JP6698898B2 - Driving support method, vehicle-mounted device, and service server - Google Patents

Description

  The present invention relates to a driving support method, an on-vehicle device, and a service server that extract unusable roads and traffic congestion prediction roads based on weather prediction information and natural disaster prediction information to support driving of users.

  Conventionally, in a road information system, congestion information and required time are passed through roadside communication devices (radio wave beacons, optical beacons) that are installed mainly on highways, urban highways, and major general roads in and around urban areas. , Road traffic information such as speed regulation information due to accident vehicles and construction is provided to road users by displaying it on the screen of the corresponding on-vehicle device.

  In addition, an ITS spot compatible vehicle-mounted device using DSRC (Dedicated Short Range Communications, dedicated short range communication) as a wireless communication system with a radio beacon is becoming widespread. The ITS spot compatible vehicle-mounted device is capable of high-speed and large-capacity communication as compared with the conventional vehicle-mounted device, and thus can provide various services to users.

  In the conventional ITS spot service system, dynamic route guidance, safe driving support, ETC service and Internet connection service in a service area are provided. In addition, as disclosed in Patent Document 1, a technique in which a smartphone is connected to an ITS spot-compatible in-vehicle system and a navigation image generated in the smartphone is displayed on a display device of the in-vehicle system is also widespread.

JP, 2014-85844, A

  In the conventional ITS spot service system, in addition to current traffic congestion information, traffic restrictions information due to accidents, etc., weather information such as precipitation, earthquake, tsunami occurrence information, road closure information due to heavy snow and freezing, etc. providing.

  However, based on future weather forecast information and natural disaster forecast information, it is not possible to extract dangerous roads that should be avoided and to provide the information to users. There was no choice but to decide the route based on weather information and natural disaster information. Moreover, even in the dynamic route guidance, the route search considering future weather forecast information and natural disaster forecast information was not performed.

  In recent years, landslides and inundation of rivers due to local heavy rainfall have frequently occurred, and as a road user's support for safe driving, provision of road availability information based not only on current but future weather forecast information and natural disaster forecast information And route search is desired. Information on river water level and flooding was provided by the river system of the Ministry of Land, Infrastructure, Transport and Tourism, but it was not used because it was not incorporated into the ITS spot service system.

  The present invention has been made in order to solve the above problems, and determines whether or not to use the road from the present to several hours ahead based on the weather prediction information and the natural disaster prediction information, and also reduces the traffic congestion on the road. An object of the present invention is to provide a driving support method, a vehicle-mounted device, and a service server that predict and support driving of a road user.

The driving support method according to the present invention, as road use determination information used to determine the availability of road use up to several hours from now, weather information including weather prediction information, and natural disaster information including natural disaster prediction information. Collecting and storing the collected road use judgment information in the storage means, collecting road use judgment information, extracting road use judgment information from the storing means, and acquiring the extracted road use judgment information Based on the road use determination information acquisition step and the level of the acquired road use determination information, road availability is determined, road congestion is predicted, and road unavailability and traffic congestion predicted road are extracted. A step of displaying the extracted unusable road and the predicted congestion road, and in the road availability judgment step, the road usage determination information relating to the traffic congestion that is predicted to be congested at the threshold level or higher . It has a traffic jam judgment threshold setting table with threshold levels set, compares the level of the acquired road use judgment information with the threshold levels of the traffic jam judgment threshold setting table, and extracts roads in areas above the threshold level as traffic jam predicted roads. Is.
In addition, the vehicle-mounted device according to the present invention uses a wireless communication via a roadside communication device with a service server that collects and stores weather information including weather prediction information and natural disaster information including natural disaster prediction information as road use determination information. An on-vehicle device that communicates, based on the level of road use determination information acquired by the road use determination information acquisition unit that acquires the road use determination information received via the roadside communication device, and the road use determination information acquisition unit, Road availability determination means for determining road availability and predicting road congestion and extracting unusable roads and traffic congestion forecast roads, and unavailable roads and traffic congestion forecast roads extracted by the road availability availability determination means a display means for, road usage determination means includes a congestion determination threshold setting table road sets the threshold level of the road usage determination information related to traffic congestion is expected to congestion at or above a threshold level, road usage The level of the road use determination information acquired by the determination information acquisition means is compared with the threshold level of the traffic congestion determination threshold setting table, and roads in the area above the threshold level are extracted as traffic congestion predicted roads.
Further, the service server according to the present invention is a service server that communicates with an on-vehicle device mounted on a vehicle by wireless communication via a roadside communication device, and is used for determining whether or not a road can be used for several hours from now. Roads that collect meteorological information including weather forecast information and natural disaster information including natural disaster forecast information from external systems via a network as road use decision information to be used, and save the collected road use decision information in storage means. A road use extracted by the road use decision information extracting means, which has a road use decision information collecting means and a road use decision information extracting means for extracting the road use decision information from the storage means and transmitting it to the vehicle-mounted device via the roadside communication device. In the determination information, a threshold value used for determining whether or not a road can be used and a threshold value used for predicting road congestion are set separately.

