JP2019109248A - Drive support method, on-vehicle unit and service server - Google Patents

Abstract

To support road-user's safety driving by determining whether roads can be used from the present to several hours later based upon meteorological information and natural disaster prediction information, and predicting congestion of the road.SOLUTION: Road use determination information gathering means 33 gathers, as road use determination information to be used to determine whether roads can be used from the present to several hours later and to predict congestion of the roads, meteorological information including meteorological prediction information and natural disaster information including natural disaster prediction information from an external system through a network 4. Road use propriety determination means 14 has a threshold setting table in which threshold levels of the road use determination information for determining that roads cannot be used are set, compares levels of meteorological information and natural disaster information included in the acquired road use determination information with the threshold levels of the threshold setting table, and determines that roads in areas exceeding threshold levels cannot be used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a driving support method, an on-board unit, and a service server for extracting unavailable roads and traffic jam prediction roads based on weather prediction information and natural disaster prediction information, and performing driving support for users.

  Conventionally, in a road information system, traffic jam information, required time through roadside communication devices (radio beacons, light beacons) installed mainly on expressways, urban expressways, major public roads in and around urban areas, and urban areas Road traffic information such as speed control information due to an accident car or construction is provided to the road user by displaying it on the screen of the corresponding on-board unit.

  Also, the spread of ITS spot-compatible in-vehicle devices using DSRC (Dedicated Short Range Communications, DSRC) as a wireless communication method with a radio wave beacon is in progress. Compared to conventional on-board units, ITS spot-compatible on-board units can communicate at high speed and with a large capacity, and can therefore 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 service area are performed. Further, as disclosed in Patent Document 1, a technology of connecting a smartphone to an ITS spot compatible in-vehicle system and displaying an image for navigation generated in the smartphone on a display device of the in-vehicle system is also in widespread use.

JP, 2014-85844, A

  In conventional ITS spot service systems, in addition to current traffic congestion information, falling objects, traffic regulation information due to accidents, etc., weather information such as precipitation, earthquakes, tsunami occurrence information, heavy traffic and information on traffic closure due to freezing etc. providing.

  However, based on future weather forecast information and natural disaster forecast information, it has not been conducted to extract dangerous roads that should be avoided and provide the information to users, and users are The route could only be determined based on weather information and natural disaster information. Also, in dynamic route guidance, route search considering future weather forecast information and natural disaster forecast information was not performed.

  In recent years, landslides and flooding of rivers frequently occur due to local heavy rain, and road use availability information based on current and future weather forecast information and natural disaster forecast information as safe driving support for road users And route search is desired. In addition, although information on the water level and flooding of the river is provided from the river system of the Ministry of Land, Infrastructure, Transport and Tourism, it has not been incorporated into the ITS spot service system and has not been utilized.

  The present invention has been made to solve the above-mentioned problems, and based on weather forecast information and natural disaster forecast information, it is determined whether or not it is possible to use the road for several hours ahead, and traffic jams on the road can be determined. An object of the present invention is to provide a driving support method, an on-board unit, and a service server which predicts and supports driving of a road user.

The driving support method according to the present invention includes weather information including weather prediction information and natural disaster information including natural disaster prediction information as road use determination information used to determine whether the road can be used for several hours ahead. A road use determination information collection step of collecting and storing the collected road use determination information in the storage means, a road use determination information extraction step of extracting the road use determination information from the storage means, and the extracted road use determination information Road availability determination step of determining whether to use the road based on the acquired road usage determination information and predicting traffic congestion of the road, and extracting the unavailable road and the traffic congestion prediction road, and , And a display step of displaying the extracted unavailable road and the traffic congestion prediction road, and the road is not There is a congestion determination threshold setting table in which the threshold level of the predicted road use determination information is set, and the acquired level of the road use determination information is compared with the threshold level of the congestion determination threshold setting table. The road is extracted as the traffic congestion prediction road.
Further, the vehicle-mounted device according to the present invention includes a service server that collects and stores natural disaster information including weather information and natural disaster prediction information including weather prediction information as road use determination information, and wireless communication via a roadside communication device. It is an in-vehicle device which communicates, and based on the road use determination information acquired by the road use determination information acquiring means for acquiring the road use determination information received through the roadside communication device and the road use determination information acquiring means, To determine the availability of the road and predict the traffic congestion of the road, and to display the unavailable road and the congestion predicted road extracted by the road availability determination means for extracting the unavailable road and the traffic congestion predicted road Means for the road availability determination means to set a threshold level table of the road usage determination information in which it is predicted that the road is congested. The a, a level of road usage determination information road usage determination information acquisition unit acquires compared to a threshold level of congestion determination threshold setting table and extracts the road or above a threshold level of area as the traffic jam estimation road.
In addition, the service server according to the present invention is a service server that communicates with an on-vehicle device mounted on a vehicle and wireless communication via a roadside communication device, and determines the availability of the road for several hours from now. A road that collects weather information including weather forecast information and natural disaster information including natural disaster forecast information from an external system as a road use determination information to be used from the external system and stores the collected road use determination information in a storage means A road use judgment information extraction means for extracting the road use judgment information from the use judgment information collection means and the storage means and transmitting it to the vehicle-mounted device via the roadside communication device, the road use being extracted by the road use judgment information extraction means In the determination information, a threshold used to determine the road availability and a threshold used to predict congestion on the road are separately set.

