JP5083264B2 - Traffic information distribution system - Google Patents

Description

  The present invention relates to a traffic information distribution system that collects probe data such as position and speed from a running vehicle, generates traffic information indicating the degree of traffic congestion on the road, and distributes the generated traffic information to the vehicle. .

  Conventionally, there has been a traffic information distribution system that collects probe data such as position and speed from a vehicle on which the center is traveling, generates traffic information indicating the degree of traffic congestion on the road, and distributes the generated traffic information to the vehicle. In addition, the navigation system described in Patent Document 1 uses a point information code including latitude and longitude in order to present information to the user through display means and voice output means.

Japanese Patent Laid-Open No. 11-14384

  However, in the traffic information distribution system, when coordinates (latitude, longitude) are used as information indicating the position of the traffic information to be distributed, if the direction of link definition of the traffic information is different between the center side and the vehicle side, all directions are The traffic information may be reversed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a traffic information distribution system that can suppress a direction error in traffic information.

In order to achieve the above object, the traffic information distribution system according to claim 1,
In-vehicle equipment that is installed in a vehicle and transmits probe data including coordinates, speed, and direction indicating the position of the vehicle, and traffic information that indicates the degree of traffic congestion on the road by collecting probe data from multiple in-vehicle equipment A traffic information distribution system including an information center that generates and distributes the generated traffic information to a plurality of in-vehicle devices,
The traffic information includes coordinates indicating the position of the end of the traffic jam indicated by the traffic information, and information on the direction in which the traffic jam occurs with respect to the coordinates,
A determination means for determining whether or not the traffic congestion is eased toward a traffic congestion prediction point set in advance based on the traffic information;
When it is determined by the determination means that the traffic congestion is mitigated toward a preset traffic congestion prediction point, a direction conversion means for reversing the direction of the traffic information,
It is characterized by providing.

  Usually, a traffic jam occurs toward a point where congestion is predicted such as an intersection, a point where a vehicle leaves the road, or a point where a vehicle flows into the road. In other words, it occurs on the downstream side (opposite to the traveling direction) with respect to the point where the above-mentioned congestion is predicted. Therefore, in the case of traffic information indicating that traffic congestion is eased toward a point where congestion is predicted, there is a high possibility that the direction is reversed (incorrect).

  Therefore, based on the traffic information, if it is determined that the traffic congestion is mitigated toward a preset traffic congestion prediction point, the direction of the traffic information is reversed to suppress the direction error in the traffic information. Can do.

In order to achieve the above object, the traffic information distribution system according to claim 2
In-vehicle equipment that is installed in a vehicle and transmits probe data including coordinates, speed, and traveling direction indicating the position of the vehicle, and traffic information that indicates the degree of traffic congestion by collecting probe data from multiple in-vehicle equipment And a traffic information distribution system including an information center that distributes the generated traffic information to a plurality of in-vehicle devices,
The traffic information includes coordinates indicating the position of the end of the traffic jam indicated by the traffic information, and information on the direction in which the traffic jam occurs with respect to the coordinates,
Based on the probe data, a determination unit that determines whether or not the traffic congestion is eased toward a traffic congestion prediction point set in advance,
When it is determined by the determination means that the traffic congestion is mitigated toward a preset traffic congestion prediction point, direction changing means for reversing the direction of the probe data,
It is characterized by providing.

  Usually, a traffic jam occurs toward a point where congestion is predicted such as an intersection, a point where a vehicle leaves the road, or a point where a vehicle flows into the road. In other words, it occurs on the downstream side (opposite to the traveling direction) with respect to the point where the above-mentioned congestion is predicted. Therefore, in the case of probe data indicating that traffic congestion is eased toward a point where congestion is predicted, there is a high possibility that the direction is reversed (incorrect). In addition, there is a high possibility that the traffic information generated from the probe data whose direction is reversed is also reversed (incorrect).

