JP4075784B2 - Road condition information provision system - Google Patents

Description

  The present invention relates to a road condition information providing system that intermittently transmits to a vehicle-mounted terminal the situation information of a road ahead of the current position of the vehicle from the information distribution center to the vehicle-mounted terminal.

The car navigation device performs driving support by detecting the current position of the host vehicle and displaying a road map around the current position on a display device such as a liquid crystal display. In this car navigation device, a system has been proposed in which map data is acquired from a center via a network and the latest map data can be displayed on a display.
When such a car navigation device having a communication function with the outside is regarded as an in-vehicle terminal, for example, Patent Document 1 discloses a geographical environment (straight path, turning circuit, downhill, It is disclosed that an uphill, a road friction coefficient, a road turning curvature, etc.) are transmitted from a road condition providing means to an in-vehicle terminal.

Patent Document 2 discloses a system in which signal control timing information is transmitted from a signal device, and this is received by an in-vehicle terminal.
Japanese Patent Laid-Open No. 2003-11806 JP-A-5-303700

    In the future, car navigation systems will not only present terrain information on a map, but also provide more driving assistance colors including road status information (eg, freezing, accidents, road regulations, etc.). There is a need to update information in real time. A conventional map data providing system cannot respond to such a request for information acquisition in real time.

  Further, in the system described in Patent Document 1, it is impossible to keep track of the terrain information area about the road and grasp the changing road conditions (road environment) and provide it as driving support information. In the system described in Patent Document 2, the information can only be acquired when the vehicle arrives at a point where the timing information of the traffic light can be received. For example, a frozen point of a road is acquired in advance. It is difficult to be a driving support information acquisition system in the sense of avoiding danger.

  The present invention has been made in view of the above circumstances, and provides a road condition information providing system capable of acquiring road condition information that changes every moment in real time.

The invention of claim 1 includes an information distribution center having a database storing the situation of each road, an in-vehicle terminal provided in the vehicle and capable of communicating with the information distribution center via a network, and a current position provided in the vehicle. Communication means via an information distribution center and a network, and notification means for notifying information relating to driving skills of a person who drives the vehicle, wherein the in-vehicle terminal is acquired by at least the current position acquisition means Vehicle information comprising vehicle current position information is intermittently transmitted to the information distribution center , and the information distribution center determines the degree of driving skill based on information related to driving skill notified from the notification means. finalized degree adjustment information and without driving skills, the current position of the vehicle based on said vehicle information transmitted from the vehicle terminal and The status information of the road ahead in the traveling direction of the vehicle to obtain the row direction, the vehicle-mounted terminal, the intermittently transmitted with a time interval that varies based on the adjustment information, the in-vehicle terminal from the information distribution center The road condition information transmitted intermittently is output.

According to this configuration, the in-vehicle terminal transmits vehicle information including at least the current position information of the own vehicle to the information distribution center, and the information distribution center acquires the position and traveling direction of the vehicle acquired from the vehicle information. Since the road status information is intermittently transmitted to the in-vehicle terminal of the vehicle, the driver changes the road status information in front of the vehicle (freezing of the road, occurrence of an accident, occurrence of road regulations, etc.) In this case, the status information after the change can be known in real time by intermittent transmission. In this case, since the information distribution center changes the time interval for transmitting the road situation information to the in-vehicle terminal according to the skill of the driver, the frequency of sending the situation information is changed for a person with high driving skill. For example, the transmission time interval can be changed according to the driving skill, and the significance as driving support information can be enhanced.

In the invention of claim 2, the information distribution center sequentially stores the road that is currently traveling, the current time, and the current speed, and stores the current speed when traveling on the same road in the past at a time close to the current time. Since the time interval for sending road status information to the in-vehicle device is changed based on the comparison result, the road status information is assumed to be faster than usual if the current speed is faster than the past speed. and shorten the time between sending, Ru can be reliably recognize that approaches to eventually danger point.

In the invention of claim 3 , since the information distribution center changes the time interval for transmitting road condition information to the in-vehicle terminal according to the physical condition of the driver, when the physical condition is bad, the time interval is shortened to predict the danger. Ru can be adapted to be reliably performed.

In the invention of claim 4 , since the information distribution center transmits the vehicle information to the in-vehicle terminal at the time interval notified from the notification means, the person who drives the vehicle sets the time interval for acquiring the road condition information. It can be set freely according to your preference.