  According to the driving support method according to the present invention, weather information including weather prediction information and natural disaster information including natural disaster prediction information are collected as road usage determination information, and road usage can be performed several hours ahead from the present As road traffic congestion is to be predicted, road users are required to avoid the roads for which danger is predicted and the roads for which traffic congestion is predicted based on future weather predictions and natural disaster predictions. 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, a warning level setting table. It is a figure which shows the lightning in the ITS spot service system which concerns on Embodiment 1 of this invention, a tornado level setting table. It is a figure which shows the tsunami warning in the ITS spot service system which concerns on Embodiment 1 of this invention, a warning level setting table. It is a figure which shows the sediment disaster 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 eruption caution level setting table of the volcano 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 availability determination 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 decision processing in the ITS spot corresponding | compatible on-vehicle device 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 ITS spot corresponding | compatible on-board unit based on Embodiment 1 of this invention. It is a figure which shows the flow of the route guidance process in the ITS spot corresponding | compatible on-board unit based on Embodiment 2 of this invention. It is a figure which shows the road availability decision result in the ITS spot corresponding | compatible on-board unit based 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 | compatible on-board unit based on Embodiment 2 of this invention.

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

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

  The vehicle position information acquiring unit 32 of the server 3 acquires the vehicle position information transmitted from the first wireless communication unit 11 of the vehicle-mounted device 1 to the second wireless communication unit 21 through the third wireless communication unit 31. Do. The road use determination information collection means 33 uses natural disaster information including weather information including weather forecast information and natural disaster prediction information as road use determination information used to determine whether or not the road can be used several hours ahead from now. , Collect from the external system via the network 4.

  The external system is, for example, a short-time precipitation forecast of the Meteorological Agency 51 or radar / nowcast, a river system or road system of the Ministry of Land, Infrastructure and Transport 52, or a private weather information service company 53 or the like. Further, the road use determination information collecting means 33 stores the collected road use determination information in the storage means 34.

  The weather information collected as road use determination information includes at least one of precipitation information, precipitation prediction information, a weather special warning, a weather warning, a weather warning, and the like. In addition, natural disaster information collected as road use judgment information includes: large tsunami warning, tsunami warning, tsunami warning, landslide disaster warning information, volcano eruption warning information, commentary information on the status of volcanoes, and river flood forecast It 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 the road use determination information 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 means 35 may be information of an area including all the roads managed by the management center 300, and the vehicle position acquired by the vehicle position information acquisition means 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.

  In addition, the vehicle position information detection means 12 of the vehicle-mounted device 1 detects vehicle position information including the 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 means 13 acquires the road use determination information received by the first wireless communication means 11 via the second wireless communication means 21 and is temporarily stored in the second storage means (not shown). save.

  The road availability determination means 14 determines the availability of the road usage based on the road usage determination information acquired by the road usage determination information acquisition means 13 and extracts the unavailable road. The road availability determination unit 14 has a threshold setting table (see FIG. 9) in which the threshold level of the road usage determination information that determines that the road usage is not possible is set. When determining whether to use the road, the level of the weather information and the natural disaster information included in the road use determination information acquired by the road use determination information acquiring means 13 is compared with the threshold level of the threshold setting table, It is determined that the roads in the area are not available.