  Therefore, based on the probe data, if it is determined that the traffic congestion is mitigated toward a preset traffic congestion prediction point, the direction of the traffic information is suppressed by reversing the direction of the probe data. Can do.

  Moreover, as shown in Claim 3 and Claim 4, a determination means and a direction change means may be provided in an information center, and may be provided in vehicle equipment.

It is a block diagram which shows schematic structure of the traffic information delivery system in embodiment of this invention. It is a block diagram which shows schematic structure of the information center in embodiment of this invention. It is an image figure which shows an example of a traffic condition. It is an image figure at the time of displaying traffic information with the traffic information delivery system in a comparative example. It is an image figure at the time of displaying traffic information with the traffic information delivery system in embodiment of this invention. It is a block diagram which shows schematic structure of the information center in the modification of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The traffic information distribution system in the present embodiment includes a navigation device 1 as an in-vehicle device mounted on a vehicle M and an information center 2 provided outside the vehicle. The navigation device 1 and the information center 2 are configured to be communicable via a mobile communication network. The information center 2 is configured to be able to communicate with a plurality of navigation devices 1. That is, the information center 2 and the navigation apparatus 1 have a 1-to-N relationship (N: 2 or more).

  In the traffic information distribution system, the navigation device 1 transmits probe data including coordinates, speed, and direction indicating the position of the vehicle M, and the information center collects probe data from a plurality of navigation devices 1 to determine the degree of traffic congestion on the road. Is generated, and the generated traffic information is distributed to a plurality of navigation devices 1.

  First, the navigation device 1 (corresponding to the in-vehicle device of the present invention) will be described. As shown in FIG. 1, the navigation device 1 includes a position detector 4, a map data input device 5, an operation switch group 6, a transceiver 7, an external memory 8, a display device 9, a voice controller 10, a voice recognition device 11, and a remote controller. A sensor 12, a speaker 13, a microphone 14, a remote control terminal (also referred to as a remote controller in the drawings and the following description) 15, a vehicle speed sensor 16, and a control unit 3 to which these devices are connected are provided. The navigation device 1 of the present invention transmits probe data to the information center 2 in addition to a conventional navigation function such as route guidance based on a signal indicating a destination input from the operation switch group 6 or the like. Or the traffic information (degree of traffic jam) transmitted from the information center 2 is displayed on the display device 9.

  The control unit 3 is configured as a normal microcomputer, and includes a peripheral CPU, ROM, RAM, I / O, and a bus line (all not shown) for connecting these configurations. The control unit 3 is based on various signals and data input from the position detector 4, the map data input device 5, the operation switch group 6, the external memory 8, the transceiver 7, the voice controller 10, the remote control sensor 12, and the vehicle speed sensor 16. Various processing (for example, map scale change processing, menu display selection processing, destination setting processing, route search execution processing, route guidance start processing, current position correction processing, image display processing, volume adjustment processing, destination candidate search processing, Current position specifying process, speed acquisition process, etc.).

  In addition, the control unit 3 sends probe data having coordinates, directions (traveling direction of the vehicle M), speed (vehicle speed), and vehicle ID as one unit from the transceiver 7 via the mobile communication network to the information center 2. The traffic information distributed from the information center 2 is received via the transmitter / receiver 7. The controller 3 displays the received traffic information superimposed on the road link of the map data acquired from the map data input device 5. In addition, the control unit 3 periodically generates the probe data to be transmitted from the information center 2 by using a known technique such as map matching from a signal input from the position detector 4 and periodically the current position and direction of the vehicle M. (Current position specifying process) and a detection signal from the vehicle speed sensor 16 are acquired (speed acquiring process). In other words, the probe data is information (current status information) indicating the current status of the vehicle M.

  The position detector 4 is a GPS receiver for GPS (Global Positioning System) that detects the current position of the vehicle M based on the surrounding geomagnetic sensor 4a, gyroscope 4b, distance sensor 4c, and radio waves from the satellite. 4d. Since these sensors 4a to 4d have errors of different properties, they are configured to be used while being complemented by a plurality of sensors. Depending on the accuracy, a part of the above may be used, and further, a steering rotation sensor, a vehicle sensor for each rolling wheel, or the like may be used.