In the invention of claim 5 , since the information distribution center transmits the type of situation information notified from the notification means to the in-vehicle terminal, the person who drives the vehicle transmits the situation information of the road to be transmitted from the information distribution center. You can choose.
In the invention of claim 6 , since the information distribution center transmits the status information of the type notified from the notification means to the in-vehicle terminal at the time interval notified for each, the person who drives the vehicle is notified from the information distribution center. It is possible to freely select the road situation information to be transmitted and the time interval to receive the situation information.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall configuration of a road condition information providing system. An information distribution center 1 has an information processing device 2 composed of a computer as information processing means and a database 3 as data storage means for storing various data. Is provided. The information distribution center 1 communicates with the in-vehicle terminal 6 of the automobile 5 or the personal computer 7 installed at home via the network 4. For example, the in-vehicle terminal 6 and the personal computer 7 are transmitted by WWW or e-mail over the Internet. Various information can be exchanged.

    The in-vehicle terminal 6 has a car navigation function, a function of connecting to the information distribution center 1 wirelessly via the network 4 and acquiring various information, and not shown from various ECUs 8 (see FIG. 2) of the automobile 5. A support function for acquiring data such as the vehicle speed detected by the vehicle speed sensor and outputting a deceleration command and a brake command to the ECU 8 is provided. When the ECU 8 receives a deceleration command or a brake command, the automobile 5 automatically reduces the engine rotation speed or automatically operates the brake device under the control of the ECU 8 as vehicle control means. Yes.

  FIG. 2 shows an electrical configuration of the in-vehicle terminal 6. The control circuit 9 as a control means includes a position detection unit 10 as a current position acquisition means, a map data storage section 11 as a map data acquisition means, and a display means. A display 12, an input unit 13 as an input unit, an audio output unit 14 as a notification unit, and a communication device 15 as a communication unit are connected, and also connected to the various ECUs 8 via an I / F 16 for in-vehicle LAN. ing. The control circuit 9 is mainly composed of a microcomputer having a CPU, a RAM, a ROM, and the like. The ROM has a program for a car navigation function, a program for communication with the information distribution center 1, a deceleration command and a brake command. Is stored.

  The position detection unit 10 includes a GPS receiver, a geomagnetic sensor, a gyroscope, a distance sensor, and the like. The position detection unit 10 detects the current position of the automobile 5 while interpolating with each of the sensors. In addition, you may comprise the position detection part 10 by GPS receiver alone. The map data storage unit 11 includes a recording medium such as a DVD-ROM and a reading device that reads data from the recording medium, and inputs map data, map matching data, and the like.

  The display device 12 is configured by, for example, a liquid crystal display, and includes a screen that can display color, and can display a map, characters, images, and the like. The indicator 12 is disposed at a position that can be seen by the driver. The input unit 13 includes a touch panel that is also received on the screen of the display 12, a mechanical switch that is provided in the periphery of the display screen, and the like. The voice output unit 14 includes a speaker and outputs voice for route guidance, voice for screen operation, and the like. The communication device 15 communicates with the information distribution center 1 via the network 4 by radio. Specifically, the communication device 15 can be variously considered such as a mobile phone such as a mobile phone or a PHS, a DSRC (narrowband wireless communication), or a wireless LAN communication device.

  Now, the information distribution center 1 transmits to the in-vehicle terminal 6 information on road conditions ahead of the traveling direction (environmental information) such as freezing, accidents, lane restrictions, construction regulations, and signal switching timing. The type of road status information transmitted to the in-vehicle terminal 6 can be selected by a person (user) driving the automobile 5. The status information is transmitted intermittently, and the transmission interval time can be set to a time desired by the user. And the information delivery center 1 comes to change this predetermined transmission interval time according to a driving | running state, a user's driving skill, and the consciousness (for example, hurrying) at the time of driving | running | working. Yes.

  The database 3 of the information distribution center 1 stores map data, user information such as the user's address, name, ID number, and password, the type of status information selected by the user, and the transmission time for each status information. Stores information such as intervals, user's driving skill level, user's travel history (travel speed for each route, time zone, etc.), freezing information for each road, accident information, accident location information, lane regulation information The latest road condition information (road environment information) such as construction regulation information and switching timing information of each signal is stored. Information such as freezing, accidents, regulations, and signal switching timing is updated from time to time to the information distribution center 1 from a department that manages roads, and the information is rewritten with existing information in the database 3. ing.