  The unavailable road extracted by the road availability determination means 14 is a dangerous road which is likely to be traffic regulation, speed regulation, or traffic blocking in the future. Even if it is possible to pass, there is a possibility that traffic jams may occur and safe driving may not be ensured, and it is a road that should be avoided.

  In addition, the road availability determination means 14 determines the availability of the road every predetermined time from the present to several hours ahead, and extracts the unavailable road every time. The predetermined time is set in advance, and is set to be, for example, an interval of 15 minutes every hour on the hour, 15 minutes, 30 minutes, 45 minutes, or 5 minutes in case of abnormality such as heavy rainfall, for example.

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

  In the ITS spot service system according to the first embodiment, specific examples of the road use determination information used for determining whether the road can be used are shown in FIGS. Further, FIG. 9 shows a threshold setting table in which the threshold level of the road use determination information is set. Each of the weather information and the natural disaster information included in the road use determination information has the level 1, the level 2,.

  FIG. 2 shows a precipitation level setting table in which the level is set for the precipitation obtained from the Meteorological Agency 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 where a road becomes like a river is 30 mm / hr or more and 50 mm / hr or less as level 3 as a threshold.

  Radar-nowcast displays precipitation intensity distribution observation every 5 minutes by meteorological radar, and precipitation intensity distribution prediction to 60 minutes ahead every 5 minutes by precipitation nowcast continuously. By matching the level setting in the precipitation level setting table shown in FIG. 2 with the setting of the precipitation intensity in the radar and nowcast, it is possible to divert the precipitation information by the radar and nowcast as it is.

  Further, FIG. 3 shows a weather warning announced from the Japan Meteorological Agency, a weather warning having a level 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 one of level 1 to level 3, and in the warning, the dense fog warning is set to level 2 and the others are set to level 1. Also, special warning (heavy rain, storm, heavy snow, heavy snow) with a particularly high degree of danger is level 3, warning (heavy rain, flood, storm, heavy snow, heavy snow) with level 2 and level 2 is a threshold.

  FIG. 4 shows a lightning and tornado level setting table for which the level is set for lightning and 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 (the threshold setting table for FIG. 9 omits the threshold for lightning and tornado information).

  FIG. 5 shows a tsunami warning issued from the Japan Meteorological Agency, a tsunami warning with a level 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 a threshold of 3 is a threshold of 3 to 5 m of the large tsunami warning predicted. The tsunami warning and the warning are used to determine the availability of roads in the coastal area.

  FIG. 6 shows a sediment disaster alert level setting table in which levels are set for sediment disaster alert information (mesh information) announced by the Japan Meteorological Agency. Earth and sand disaster alert judgment mesh information classifies the area where the risk of earth and sand disaster occurrence is increasing in 5 steps in 5km grid units, and updates it every 10 minutes, 1 hour ahead, 2 hours ahead We also make predictions. In the example shown in FIG. 6, the level 3 which is an area exceeding the soil rainfall index standard of the heavy rain warning is used as the threshold.

  Further, FIG. 7 shows a volcano eruption alert level setting table for which a level is set for volcano eruption alert information announced by the Japan 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 a threshold. Volcano eruption alert information is used to determine the availability of roads near the volcano. Note that whether to use the road may be determined based on commentary information on the status of the volcano announced by the Japan 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 level 3 of the flooding danger information announcement is set as the threshold. Flood forecasting is used to determine the availability of roads near rivers. In addition, rainfall data and water level data by telemetry can also be acquired from the river system.

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

  Subsequently, in step 4 (S4), the road availability determination unit 14 sets the precipitation (prediction) level for each area at the predetermined time obtained 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 threshold level is equal to or higher than the road use of the area is not permitted, 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 determination means 14 acquires the weather warning and the warning included in the road use determination information, and when the weather warning or the warning is being issued, the process proceeds to step 6 (S6), and the weather warning and warning If there is an area where the information level is equal to or higher than the threshold level, it is determined that the road use of the corresponding area is not possible, and the process proceeds to step 7 (S7). In S5, when there is no order, it progresses to S7 as it is.