  The map data input device 5 is mounted with a storage medium (not shown) and stored in the storage medium for map matching data for improving the accuracy of position detection, map data (including link data and node data), landmarks It is a device for inputting various data including data and facility data. As a storage medium for these various data, for example, a CD-ROM, DVD-ROM, memory card, HDD or the like can be used.

  As the operation switch group 6, for example, a touch switch integrated with the display device 9, a mechanical switch, or the like can be employed. When the switch is operated, the operation switch group 6 performs various processing (for example, map scale change processing, menu display selection processing, destination setting processing, route search execution processing, route guidance start processing, current position) to the control unit 3. Correction processing, image display processing, volume adjustment processing, destination candidate search processing, current position identification processing, speed acquisition processing, etc.) and execution of various information. The remote controller 15 is provided with a plurality of operation switches (not shown). When these switches are operated, the remote controller 15 instructs the control unit 3 to execute various functions and inputs various information. Or That is, the operation switch group 6 and the remote controller 15 (remote control sensor 12) input a signal instructing execution of various functions and a signal indicating various information to the control unit 3 in accordance with the switch operation. It should be noted that the operation switch group 6 and the remote controller 15 can cause the control unit 3 to execute the same function or input the same information by any switch operation.

  For example, when a signal indicating a destination and a signal indicating a destination setting or route search instruction are input from the remote control sensor 12 or the operation switch group 6 via the remote controller 15, the control unit 3 detects the position detector. Using the signal from 4 and the data from the map data input device 5, the destination is set and the current position is detected, and the optimum route from the current position to the destination is automatically searched to guide the route. Set. As a method for automatically setting an optimum guide route, a method such as the Dijkstra method is known. The set guide route is displayed on the map displayed on the display device 9 on the basis of the data of the map data input device 5 together with the current position mark indicating the current position detected by the position detector 4. Is done. The display device 9 can also display other information such as traffic information as described above in addition to the current position mark and guide route on the display map.

  The external memory 8 can employ a writable mass storage device such as an HDD. The external memory 8 stores a large amount of data and data that should not be erased even when the power is turned off, or frequently used data is copied from the map data input device 5 and used. is there. The external memory 8 may be a removable memory having a relatively small storage capacity.

  The display device 9 performs a navigation screen display for displaying a map for guiding the travel of the vehicle M, a guide route, traffic information, and the like based on a signal from the control unit 3, and a full color display is provided. It can be configured using a liquid crystal display, an organic EL display, a plasma display, or the like.

  The transceiver 7 is a device that receives traffic information and the like distributed from the information center 2 provided outside, and transmits probe data and the like to the information center 2. The transceiver 7 receives the traffic information and the like and inputs them to the control unit 3.

  The speaker 13 outputs voice data output from the voice controller 10 based on signals from the control unit 3 and the voice recognition device 11 (for example, guidance voice at the time of route guidance, destination candidate and destination candidate setting confirmation, or traffic information). Etc.).

  The microphone 14 inputs the voice uttered by the operator to the voice recognition device 11 as an electrical signal. The voice recognition device 11 collates the operator's input voice uttered through the microphone 14 with lexical data (comparison target pattern) in a recognition dictionary (not shown) stored therein, and has the highest degree of coincidence. Is input to the voice controller 10 as a recognition result.

  The voice controller 10 controls the voice recognition device 11 and controls talkback output (voice output) through the speaker 13 for an operator who has input voice. Moreover, the process etc. which input the recognition result of the speech recognition apparatus 11 to the control part 3 are also performed. The control unit 3 to which the recognition result of the voice recognition device 11 is input via the voice controller 10 is used to perform various processes (for example, map scale change process, menu display selection process, Setting processing, route search execution processing, route guidance start processing, current position correction processing, image display processing, volume adjustment processing, destination candidate search processing, current position identification processing, speed acquisition processing, and the like).