  According to the driving support method of the present invention, as the road use determination information, the weather information including the weather forecast information and the natural disaster information including the natural disaster forecast information are collected, and whether or not the road can be used for several hours from now. Since it is decided to judge the road congestion and predict the road congestion, road users should avoid the roads where danger is predicted and roads where traffic congestion is predicted based on future weather forecasts and natural disaster forecasts. Therefore, safe driving is supported and convenience is improved.

It is a figure which shows the structure of the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the precipitation level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the weather warning in the ITS spot service system which concerns on Embodiment 1 of this invention, and a warning level setting table. It is a figure which shows the thunder and tornado level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the tsunami warning and the alert level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the earth and sand disaster caution level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the volcanic eruption alert level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the flood forecast level setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the road use availability judgment threshold value setting table in the ITS spot service system which concerns on Embodiment 1 of this invention. It is a figure which shows the flow of the road availability propriety determination processing in the ITS spot corresponding onboard equipment which concerns on Embodiment 1 of this invention. It is a figure which shows the example of a display of the unusable road extracted by the onboard equipment corresponding to the ITS spot which concerns on Embodiment 1 of this invention. It is a figure which shows the flow of the route guidance process in the ITS spot corresponding onboard equipment which concerns on Embodiment 2 of this invention. It is a figure which shows the road availability propriety determination result in the ITS spot corresponding onboard equipment which concerns on Embodiment 2 of this invention. It is a figure which shows the example of a display of the route guidance in the ITS spot corresponding onboard equipment which concerns on Embodiment 2 of this invention.

Embodiment 1.
Hereinafter, the ITS spot service system according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of the ITS spot service system according to the first embodiment. The ITS spot service system includes an ITS spot compatible vehicle-mounted device 1 mounted on a vehicle 100, a radio beacon 2 (also referred to as an ITS spot) that is a roadside communication device installed along a road 200, a Ministry of Land, Infrastructure, Transport and Tourism and road traffic. An ITS spot service server 3 installed in a management center 300 of an information communication system (VICS (registered trademark)) is provided.

  The ITS spot compatible vehicle-mounted device 1 (hereinafter abbreviated as vehicle-mounted device 1) has a first wireless communication unit 11, the radio wave beacon 2 has a second wireless communication unit 21, and the ITS spot service server 3 (hereinafter , Abbreviated as server 3) has a third wireless communication means 31. The first wireless communication means 11 and the third wireless communication means 31 communicate with each other via the second wireless communication means 21.

  The vehicle position information acquisition means 32 of the server 3 acquires the vehicle position information transmitted from the first wireless communication means 11 of the vehicle-mounted device 1 to the second wireless communication means 21 via the third wireless communication means 31. To do. The road use determination information collecting means 33 uses the weather information including the weather forecast information and the natural disaster information including the natural disaster forecast information as the road use determination information used to determine whether or not the road can be used for several hours from now. , From an external system via the network 4.