  Subsequently, in S7, the road availability determination unit 14 acquires the large tsunami warning and the tsunami warning included in the road usage determination information, and proceeds to step 8 (S8) when the large tsunami warning or the tsunami warning is being issued. When there is an area where the level of the large tsunami warning or the tsunami warning is equal to or higher than the threshold level, it is determined that the road use of the corresponding area is not possible, and the process proceeds to step 9 (S9). In S7, when there is no order, it progresses to S9 as it is.

  In S9, the road availability determination means 14 acquires the earth and sand disaster caution information included in the road use judgment information, and proceeds to step 10 (S10) when the earth and sand disaster caution information is being issued, and the level of the earth and sand disaster caution information When there is an area above the threshold level, it is determined that the road use of the corresponding area is not possible, and the process proceeds to step 11 (S11). In S9, when there is no order, it progresses to S11 as it is.

  Subsequently, in S11, the road availability determination means 14 acquires volcanic eruption alert information included in the road usage determination information, and proceeds to step 12 (S12) if volcanic eruption alert information is being issued, and the volcano If there is an area where the level of eruption alert information is equal to or higher than the threshold level, it is determined that the road use of the corresponding area is not possible, and the process proceeds to step 13 (S13). In S11, when there is no order, it progresses to S13 as it is.

  In S13, the road availability determination means 14 acquires the flood forecast of the river included in the road usage determination information, and if the flood forecast is being issued, the process proceeds to step 14 (S14) and the level of the flood forecast is equal to or higher than the threshold level If there is an area, it is determined that the road use of the corresponding area is not possible, and the process proceeds to step 15 (S15). In S13, when there is no order, it progresses to S15 as it is. In S15, the road availability determination unit 14 extracts an unavailable road for each time based on the determination results of S2 to S14, and ends the processing.

  An example in which the unusable road extracted by the above road availability judgment processing is displayed on the display means 16 is shown in FIG. In the example shown in FIG. 11, a danger area in which the predicted precipitation amount at 13:00, 13:30, and 14:00 exceeds the threshold level is displayed, and the road A included in the danger area is highlighted as an unusable road. Is displayed. Thereby, the road user can avoid the road A and can decide a route.

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

  As described above, according to the ITS spot service system according to the first embodiment, the weather information including weather prediction information and the natural disaster information including natural disaster prediction information are transmitted from the external system to the network 4 as road use determination information. Because the road users are asked to decide whether or not to use the road several hours ahead from now, road users are expected to use the road where the danger is predicted based on the future weather forecast and natural disaster forecast. It will be possible to determine the route avoiding, and safe driving will be supported.

  Also, compared with the conventional system that provided the weather information and natural disaster information provided from the external system to the road user as it is, this system extracts the unavailable road and presents it to the road user. Because it is not necessary for the user to determine which road is dangerous, it is safe driving support that is highly convenient for the user.

Second Embodiment
In the ITS spot service system according to the second embodiment of the present invention, the road availability determination process described in the first embodiment is applied in combination with the route guidance by the route search means 15 of the vehicle-mounted device 1. Since the configuration of the ITS spot service system according to the second embodiment is the same as that of the first embodiment, FIG. 1 is used and the detailed description is omitted.

  In the second embodiment, the road availability determination unit 14 calculates the passage time of the vehicle 100 on the road extracted by the route search unit 15, and the point on the road at each passage time corresponds to the unavailable road. In this case, the road is excluded from route search.

  The flow of the route guidance process in the route search means 15 of the vehicle-mounted device 1 according to the second embodiment will be described using 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 of route 1 and route 2 are extracted.

  In step 23 (S23), the road usage determination information acquisition means 13 acquires road usage determination information. Subsequently, in step 24 (S24), the road availability determination unit 14 performs road availability determination based on the road usage determination information acquired in S23. In addition, since the road availability determination process of S24 is the same process as S2-S15 of the flowchart of FIG. 10, description is abbreviate | omitted here.

  Subsequently, in step 25 (S25), as a result of the road availability determination process in S24, when there is an availability determination (YES), the process proceeds to step 26 (S26), and a route whose unavailable route is an extracted road of route guidance It is determined whether it corresponds to 1 or 2 route. If the unavailable 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 passing time determined in S27 can not be used. If it is determined in S28 that the road is not usable (YES), the process proceeds to step 29 (S29) to notify that the road is dangerous and to exclude the corresponding route from the route guidance. Note that when the dangerous place is in the vicinity area, voice notification may be performed.