  The information processing device 2 of the information distribution center 1 is currently driving based on information transmitted from the in-vehicle terminal 6 by operating based on a program stored in a storage unit included in the information processing device 2. The type of situation information desired to be transmitted from the driver's personal information, the transmission time interval, the driving skill, etc. are read from the database 3 and the road situation information ahead of the car 5 is read and intermittent. To send.

  Next, communication between the information distribution center 1 and the in-vehicle terminal 6 will be described with reference to FIGS. In order to receive the distribution of road status information, it is necessary to apply for membership to the information distribution center 1. The flow of the member application process is shown in FIG. This membership application can be made by the personal computer 7 as a notification means incorporating a program for that purpose. The membership application program may be incorporated in the in-vehicle terminal 6 and may be performed from the in-vehicle terminal 6.

  In order to register as a member, first, the personal computer 7 is started, the input means such as the keyboard is operated to select a registration processing program, and the address, name, password, etc. of the user (the person who drives the car 5) are selected. Perform various data input processes. At this time, the information is also input to the environment information provision list as shown in FIG. 4A and the driving skill list as shown in FIG. The list of environmental information provided in FIG. 4A is used to input specific environmental information desired to be distributed and the interval time between distributions. The information desired to be distributed is checked, and the desired interval time is entered as a numerical value. To do.

In addition, the driving skill list in FIG. 4 (b) is used to input data for registering the driving skill of a person who desires distribution, and a cognitive ability and a dangerous situation showing dynamic visual acuity and concentration have appeared. The rank is input by self-diagnosis about the slowness of judgment to determine the next action in case and the judgment power indicating correctness. The rank of the driving skill by this self-determination is determined as the driving skill rank to be registered as it is.
If the status information desired to be distributed is not checked in the environment information provision list, it is automatically set to a plurality of standard status information. In addition, even when no delivery time interval is input, a standard time is automatically set.

  After performing the input operation for the application as described above, this is transmitted from the personal computer 7 to the information distribution center 1 via the network 3 (step S1). When there is an application for registration, the information processing device 2 of the information distribution center 1 activates a registration program, executes registration processing according to the program, determines the ID number of the person who has applied, and the ID number Personal information such as address, name, and password is stored in the list of distributors in the database 3 (step S2), and the status information desired to be distributed and the transmission interval time of each status information are stored in the list of distribution conditions in the database 3 (Step S3). Further, the information processing device 2 determines a transmission time interval for each skill item based on the rank described in the transmitted driving skill list, and stores it in the distributor list of the database 3. In addition, the time interval according to the rank of the driving skill item is determined in advance, and the information processing apparatus 2 sets the time interval for each skill item based on this.

  After completing the application process as described above, the information processing device 2 of the information providing center 1 creates an e-mail indicating that the registration has been completed, sends it back to the applicant's personal computer 7 together with the determined ID number, and registers it. 5a, a list showing the types of status information to be distributed and the transmission time intervals in FIG. 5 (a), and the adjustment of the time intervals in the status information to be transmitted for the ranked driving skills in FIG. 5 (b). A list of coefficients is transmitted (step S4). The applicant can confirm that the registration is completed by receiving the mail on the personal computer 7 (step S5). The registration as described above can be performed by a plurality of people with one in-vehicle terminal 6 in consideration of driving a single car by a number of people.

After completing the registration, the user operates the input unit 13 of the in-vehicle terminal 6 to input an ID number, a name, and the like. This input data is stored in the memory of the in-vehicle terminal 6 (not shown). At this time, if the user is registered with a number or a nickname, each individual can be specified thereafter with the number or the nickname.
In order to receive the information from the information distribution center 1 with the in-vehicle terminal 6, when the in-vehicle terminal 6 is turned on and its own number or nickname is input through the input unit 13, its name and ID number are displayed on the display 12. After that, an operation for connecting to the information distribution center 1 by inputting a password is performed. Then, the control circuit 9 of the in-vehicle terminal 6 activates the communication program and connects the communication device 15 to the information distribution center 1. The control circuit 9 detects the current position from the position detection unit 10, detects the current vehicle speed from the ECU 8, and transmits the position information and the vehicle speed information to the information distribution center 1 as vehicle information.