  The external system is, for example, a short-term precipitation forecast by the Japan Meteorological Agency 51, radar/nowcast, a river system or road system of the Ministry of Land, Infrastructure, Transport and Tourism, or a private weather information service company 53. The road use determination information collecting unit 33 also stores the collected road use determination information in the storage unit 34.

  The weather information collected as road use determination information includes at least one of precipitation information, precipitation prediction information, a special weather warning, a weather warning, a weather warning, and the like. In addition, the natural disaster information collected as road use judgment information includes major tsunami warnings, tsunami warnings, tsunami warnings, sediment disaster warning information, volcanic eruption warning information, commentary information on volcanic conditions, and river flood forecasts. Contains at least one.

  The road use determination information extraction unit 35 extracts the road use determination information from the storage unit 34 and transmits it to the second wireless communication unit 21 by the third wireless communication unit 31. The road use determination information extracted by the road use determination information extraction unit 35 may be information of an area including all roads managed by the management center 300, or the vehicle position acquired by the vehicle position information acquisition unit 32. The related area of the vehicle may be specified based on the information, and the road use determination information of the related area may be extracted from the storage unit 34.

  Further, the vehicle position information detecting means 12 of the vehicle-mounted device 1 detects vehicle position information including latitude and longitude information and time information of the own vehicle. The detected vehicle position information is transmitted to the second wireless communication unit 21 by the first wireless communication unit 11. The road use determination information acquisition unit 13 acquires the road use determination information received by the first wireless communication unit 11 via the second wireless communication unit 21, and temporarily stores it in the second storage unit (not shown). save.

  The road use availability determination means 14 determines the availability of road usage based on the road usage determination information acquired by the road usage determination information acquisition means 13, and extracts unusable roads. The road use availability determination unit 14 has a threshold setting table (see FIG. 9) in which a threshold level of road use determination information that determines that road use is disabled is set. When determining whether to use the road, the levels of the weather information and the natural disaster information included in the road use determination information acquired by the road use determination information acquisition unit 13 are compared with the threshold level of the threshold setting table, and the threshold level or more is exceeded. It is determined that the road in the area is unavailable.

  The unusable road extracted by the road availability determining unit 14 is a dangerous road that is likely to be subject to traffic regulation, speed regulation, or traffic closure in the future. Even if it is possible to pass, there is a possibility that it may cause traffic congestion and secure driving may not be possible, so it is a road that should be avoided.

  Further, the road availability determining unit 14 determines the availability of the road at each predetermined time from the present to several hours ahead, and extracts the unavailable road at each time. This predetermined time is set in advance, and is set to be, for example, every 15 minutes at an hour, 15 minutes, 30 minutes, and 45 minutes in normal times, and at an interval of 5 minutes when there is an abnormality such as heavy rain.

  The route search means 15 searches for a route from the current location to the destination. As the existing route search means 15, the dynamic route guidance of the ITS spot service is known. The display unit 16 has a screen for displaying the search result by the route search unit 15 and the unusable roads extracted by the road availability determining unit 14.

  In the ITS spot service system according to the first embodiment, specific examples of the road use determination information used for determining the availability of road use are shown in FIGS. 2 to 8. Further, FIG. 9 shows a threshold setting table in which the threshold level of the road use determination information is set. The meteorological information and the natural disaster information included in the road use determination information are set by the road use availability determination means 14 as level 1, level 2,...

  FIG. 2 shows a precipitation level setting table in which levels are set for precipitation obtained from the Meteorological Agency's short-term precipitation forecast or radar/nowcast. In the example shown in FIG. 2, the amount of precipitation is set from level 1 to level 5, and the amount of precipitation in which the road becomes like a river is 30 mm/hr or more and less than 50 mm/hr is set as level 3 and is set as a threshold value.