  The vehicle speed sensor 16 detects a speed from the rotational speed of each rolling wheel of the vehicle M, and inputs a detection signal indicating the speed to the control unit 3.

  Next, the information center 2 will be described with reference to FIG.

  The information center 2 collects probe data from a plurality of navigation devices 1 as described above, generates traffic information indicating the degree of traffic congestion on the road, and distributes the generated traffic information to the plurality of navigation devices 1. The system can be divided into a probe data collection system and a traffic information distribution system.

  The collection system of the information center 2 includes a collection server that collects probe data from the navigation devices 1 mounted on a plurality of vehicles M and generates traffic information, and a transmission server that transmits the traffic information to a distribution system. Is. When the collection system of the information center 2 is represented by functional blocks, a data collection unit 21a, an estimation complement processing unit 21b, a current state DB (current state database) 21c, a statistical DB (statistical database) 21d, a prediction processing unit 21e, a traffic information storage unit 21f, the information transmission part 21g, etc. are provided.

  On the other hand, the distribution system of the information center 2 receives traffic information such as a receiving server that receives the traffic information transmitted from the collection system, a direction determination process of the traffic information, and a direction conversion process that reverses the direction as necessary. It includes a distribution server for distribution. When the distribution system of the information center 2 is represented by functional blocks, the information center 2 includes an information reception unit 22a, a direction conversion processing unit 22b, an information distribution unit 22c, and the like.

  Any server (for example, a collection server) of the information center 2 is not shown in the figure, but includes various data including map matching data, map data (including link data and node data), landmark data, and facility data. A storage unit for storing data is provided. In addition, the storage unit stores position data relating to a traffic jam prediction point for determining whether or not the traffic information traffic direction is correct. This traffic jam predicted point is a point where traffic jam is predicted. For example, at locations where vehicles M turn right or left such as intersections, entrances to facilities (supermarkets, parking lots, etc.), station roundabouts, interchange entrances, tunnel entrances, sag sections (concaves that run from downhill to uphill), etc. Congestion is likely to occur. That is, it can be predicted that a traffic jam will occur at such a point (position). Therefore, in the present embodiment, the position data of a point where such a traffic jam is predicted is stored in the storage unit as a traffic jam predicted point. Of the above-mentioned points, only position data of a point with a high traffic congestion and congestion rate may be stored as a traffic jam prediction point.

  Here, an example of traffic information creation processing by the information center 2 having such a configuration will be described.

  When the collection server of the collection system in the information center 2 receives the probe data transmitted from the plurality of navigation devices 1 by the data collection unit 21a, the collection server of the collection system performs an estimation complement process on the probe data received by the estimation complement processing unit 21b. The current status information indicating the degree of traffic jam in the current status is generated and stored in the current status DB 21c. In addition, using the statistical DB 21d that statistically processes the coordinates, direction, and speed included in the probe data to create a database, the prediction processing unit 21e performs a traffic jam prediction process to indicate the degree of traffic jam predicted. Generate prediction information. That is, the current status information is traffic information indicating the degree of traffic jam in the current status, and the prediction information is traffic information indicating the predicted level of traffic jam.

  Then, the collection server of the information center 2 includes the current status information stored in the status DB 21, the prediction information generated by the prediction processing unit 21e, the coordinates indicating the position (the coordinates indicating the position of the end of the traffic jam), the direction The traffic information including (the direction in which the traffic jam occurs with respect to the coordinates) is generated and stored in the traffic information storage unit 21f.