  The information processing device 2 of the information wiring center 1 starts the running history program, obtains an average speed for each predetermined section based on the current position and the vehicle speed transmitted intermittently from the automobile 5, Then, it is determined which time zone of the predetermined time zone the current time measured by the clock means of the information processing apparatus 2 enters. And the average speed according to time slot | zone is stored in the database 3 for every predetermined area as driving | running | working log | history of those who are driving now.

  In addition, the information processing device 2 detects the traveling direction of the automobile 5 based on the current position information transmitted intermittently from the automobile 5. The traveling direction of the automobile 5 can be detected from current current position information and previous current position information. And the information processing apparatus 2 transmits the condition information of the road ahead of the advancing direction of the motor vehicle 5 intermittently as follows. By this intermittent transmission, the latest information newly input to the information distribution center 1 is delivered to the user in real time.

Next, the transmission operation performed by the information distribution center 1 will be described for each type of road situation information.
(1) Freezing information As shown in FIG. 6, it is assumed that the point A ahead of the traveling direction of the automobile 5 is frozen, and this latest freezing information is stored in the database 3. When the information processing apparatus 2 of the information wiring center 1 detects that the automobile 5 has approached the freezing point up to a predetermined distance based on the position information transmitted from the automobile 5 (point B in FIG. 6), only the predetermined distance is obtained. It starts transmitting that the front point A is frozen to the in-vehicle terminal 6 (step A1 in FIG. 7). The distribution of the freezing information is repeatedly performed at a time interval for transmitting the freezing information desired by the person driving the automobile 5. When the in-vehicle terminal 6 receives the freeze information by the communication device 15, the vehicle-mounted terminal 6 informs this by voice from the voice output unit 14 serving as a notification unit, or displays the map displayed on the display unit 12 using the display unit 12 as the notification unit. Notification is made by displaying the freezing point on the top (step A2).

When the driver receives the notification of the freezing point, the driver knows that the point A is not far from the point A and applies the brake to reduce the speed of the car 5. If the automobile 5 enters the freezing point A without decelerating, it is dangerous to slip and the information processing apparatus 2 transmits the deceleration information together with the delivery of the freezing information. This deceleration information includes the timing at which deceleration starts (when the automobile 5 has arrived at a point C at a predetermined distance shorter than the point B before the point A) and the deceleration g.
Since the control circuit 9 of the in-vehicle terminal 6 intermittently executes the operation of detecting the current position and the current vehicle speed, if the vehicle is not decelerated even when reaching the vehicle 5C point, the current position is When point C is reached, a deceleration command is output to the ECU 8, and the brake is operated so that the deceleration becomes g (step A3). As a result, the automobile 5 passes through the A point at a low speed without the risk of slipping before the frozen A point.
This operation is performed in the same manner when an accident occurs in front of the traveling direction, for example, and when this is transmitted to the in-vehicle terminal 6.

(2) Signal switching timing As shown in FIG. 8, when there is an intersection D with a traffic light in front of the traveling direction of the automobile 5, the information distribution center 1 sends position information and speed intermittently transmitted from the in-vehicle terminal 6. From the information, it is known that the automobile 5 has approached the intersection D to a predetermined distance (point E in FIG. 8). Then, the information processing device 2 of the information distribution center 1 switches to the in-vehicle terminal 6 to the stop signal (for example, after ta time) based on the signal switching timing information of the intersection stored in the database 3. ) Begin to be transmitted intermittently (step B1). In addition, when information indicating that there is an emergency vehicle (such as an ambulance) scheduled to pass through the intersection D in the information distribution center 1, the information processing device 2 stores that the emergency vehicle passes through the intersection C, Emergency vehicle passage information (for example, passing the intersection D after tb time) starts to be transmitted (step B1).

The distribution of the signal switching information and the emergency vehicle passage information is repeatedly executed at the transmission time interval of the signal switching timing information desired by the person driving the automobile 5. When the in-vehicle terminal 6 receives the signal switching information and the emergency vehicle passage information by the communication device 15, the in-vehicle terminal 6 notifies the voice output unit 14 by voice (step B2).
The driver knows the timing at which the traffic signal at the previous intersection is switched to the stop signal by voice notification, or the timing at which the emergency vehicle passes through the intersection, and brakes to reduce the speed of the automobile 5. If the automobile 5 enters the intersection without decelerating, it is dangerous, and the information processing apparatus 2 transmits the deceleration information similar to that described above together with the distribution of the signal switching information and the emergency vehicle passage information.