  Radar/Nowcast continuously displays precipitation intensity distribution observations by the meteorological radar every 5 minutes and precipitation intensity distribution forecasts every 60 minutes by precipitation Nowcast up to 60 minutes ahead. By matching the level setting in the precipitation level setting table shown in FIG. 2 with the setting of the precipitation intensity in radar nowcast, the precipitation information from radar nowcast can be used as it is.

  Further, FIG. 3 shows a weather warning announced by the Japan Meteorological Agency, a weather warning in which a level is set for a warning, and a warning level setting table. In the example shown in FIG. 3, the weather warning and the warning are set to any of the levels 1 to 3, and the fog warning is set to the level 2 and the others are set to the level 1. Further, a special warning (heavy rain, storm, storm snow, heavy snow) having a particularly high degree of danger is set to level 3, an alarm (heavy rain, flood, storm, storm snow, heavy snow) is set to level 2, and level 2 is set as a threshold.

  FIG. 4 shows a lightning/tornado level setting table in which a level is set for the lightning/tornado information obtained from the radar nowcast. In the example shown in FIG. 3, the lightning information and the tornado information are set to level 1 and level 2, respectively (thresholds for the thunder and tornado information are omitted in the threshold setting table of FIG. 9).

  FIG. 5 shows a tsunami warning issued by the Japan Meteorological Agency, a tsunami warning in which a level is set for a warning, and a warning level setting table. In the example shown in FIG. 5, the tsunami warning and the warning are set from level 1 to level 5, and the threshold level is level 3 which predicts a tsunami of 3 to 5 m in the large tsunami warning. Tsunami warnings and warnings are used to determine the availability of roads in coastal areas.

  FIG. 6 shows a sediment-related disaster warning level setting table in which levels are set for sediment-related disaster warning information (mesh information) announced by the Meteorological Agency. The landslide disaster warning judgment mesh information displays the area where the risk of landslide disaster is increasing in 5 steps in 5km grid units, and updates it every 10 minutes. We also make predictions. In the example shown in FIG. 6, the threshold is level 3 which is an area exceeding the soil rainfall index standard of the heavy rain warning.

  FIG. 7 shows a volcanic eruption alert level setting table in which levels are set for volcanic eruption alert information announced by the Meteorological Agency. In the example shown in FIG. 7, the crater periphery regulation is set to level 1, the mountain entry regulation is set to level 2, and the level 2 is set as the threshold value. The volcanic eruption alert information is used to determine whether or not the road near the volcano can be used. It should be noted that whether or not the road can be used may be determined based on commentary information on the condition of the volcano announced by the Meteorological Agency.

  FIG. 8 shows a flood forecast level setting table in which levels are set for flood forecasts obtained from the river system of the Ministry of Land, Infrastructure, Transport and Tourism. In the example shown in FIG. 8, the flood forecast is set from level 1 to level 4, and the level 3 of flood risk information announcement is used as the threshold value. The flood forecast is used to judge the availability of roads near rivers. Note that rainfall data and water level data can also be obtained from the river system using telemeters.

  Next, the flow of road availability determination processing in the vehicle-mounted device 1 will be described with reference to the flowchart in FIG. 10. In step 1 (S1), the road use determination information acquisition unit 13 acquires the road use determination information and temporarily stores it in the second storage unit. Subsequently, in step 2 (S2), the road availability determining unit 14 obtains the short-term precipitation forecast or the precipitation forecast by radar/nowcast included in the road availability determination information. If there is precipitation, step 3 (S3) ), and obtain the precipitation forecast for each area at a predetermined time.

  Subsequently, in step 4 (S4), the road availability determining unit 14 causes the precipitation (prediction) level for each area at the predetermined time acquired in S3 and the precipitation threshold level set in the threshold setting table (FIG. 9). Are compared with each other, and it is determined that the time when the level is equal to or higher than the threshold level and the use of the road in the area are not allowed, and the process proceeds to step 5 (S5). In addition, in S2, when there is no precipitation, it progresses to S5 as it is.