  On the other hand, if there is no use judgment in S25 (NO), the unusable road does not correspond to the extracted road of the route guidance in S26 (NO), and the corresponding point of the road at the passing time is available in S28 ( In step 30 (S30), normal route guidance is performed on the extracted route candidate.

  FIG. 13 shows the result of the road availability determination processing in the case where the unavailable road corresponds to Route 2 which is an extracted road of route guidance, and FIG. 14 shows a display example of the route guidance in the display means 16. In the example shown in FIG. 13, in Route 2, passing points A, B, C, and D at 13:30, 13:45, 14:00, and 14:15 respectively. Is determined by calculation.

  FIG. 13 shows the level of the road use determination information at each passage time point. The precipitation level is equal to or higher than the threshold at point C at 14:00 and point D at 14:15, which corresponds to the road being unusable. Accordingly, the route 2 is excluded from the route guidance, and the route 1 not corresponding to the unavailable road is the route guidance.

  According to the second embodiment, in addition to the same effects as those of the first embodiment, it becomes possible to perform route search based on future weather forecast information and natural disaster forecast information, and the safe driving of the road user is achieved. Support will be further enhanced with convenience.

Third Embodiment
In the first and second embodiments described above, the unavailable road is extracted based on the road usage determination information including weather information and natural disaster information, but in the third embodiment, the road usage determination information is used for the road Traffic congestion prediction and provide road users with traffic congestion prediction information. Since the configuration of the ITS spot service system according to the third embodiment is the same as that of the first embodiment, FIG. 1 is used and the detailed description is omitted.

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

  In the third embodiment, a threshold used for traffic congestion prediction is set separately from the threshold used for the determination of road availability. The road availability determination means 14 has a traffic congestion determination threshold setting table (not shown) in which the threshold level of the road usage determination information where traffic congestion is predicted to occur on the road is set. In addition, it is not necessary to set a threshold value about natural disaster information considered to be unrelated to traffic congestion.

  The road availability determination means 14 compares the level of the road use determination information acquired by the road use determination information acquisition means 13 with the threshold level of the traffic congestion determination threshold setting table, and extracts the road in the area above the threshold level as the traffic congestion prediction road. Do. The extracted traffic jam prediction road is displayed on the display means 16 in distinction from the unavailable road.

  In the third embodiment, when route guidance is performed by the route search means 15, 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 upper point corresponds to an unusable road or a traffic congestion prediction road. When it corresponds, it displays on the display means 16 that the extracted road is an unusable road or a traffic jam prediction road.

  According to the third embodiment, in addition to the same effects as the first embodiment and the second embodiment, the traffic congestion of the road is predicted on the basis of the road usage determination information. It becomes possible to avoid the road and to select the road, and the convenience is further improved. In the present invention, within the scope of the invention, each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted.

  The present invention can be used as an ITS spot compatible on-vehicle unit of an ITS spot service system and an ITS spot service server.

1 ITS spot compatible vehicle, 2 radio beacons,
3 ITS spot service servers, 4 networks,
11 first wireless communication means, 12 vehicle position information detecting 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 acquiring 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)