  The level of the above-mentioned traffic jam is expressed as “traffic” indicating that the traffic is heavy, “crowded” indicating that the traffic is intermediate, “empty road” indicating that the traffic is low, etc. be able to. Further, when the degree of the traffic jam is specified, if the vehicle speed extracted from the probe data is “less than 10 km / h”, the road including the coordinates extracted from the probe data is specified as “traffic jam”. If the vehicle speed extracted from the probe data is “less than 20 km / h”, the road including the coordinates extracted from the probe data is identified as “congested”. If the vehicle speed extracted from the probe data is “20 km / h or more”, the road including the coordinates extracted from the probe data is identified as “empty road”.

  Further, in the navigation device 1, when displaying traffic information on the display device 9, the level of traffic jam (“traffic jam”, “congested”, “empty road”) is set so that the level of this traffic jam can be visually recognized. The display form is changed accordingly. For example, the color of the arrow to be displayed and / or the thickness of the arrow is changed according to the degree of traffic jam. When changing the color of the arrow to be displayed, for example, the congestion is red, the congestion is yellow, and the empty road has no arrows. When changing the thickness of the arrow to be displayed, for example, a thick line for traffic jams, a thin line for congestion, and no arrows for empty roads. In addition, when changing the color and thickness of the arrow to be displayed, for example, the traffic jam is red and thick, the congestion is yellow and thin, and the empty road has no arrow.

  On the other hand, the distribution-type reception server in the information center 2 obtains traffic information from the collection-type transmission server at a predetermined timing in the information reception unit 22a. That is, the receiving server of the information center 2 makes a transmission request for traffic information to the collecting transmission server. The collection transmission server transmits the generated traffic information to the distribution reception server in response to the transmission request.

  Next, the receiving server of the information center 2 determines whether or not the direction of the traffic jam indicated by the traffic information received by the direction conversion processing unit 22b is correct. If the direction is not correct, the direction is changed (reversed). Process. In other words, it is determined whether or not the direction of the traffic jam indicated by the received traffic information matches the actual situation. If the direction does not match, the direction conversion process is performed to convert (reverse) the direction.

  As described above, in the traffic information in the present embodiment, in addition to the current status information and the prediction information, coordinates indicating the position (coordinates indicating the position of the end of the traffic jam) and directions (the traffic jam occurs with respect to the coordinates). Direction). In other words, in this embodiment, a so-called location reference method (position reference method) is adopted. Therefore, when the definitions of coordinates and directions are different between the navigation device 1 side and the information center 2, the direction of the traffic jam indicated by the traffic information is reversed. That is, the information center 2 transmits coordinates and directions in addition to the current status information and prediction information. On the navigation device 1 side, whether the direction is the upstream direction or the downstream direction, the coordinates are the starting point of the traffic information. It is not possible to identify whether it is an end point or not.

  For example, a situation as shown in FIG. 3 will be described as an example. In the place shown in FIG. 3, road A and road B intersect. Road A is not congested. On the other hand, road B is congested in both directions starting from the intersection with road A. In this way, many traffic jams occur starting from a traffic jam prediction point such as an intersection.

  Traffic information (present status information, prediction information, coordinates, direction) in such a situation is distributed to the navigation device 1. On the navigation device 1 side, the coordinates included in the received traffic information are defined as the end point (tip of the arrow) and the direction is defined as the downstream direction.

  At this time, when the navigation device 1 does not convert the received traffic information and outputs it to the display device 9 as it is, as shown in FIG. 4, the traffic congestion is reduced toward the intersection and displayed. As described above, many traffic jams start from a traffic jam prediction point such as an intersection. However, in this traffic information, the intersection is the end point.

  For example, if the coordinates are defined as the start point, the traffic information depends on whether the start point is defined as the start point of the traffic jam (the tip of the arrow) or the start point of the traffic jam information displayed on the display device 9 (the rear end of the arrow). The direction of traffic jams will change. Conversely, if the coordinate is defined as the end point, whether the end point is defined as the end of the traffic jam (the end of the arrow) or the traffic information displayed on the display device 9 is defined as the end point (the tip of the arrow) The direction of traffic congestion indicated by traffic information also changes. Further, when the direction is defined as the upstream direction, the direction of the traffic jam varies depending on whether the upstream direction is the traveling direction side of the vehicle M or the opposite side of the traveling direction with respect to the coordinates.