  In S5, the road availability determining unit 14 obtains the weather warning and the warning included in the road usage determination information. If the weather warning or the warning is being issued, the process proceeds to step 6 (S6), and the weather warning and the warning are issued. If there is an area whose information level is equal to or higher than the threshold level, it is determined that the road cannot be used in the area, and the process proceeds to step 7 (S7). If there is no announcement in S5, the process directly proceeds to S7.

  Subsequently, in S7, the road availability determining unit 14 acquires the large tsunami warning and the tsunami warning included in the road usage judgment information, and if the large tsunami warning or the tsunami warning is being issued, the process proceeds to step 8 (S8), When there is an area where the level of the tsunami warning or the tsunami warning is equal to or higher than the threshold level, it is determined that road use in the area is not possible, and the process proceeds to step 9 (S9). If there is no announcement in S7, the process directly proceeds to S9.

  In S9, the road use availability determination means 14 acquires the sediment-related disaster warning information included in the road-use determination information, and if the sediment-related disaster warning information is being issued, the process proceeds to step 10 (S10), and the level of the sediment-related disaster warning information. If there is an area equal to or higher than the threshold level, it is determined that the road cannot be used in the area, and the process proceeds to step 11 (S11). If there is no official announcement in S9, the process directly proceeds to S11.

  Subsequently, in S11, the road availability determining unit 14 acquires the volcanic eruption alert information included in the road availability determination information. If the volcanic eruption alert information is being issued, the process proceeds to step 12 (S12), If there is an area where the eruption alert information level is equal to or higher than the threshold level, it is determined that the road cannot be used in the area, and the process proceeds to step 13 (S13). If there is no official announcement in S11, the process directly proceeds to S13.

  In S13, the road availability determining unit 14 obtains the flood forecast of the river included in the road availability determination information. If the flood forecast is being issued, the process proceeds to step 14 (S14), and the flood forecast level is equal to or higher than the threshold level. If there is any area, it is determined that the road cannot be used in the area, and the process proceeds to step 15 (S15). If there is no official announcement in S13, the process directly proceeds to S15. In S15, the road availability determining unit 14 extracts the unavailable road for each time based on the determination results of S2 to S14, and ends the process.

  FIG. 11 shows an example in which the unavailable roads extracted by the above road availability determination processing are displayed on the display unit 16. In the example shown in FIG. 11, a dangerous area in which the predicted precipitation amount at 13:00, 13:30, and 14:00 exceeds the threshold level is displayed, and road A included in the dangerous area is emphasized as an unusable road. Is displayed. Thereby, the road user can avoid the road A and determine the route.

  In the first embodiment, the road use determination information used to determine whether or not the road can be used is not limited to the weather information and the natural disaster information shown in FIGS. There is no. Further, for example, photochemical smog information, yellow sand information, etc. may be used depending on the regional characteristics. Furthermore, the order of the determination process in the flowchart of FIG. 10 is not limited, and the order can be changed.

  As described above, according to the ITS spot service system according to the first embodiment, as the road use determination information, the weather information including the weather prediction information and the natural disaster information including the natural disaster prediction information are transmitted from the external system to the network 4 The road users can determine whether or not the road can be used for several hours from now, so road users will be unable to use roads that are predicted to be dangerous based on future weather forecasts and natural disaster forecasts. It is possible to avoid this and make a route decision, which supports safe driving.

  In addition, compared to the conventional system that provided road users with the weather information and natural disaster information provided from external systems as they are, this system extracts unusable roads and presents them to road users. The user does not need to judge which road is dangerous, and the safe driving support is highly convenient for the user.

Embodiment 2.
In the ITS spot service system according to the second embodiment of the present invention, the road availability determining process described in the first embodiment is applied in combination with the route guidance by the route searching means 15 of the vehicle-mounted device 1. The configuration of the ITS spot service system according to the second embodiment is similar to that of the above-described first embodiment, and therefore FIG.