Weather information including weather forecast information and natural disaster information including natural disaster forecast information are collected as road use determination information used to determine whether or not the road can be used several hours ahead, and the road usage determination information collected A road use determination information collecting step of storing
A road use determination information extraction 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;
A road availability determination step of determining the availability of the road usage and predicting the traffic congestion of the road based on the acquired road usage determination information, and extracting the unavailable road and the traffic congestion prediction road;
Including a display step of displaying the extracted unavailable road and the traffic congestion predicted road,
The traffic availability determination step includes a traffic congestion determination threshold setting table in which a threshold level of the road usage determination information in which the traffic is predicted to be congested is set, and the acquired traffic usage determination information is set to the traffic congestion determination threshold setting table. A driving assistance method characterized by extracting a road in an area above the threshold level as a traffic jam prediction road in comparison with a threshold level.   Vehicle position information detecting step of detecting vehicle position information including latitude / 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; 2. 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 means.   The road use determination step includes a threshold setting table in which a threshold level of road use determination information for determining road use as unacceptable is set, and the acquired level of the road use determination information is compared with the threshold level of the threshold set table. 3. The driving support method according to claim 1, wherein it is determined that road use in an area above the threshold level is not possible.   The meteorological information collected as the road usage determination information in the road usage determination information collecting step is characterized in that it includes at least one of precipitation information, precipitation forecast information, a weather special warning, a weather warning, and a weather warning. The driving assistance method according to any one of claims 1 to 3, wherein the driving assistance is performed.   Natural disaster information collected as road use determination information in the road use determination information collecting step includes large tsunami warning, tsunami warning, tsunami warning, landslide disaster warning information, volcanic eruption warning information, and river flood forecasting. The driving assistance method according to any one of claims 1 to 4, comprising at least one.   The road availability determination step determines the availability of the road for every predetermined time from the present to the next several hours, and extracts the unavailable road for every time. The driving support method according to any one of the items.   The route searching step of searching for a route from the current location to the destination is included, and in the road availability determination step, the passing time of the vehicle on the road extracted in the route searching step is calculated, and on the road at each passing time The driving support method according to claim 6, wherein when the point corresponds to an unusable road, the road is excluded from route search. An on-board unit that communicates by wireless communication via a roadside communication device with a service server that collects and stores natural disaster information including weather information including natural weather prediction information and natural disaster prediction information as road use determination information,
Road use determination information acquisition means for acquiring the road use determination information received via the roadside communication device;
Road availability determination means for determining the availability of the road usage and predicting the traffic congestion of the road based on the road usage determination information acquired by the road usage determination information acquisition means, and extracting the unavailable road and the traffic congestion forecast road,
It has display means for displaying the unavailable road and the traffic jam predicted road extracted by the road availability determination means,
The road availability determination means has a traffic congestion determination threshold setting table in which a threshold level of the road usage determination information in which the road is predicted to be congested is set, and the level of the road usage determination information acquired by the road usage determination information acquisition means And a road in an area above the threshold level is extracted as a traffic jam prediction road.   It has vehicle position information detecting means for detecting vehicle position information including latitude longitude information and time information of the own vehicle, and the detected vehicle position information is to be transmitted to the service server via the roadside communication device. The vehicle-mounted device according to claim 8, characterized in that:   The road availability determination means has a threshold setting table in which a threshold level of road usage determination information for determining road usage as unacceptable is set, and the level of the road usage determination information acquired by the road usage determination information acquiring means is The vehicle-mounted device according to claim 8 or 9, wherein it is determined that the road use of the area above the threshold level is not possible by comparing with the threshold level of the threshold setting table.   The road availability determination means determines availability of a road for every predetermined time from the present to several hours ahead, and extracts an unavailable road for each time. Vehicle-mounted device according to one item.   A route search means for searching for a route from the current location to a destination is provided, and the road availability determination means calculates passing times of the vehicle on the road extracted by the route searching means, and The vehicle-mounted device according to claim 11, wherein when the point corresponds to an unusable road, the road is excluded from route search. A service server that communicates with an on-vehicle device mounted on a vehicle and wireless communication via a roadside communication device,
Weather information including weather forecast information and natural disaster information including natural disaster forecast information are collected from the external system via the network as road use determination information used to determine the availability of roads for several hours ahead. A road use determination information collecting means for storing the collected road use determination information in a storage means;
Road usage determination information extraction means for extracting road usage determination information from the storage means and transmitting the road usage determination information to the vehicle-mounted device via the roadside communication device,
A service server characterized in that the road use determination information extracted by the road use determination information extracting means is set separately for each of a threshold used to determine the road availability and a threshold used to predict traffic congestion on the road.   The road use determination information extraction means specifies the related area of the vehicle based on the vehicle position information received via the roadside communication device, and extracts the road use determination information of the related area from the storage means. The service server according to claim 13, characterized in that:   The weather information collected as road use determination information by the road use determination information collecting means is characterized in that it includes at least one of precipitation information, precipitation forecast information, a weather special warning, a weather warning, and a weather warning. 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 at least a large tsunami warning, a tsunami warning, a tsunami warning, a landslide warning information, a volcano eruption warning information, and a river flood forecast. The service server according to any one of claims 13 to 15, comprising one.

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