  Therefore, the receiving server of the information center 2 performs the direction conversion process in the direction conversion processing unit 22b. That is, based on the traffic information, it is determined whether or not the traffic congestion is eased toward a preset traffic congestion prediction point (position data) stored in the storage unit (determination means). And when it determines with the traffic congestion being eased toward the traffic congestion prediction point set beforehand, the direction of traffic information is reversed (direction conversion means). If it is determined that the traffic congestion has not been eased toward the preset traffic congestion prediction point, the direction of the traffic information is not reversed. By doing in this way, the mistake of the traffic jam direction which traffic information shows can be suppressed.

  In addition, when determining whether traffic congestion is eased toward the preset traffic congestion prediction point memorize | stored in the memory | storage part based on traffic information, for example, toward position data which shows a traffic congestion prediction point It may be determined by the ratio between the rate of increasing traffic congestion and the rate of mitigation, or it may be determined by the overall rate.

  The distribution server of the information center 2 distributes the traffic information output from the direction conversion processing unit 22b to the plurality of vehicles M.

  When the navigation device 1 receives the traffic information distributed through the direction change processing unit 22b and outputs the traffic information to the display device 9, as shown in FIG. 5, there is traffic congestion toward the intersection. Increased and displayed. That is, traffic information that matches the actual situation of the intersection can be output (displayed).

  Further, in the above-described embodiment, it is determined whether or not the traffic congestion is eased toward the traffic congestion prediction point set in advance based on the traffic information, but the present invention is not limited to this. Depending on the definition of coordinates and direction in the probe data, there is a possibility that the direction of traffic congestion indicated by the traffic information generated based on the probe data is reversed (different from the actual situation) for the same reason as in the case of traffic information. is there. That is, even if the coordinates and direction definitions in the probe data are different between the navigation device 1 side and the information center 2 side, the direction indicated by the traffic information generated based on the probe data may be reversed. .

  Therefore, as a modification, based on the probe data, it is determined whether or not the traffic congestion is reduced toward a preset traffic congestion prediction point. If it is determined that the traffic congestion is reduced, the direction of the probe data May be reversed.

  The information center 2 in the modification will be described with reference to FIG.

  The information center 2 collects probe data from a plurality of navigation devices 1 as described above, generates traffic information indicating the degree of traffic congestion on the road, and distributes the generated traffic information to the plurality of navigation devices 1. The system can be divided into a probe data collection system and a traffic information distribution system.

  The collection system of the information center 2 in the modified example includes a transmission server that collects probe data from the navigation device 1 mounted on the plurality of vehicles M and transmits the probe data to the distribution system. When the collection system of the information center 2 is represented by functional blocks, it includes a data collection unit 21a1, an information transmission unit 21b1, and the like.

  On the other hand, the distribution system of the information center 2 receives the probe data transmitted from the collection system, performs the determination process of the direction of the probe data that reverses the direction as necessary, and generates the traffic information. A receiving server and a distribution server for distributing the generated traffic information are provided. When the distribution system of the information center 2 is represented by functional blocks, an information receiving unit 22a1, a direction conversion processing unit 22b1, an estimation complementing processing unit 22c1, a current state DB (current state database) 22d1, a statistical DB (statistical database) 22e1, and a prediction processing unit 22f1, a traffic information storage unit 22g1, an information distribution unit 22h1, and the like.

  The essential difference between the modified example and the above-described embodiment is whether the information to be subjected to the direction changing process is probe data or traffic information. The data collection unit 21a1, the information transmission unit 21b1, the information reception unit 22a1, the estimation complement processing unit 22c1, the current status DB 22d1, the statistical DB 22e1, the prediction processing unit 22f1, the traffic information storage unit 22g1, and the information distribution unit 22h1 in the first modification are described above. It is equivalent to the data collection unit 21a, the estimation complement processing unit 21b, the current state DB 21c, the statistical DB 21d, the prediction processing unit 21e, the traffic information storage unit 21f, the information transmission unit 21g, the information reception unit 22a, and the information distribution unit 22c of the embodiment. Therefore, explanation is omitted.