  In the second embodiment, the road availability determining unit 14 calculates the passing time of the vehicle 100 on the road extracted by the route searching unit 15, and the points on the road at each passing time correspond to the unusable road. In this case, the road is excluded from the route search targets.

  The flow of route guidance processing in the route search means 15 of the vehicle-mounted device 1 according to the second embodiment will be described with reference to the flowchart of FIG. In step 21 (S21), the route search means 15 acquires the destination input by the user, and in step 22 (S22), extracts a plurality of route candidates from the current value to the destination. Here, it is assumed that two route candidates, route 1 and route 2, are extracted.

  In step 23 (S23), the road use determination information acquisition means 13 acquires road use determination information. Subsequently, in step 24 (S24), the road availability determining unit 14 determines road availability based on the road availability determination information acquired in S23. Note that the road availability determination processing of S24 is the same processing as S2 to S15 of the flowchart of FIG. 10, and therefore description thereof will be omitted here.

  Then, in step 25 (S25), if the result of the road availability determination processing of S24 is that there is an unusability determination (YES), the process proceeds to step 26 (S26), and the unusable road is the route for which the route guidance is extracted. It is determined whether or not it corresponds to 1 or route 2. When the unusable road corresponds to the extraction road (YES), the process proceeds to step 27 (S27) and the passage time of the extraction road is calculated.

  Subsequently, in step 28 (S28), it is determined whether or not the point on the road at the passage time obtained in S27 cannot be used. When it is determined that the road cannot be used in S28 (YES), the process proceeds to step 29 (S29) to notify that the road is dangerous and exclude the corresponding route from the route guidance. If the dangerous place is in the vicinity area, voice notification may be given.

  On the other hand, if there is no unusability determination in S25 (NO), if the unusable road does not correspond to the extracted road in the route guidance in S26 (NO), and if the corresponding point of the road at the passage time is available in S28 ( If NO, the process proceeds to step 30 (S30), and normal route guidance is performed using the extracted route candidates.

  FIG. 13 shows the result of the road availability determination processing in the case where the unusable road corresponds to the route 2 which is the route guidance extraction road, and FIG. 14 shows a display example of the route guidance on the display means 16. In the example shown in FIG. 13, in route 2, passing point A, point B, point C, and point D at passage times 13:30, 13:45, 14:00, and 14:15, respectively. Is calculated.

  FIG. 13 shows the level of road use determination information at each passage time point. At the point C at 14:00 and the point D at 14:15, the level of precipitation is equal to or higher than the threshold value, and the road cannot be used. Therefore, the route 2 is not subject to the route guidance, and the route 1 not corresponding to the unusable road is subject to the route guidance.

  According to the second embodiment, in addition to the effects similar to those of the first embodiment, it becomes possible to perform a route search based on future weather forecast information and natural disaster forecast information, and road users can drive safely. It will be supported and convenience will be further improved.

Embodiment 3.
In the first and second embodiments, the unusable road is extracted based on the road use determination information including the weather information and the natural disaster information. In the third embodiment, the road use determination information is used to extract the road. The traffic congestion is predicted and the traffic congestion prediction information is provided to road users. The configuration of the ITS spot service system according to the third embodiment is the same as that of the above-described first embodiment, and therefore FIG.

  The ITS spot service system according to the third embodiment determines whether or not the road can be used as in the first embodiment, and also predicts road congestion. Even on a road that does not correspond to an unusable road, congestion may occur depending on weather conditions. For example, in the precipitation level setting table shown in FIG. 2, the threshold value of road availability determination is level 3, but even at level 2 of heavy rain, the vehicle slows down and traffic congestion is predicted. Similarly, congestion may be predicted for weather warnings and warnings.

  In the third embodiment, a threshold value used for traffic congestion prediction is set separately from the threshold value used for road availability determination. The road use availability determination unit 14 has a traffic congestion determination threshold setting table (not shown) in which a threshold level of road usage determination information that predicts that the road is congested is set. Note that there is no need to set a threshold for natural disaster information that is considered to be unrelated to traffic congestion.

