determination is not limited to this, and can be changed as appropriate. For example, vehicle control information such as engine brake acquired via a CAN (Controller Area Network) mounted on the vehicle may be transmitted to the server device 4 as operation information.

It is a block diagram which shows schematic structure for demonstrating the traffic accident prevention system which concerns on one embodiment of this invention. It is a block diagram which shows schematic structure of the portable terminal in the system shown in FIG. It is a block diagram which shows schematic structure of the vehicle-mounted apparatus in the system shown in FIG. It is a block diagram which shows schematic structure of the server apparatus in the system shown in FIG. It is a figure which shows the example of the management table in the typification information database of the server apparatus which concerns on the said embodiment. It is a figure which shows the example of the management table in the pedestrian information database of the server apparatus which concerns on the said embodiment. It is a figure which shows the example of the management table in the vehicle information database of the server apparatus which concerns on the said embodiment. It is a sequence diagram for demonstrating operation | movement in the traffic accident prevention system which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile terminal 2 Mobile communication network 3 In-vehicle apparatus 4 Server apparatus 11, 31, 41 Control part 12, 32, 42 Communication control part 13 Input part 14, 33 Display part 15, 34 GPS apparatus 16, 35, 46 Application control part 17 36 3D sensor 18, 37 P2P communication control unit 43 Typified information DB
44 Pedestrian Information DB
45 Vehicle information DB

Claims (10)

A portable terminal device that detects position information of the own device, an in-vehicle device that is mounted on a vehicle and detects position information of the own device, and a position that is transmitted from the portable terminal device and the in-vehicle device through wide-area communication via a mobile communication network A pedestrian carrying the mobile terminal device based on information and a server device for determining a risk indicating the possibility of the vehicle encountering an accident,
The server device determines the risk level of the pedestrian and the vehicle approaching each other from position information of the mobile terminal device and the vehicle-mounted device, notifies the risk level to the mobile terminal device and the vehicle-mounted device, and A traffic accident prevention system characterized in that communication is performed by direct communication between the mobile terminal device and the in-vehicle device according to the degree.   While the mobile terminal device detects the pedestrian's motion information, the vehicle-mounted device detects the vehicle's motion information, the server device detects the mobile terminal device and the vehicle-mounted device position information, and the pedestrian The traffic accident prevention system according to claim 1, wherein a range in which the degree of risk is determined is specified in accordance with vehicle operation information.   The server device manages categorized information that categorizes various types of information in a predesignated area, and determines the risk according to the categorized information of the area corresponding to the position information of the mobile terminal device and the in-vehicle device. The traffic accident prevention system according to claim 1 or 2, wherein a determination range is specified.   The server device manages at least one of weather information, time zone information, and facility information in a predesignated area as the categorized information, and the area of the area corresponding to the position information of the mobile terminal device and the in-vehicle device 4. The traffic accident prevention system according to claim 3, wherein a range for determining the degree of risk is specified according to the contents of weather information, time zone information, and facility information.   The server device manages management target information according to the facility information and coefficient information that increases or decreases the risk according to the management target information as the categorized information, and identification information of the mobile terminal device and the in-vehicle device The traffic accident prevention system according to claim 4, wherein the degree of risk is determined according to the management target information and coefficient information corresponding to.   The traffic accident prevention system according to any one of claims 1 to 5, wherein the server device transmits a message for calling attention according to the degree of risk to the portable terminal device and the in-vehicle device.   The traffic accident according to any one of claims 1 to 6, wherein the server device causes communication by direct communication between the mobile terminal device having the highest degree of risk and the in-vehicle device. Prevention system.   7. The server device according to claim 1, wherein the server device causes the mobile terminal device and the in-vehicle device to perform communication by direct communication, wherein the degree of risk is higher than a predetermined threshold value. The traffic accident prevention system described in 1. A mobile terminal device that detects position information of the own device and a server device that is mounted on a vehicle and is connected to an in-vehicle device that detects position information of the own device via a mobile communication network
A risk level indicating a possibility that a pedestrian carrying the mobile terminal device and the vehicle may encounter an accident based on position information transmitted from the mobile terminal device and the vehicle-mounted device in wide area communication via the mobile communication network. The risk determination unit for determining, the pedestrian and the vehicle approaching each other from the position information of the mobile terminal device and the vehicle-mounted device are determined, and the risk level is determined for the mobile terminal device and the vehicle-mounted device corresponding to the pedestrian and the vehicle. A server device, comprising: a risk notification unit that notifies the communication device; and a direct communication instruction unit that performs communication by direct communication between the mobile terminal device and the in-vehicle device according to the risk level. A traffic accident prevention method in a mobile terminal device that detects position information of its own device and a server device that is mounted on a vehicle and connected to an in-vehicle device that detects position information of its own device via a mobile communication network,
A risk level indicating a possibility that a pedestrian carrying the mobile terminal device and the vehicle may encounter an accident based on position information transmitted from the mobile terminal device and the vehicle-mounted device in wide area communication via the mobile communication network. The pedestrian and the vehicle approaching each other are determined from the determining step and the positional information of the portable terminal device and the in-vehicle device, and the degree of risk is notified to the portable terminal device and the in-vehicle device corresponding to the pedestrian and the vehicle. A traffic accident prevention method comprising: a step, and a step of performing communication by direct communication between the mobile terminal device and the in-vehicle device according to the degree of risk.

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