  The receiving server of the information center 2 performs the direction conversion process in the direction conversion processing unit 22b1. That is, based on the probe data, it is determined whether or not the traffic congestion is reduced toward a preset traffic congestion prediction point (position data) stored in the storage unit (determination means). When it is determined that the traffic congestion is eased toward the traffic congestion prediction point set in advance, the direction of the probe data is reversed (direction changing means). In addition, when performing a direction change process with respect to probe data, it can be determined whether traffic congestion is eased by the speed contained in probe data. Further, when it is determined that the traffic congestion has not been eased toward the preset probe data, the direction of the traffic information is not reversed.

  By doing in this way, the mistake of the traffic direction which the traffic information produced | generated based on probe data shows can be suppressed.

  In the above-described embodiment and modification, the example in which the direction changing process is performed in the information center 2 has been described, but the present invention is not limited to this. The navigation device 1 may perform a direction changing process on the received traffic information.

  DESCRIPTION OF SYMBOLS 1 Position detector, 2 Information center, 3 Control part, 4 Position detector, 5 Map data input device, 6 Operation switch group, 7 Transmitter / receiver, 8 External memory, 9 Display apparatus, 10 Voice controller, 11 Voice recognition apparatus, 12 remote control sensor, 13 speaker, 14 microphone, 15 remote control, 16 vehicle speed sensor, 4a geomagnetic sensor, 4b gyroscope, 4c distance sensor, 4d GPS receiver, 21a data collection unit, 21b estimation complement processing unit, 21c current status DB (current status) Database), 21d statistical DB (statistical database), 21e prediction processing unit, 21f traffic information storage unit, 21g information transmission unit, 22a information reception unit, 22b direction conversion processing unit, 22c information distribution unit

Claims (4)

An in-vehicle device that is mounted on a vehicle and transmits probe data including coordinates, speed, and direction indicating the position of the vehicle, and indicates the degree of traffic congestion on the road by collecting the probe data from the plurality of in-vehicle devices A traffic information distribution system including an information center that generates traffic information and distributes the generated traffic information to the plurality of in-vehicle devices,
The traffic information includes coordinates indicating the position of the end of the traffic jam indicated by the traffic information, and information regarding the direction in which the traffic jam occurs with respect to the coordinates,
Based on the traffic information, determination means for determining whether or not the traffic congestion is eased toward a traffic congestion prediction point set in advance,
When it is determined by the determination means that the traffic congestion is eased toward a preset traffic congestion prediction point, a direction conversion means for reversing the direction of the traffic information;
A traffic information distribution system comprising: An in-vehicle device that is mounted on a vehicle and transmits probe data including coordinates, speed, and traveling direction indicating the position of the vehicle, and the degree of traffic congestion on the road by collecting the probe data from a plurality of the in-vehicle devices A traffic information distribution system including an information center that generates traffic information to be displayed and distributes the generated traffic information to the plurality of in-vehicle devices,
The traffic information includes coordinates indicating the position of the end of the traffic jam indicated by the traffic information, and information regarding the direction in which the traffic jam occurs with respect to the coordinates,
Based on the probe data, determination means for determining whether or not the traffic congestion is eased toward a traffic congestion prediction point set in advance,
When it is determined by the determination means that the traffic congestion is reduced toward a preset traffic congestion prediction point, a direction conversion means for reversing the direction of the probe data;
A traffic information distribution system comprising:   The traffic information distribution system according to claim 1, wherein the determination unit and the direction conversion unit are provided in the information center.   The traffic information distribution system according to claim 1, wherein the determination unit and the direction conversion unit are provided in the in-vehicle device.

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