  The road use availability determination unit 14 compares the level of the road use determination information acquired by the road use determination information acquisition unit 13 with the threshold level of the traffic congestion determination threshold setting table, and extracts a road in an area equal to or higher than the threshold level as a traffic congestion predicted road. To do. The extracted traffic jam prediction road is displayed on the display unit 16 separately from the unusable road.

  In the third embodiment, when the route search means 15 provides route guidance, the road availability determination means 14 calculates the passage time of the vehicle on the road extracted by the route search means 15, and the road at each passage time. It is determined whether the above point corresponds to an unusable road or a traffic jam prediction road. When it corresponds, the display means 16 displays that the extracted road is an unusable road or a traffic jam predicted road.

  According to the third embodiment, in addition to the effects similar to those of the first and second embodiments, the road congestion is predicted based on the road use determination information. Therefore, the road user predicts the traffic congestion. It becomes possible to avoid the road and select the road, which further improves convenience. In the present invention, the respective embodiments can be freely combined, or the respective embodiments can be appropriately modified or omitted within the scope of the invention.

  INDUSTRIAL APPLICABILITY The present invention can be used as an ITS spot compatible vehicle-mounted device and an ITS spot service server of an ITS spot service system.

1 ITS spot compatible vehicle-mounted device, 2 radio beacons,
3 ITS spot service server, 4 network,
11 first wireless communication means, 12 vehicle position information detection means,
13 road use determination information acquisition means, 14 road use availability determination means,
15 route search means, 16 display means, 21 second wireless communication means,
31 third wireless communication means, 32 vehicle position information acquisition means,
33 road use determination information collection means, 34 storage means, 35 road use determination information extraction means,
51 Meteorological Agency, 52 Ministry of Land, Infrastructure, Transport and Tourism, 53 Private weather information service company,
100 vehicles, 200 roads, 300 management centers

Claims (16)

As road use determination information used to determine whether or not to use the road for several hours from now, weather information including weather forecast information and natural disaster information including natural disaster forecast information are collected, and the road use determination information is collected. A step of collecting road use judgment information for storing
A road use determination information extracting step of extracting road use determination information from the storage means;
A road use determination information acquisition step of acquiring the extracted road use determination information,
Based on the level of the acquired road use determination information , a road use availability determination step of determining availability of road usage, predicting road congestion, and extracting unavailable roads and congestion predicted roads,
Including a display step for displaying the extracted unusable road and the traffic jam prediction road,
In the road use availability determination step, there is a traffic congestion determination threshold setting table in which a threshold level of road usage determination information related to traffic congestion that is predicted to be traffic congestion at a threshold level or higher is set, and the level of the acquired road usage determination information. Is compared with the threshold level of the traffic jam determination threshold setting table, and roads in areas above the threshold level are extracted as traffic jam prediction roads.   A vehicle position information detecting step of detecting vehicle position information including latitude and longitude information and time information of the vehicle; and in the road use determination information extracting step, based on the vehicle position information detected in the vehicle position information detecting step. The driving support method according to claim 1, wherein a related area of the vehicle is specified, and road use determination information of the related area is extracted from the storage unit.   In the road use availability determination step, there is a threshold setting table that sets a threshold level of road use determination information that determines that road usage is not possible, and the obtained level of road use determination information is compared with the threshold level of the threshold setting table. However, it is determined that road use in an area equal to or higher than the threshold level is prohibited, and the driving support method according to claim 1 or 2.   The weather information collected as the road use determination information in the road use determination information collecting step includes at least one of precipitation information, precipitation prediction information, a special weather warning, a weather warning, and a weather warning. The driving support method according to any one of claims 1 to 3.   In the road use judgment information collecting step, the natural disaster information collected as road use judgment information includes a large tsunami warning, a tsunami warning, a tsunami warning, a sediment disaster warning information, a volcanic eruption warning information, and a river flood forecast. The driving support method according to claim 1, further comprising at least one.   The road use availability determination step determines whether or not a road is available for use every predetermined time from the present to several hours ahead, and extracts an unavailable road for each time. The driving support method described in (1).   Including the route search step of searching the route from the current position to the destination, in the road availability determination step, the passage time of the vehicle on the road extracted in the route search step is calculated, and on the road at each passage time The driving support method according to claim 6, wherein when the point corresponds to an unusable road, the road is excluded from the route search targets. A vehicle-mounted device that communicates by wireless communication via a roadside communication device with a service server that collects and stores weather information including weather forecast information and natural disaster forecast information that includes weather forecast information as road use determination information,
A road use determination information acquisition means for acquiring road use determination information received via the roadside communication device;
Based on the level of the road use determination information acquired by the road use determination information acquisition means, it is determined whether or not the road can be used, the traffic congestion of the road is predicted, and the road availability determination means that extracts the unavailable road and the traffic congestion predicted road. When,
A display means for displaying the unusable road and the traffic jam predicted road extracted by the road availability determining means,
The road availability determination means has a traffic congestion determination threshold setting table that sets a threshold level of road usage determination information related to traffic congestion that is predicted to be traffic congestion at a threshold level or higher, and the road usage determination information acquisition means An on-vehicle device, characterized in that a level of the acquired road use determination information is compared with a threshold level of the congestion determination threshold setting table, and a road in an area equal to or higher than the threshold level is extracted as a congestion predicted road.   It has a vehicle position information detection means for detecting vehicle position information including latitude and longitude information and time information of the own vehicle, and the detected vehicle position information is transmitted to the service server via the roadside communication device. The vehicle-mounted device according to claim 8, which is characterized in that.   The road use availability determination unit has a threshold setting table in which a threshold level of road use determination information for determining that road use is disabled is set, and the level of the road use determination information acquired by the road use determination information acquisition unit is set to the level. The vehicle-mounted device according to claim 8 or 9, wherein the vehicle-mounted device is compared with a threshold level of a threshold setting table and it is determined that road use in an area equal to or higher than the threshold level is prohibited.   11. The road use availability determination means determines availability of road use at each predetermined time from the present to several hours ahead, and extracts an unavailable road at each time. The vehicle-mounted device according to item 1.   A route search means for searching a route from the current position to the destination is provided, and the road availability determining means calculates a passing time of the vehicle on the road extracted by the route searching means, and the road on the road at each passing time is calculated. The vehicle-mounted device according to claim 11, wherein when the point corresponds to an unusable road, the road is excluded from the route search targets. A service server that communicates with an on-vehicle device mounted on a vehicle by wireless communication via a roadside communication device,
As road use determination information used to determine whether to use the road for several hours from now, weather information including weather forecast information and natural disaster information including natural disaster forecast information are collected from an external system via a network. A road use determination information collecting means for storing the collected road use determination information in a storage means,
A road use determination information extraction unit that extracts road use determination information from the storage unit and transmits the road use determination information to the vehicle-mounted device via the roadside communication device;
In the road use determination information extracted by the road use determination information extraction means, a threshold used for determining the availability of road and a threshold used for road congestion prediction are set separately.   The road use determination information extraction means specifies a related area of the vehicle based on vehicle position information received via the roadside communication device, and extracts road use determination information of the related area from the storage means. The service server according to claim 13, which is characterized in that.   The weather information collected by the road use determination information collecting means as road use determination information includes at least one of precipitation information, precipitation prediction information, a special weather warning, a weather warning, and a weather warning. 15. The service server according to claim 13 or 14.   The natural disaster information collected as road use determination information by the road use determination information collecting means is at least a large tsunami warning, a tsunami warning, a tsunami warning, a landslide disaster warning information, a volcanic eruption warning information, and a river flood forecast. 16. The service server according to claim 13, wherein the service server includes one.

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