  Since the control circuit 9 of the in-vehicle terminal 6 intermittently executes the operation of detecting the current position and the current vehicle speed, the vehicle 5 is decelerated even when it reaches a predetermined distance (point F) before the intersection. If not, a deceleration command is output to the ECU 8 at the current position, and the brake is operated so that the deceleration becomes g (step B3). Thereby, the car 5 stops before the intersection (point G).

(3) When an accident occurs frequently The accident distribution point is registered in the database 3 of the information distribution center 1. When the information processing apparatus 2 detects that the traveling direction of the automobile 5 is registered based on the position information from the in-vehicle terminal 6 and the accident occurrence point is registered, and the automobile 5 detects that the vehicle 5 has approached the predetermined distance from the accident occurrence point, While transmitting the location information of the frequent occurrence point to the in-vehicle terminal 6, it starts transmitting that it is approaching the accident frequent occurrence point.

In this case, it is necessary to distribute the approach information more frequently than usual to the car that is approaching the accident frequent occurrence point and frequently ask the driver to recognize it. For this reason, the information processing device 2 frequently transmits the approach information to the accident-prone point at a time interval shorter than the time interval predetermined on the user side. As a result, the driver can more reliably recognize the approach to the accident frequent occurrence point. In addition, you may make it transmit the approach information to an accident frequent occurrence point at a shorter time interval as the distance to the accident frequent occurrence point becomes short.
Based on the transmission information from the information distribution center 1, the in-vehicle terminal 6 displays the accident-prone point on the map of the display 12 and notifies the fact that the accident-prone point is approaching by voice or the like. Thereby, a driver | operator will come to drive carefully when passing an accident frequent occurrence point.

(4) Driving speed In the database 3 of the information distribution center 1, the average traveling speed is recorded for each route of the vehicle 5 for each route and for each time zone. Then, the traveling speed on the road on which the driver is currently traveling is detected by information transmitted from the in-vehicle terminal 6, registered in the database 3, and compared with past data.

  The information processing device 2 compares the current travel speed with the past travel speed data for the same person, the same route, and the same time zone, and if it is faster than the average of the past travel speeds, the driver's intention Is determined to be in a hurry, and for example, the time interval for transmitting road condition information such as approach to a point where accidents frequently occur is shorter than the time interval set in advance by the user. Thereby, the driving support effect can be further enhanced.

(5) Others The database 3 of the information distribution center 1 stores the degree of driving skill of the person who drives the automobile 5. If the driver of the current car 5 is excellent in driving skills, it will be annoying to send the road status information too frequently, so depending on the level of driving skills, it will be more difficult than the preset time interval. Send status information at long time intervals. Conversely, when a person with low driving skills drives the automobile 5, it is preferable for driving support that road condition information is transmitted at short time intervals. For this reason, when a person with low driving skill drives, the situation information is transmitted at a time interval shorter than a preset time interval according to the degree of the driving skill.

  Specifically, the time interval adjustment coefficient determined for each driving skill item is set to 1 at the center rank, and is set to a value greater than 1 as the skill increases, and is smaller than 1 as the rank decreases below the center rank. Therefore, the adjusted time interval is obtained by multiplying the time interval set by the user by the average value of the adjustment coefficient of each skill item, and the status information is transmitted at this adjusted time interval. Depending on the situation information, the adjusted time interval may be determined using an adjustment coefficient defined for one of the driving skill items related to the situation information.

Further, a physical condition measuring means for measuring the physical condition of the driver, for example, a device for measuring the pulse is provided in the driver's seat of the automobile 5. Then, the pulse information is transmitted to the information distribution center 1 by the communication device 15. The information processing device 2 of the information distribution center 1 registers the pulse of the driver in the time zone in the database 3.
When sitting in the driver's seat, the person's pulse is transmitted to the information distribution center 1. The information processing device 2 compares the transmitted pulse with the pulse of the same person in the past and the pulse of the same time period (average), and determines that the physical condition is bad if it is fast. In case of physical condition, road condition information is frequently given.

As described above, according to the present embodiment, since the road condition information is intermittently distributed, the driver can surely recognize the road condition information in real time.
Moreover, since the time interval for transmitting the status information can be set according to the user's desire, the information is frequently sent and feels troublesome, or the transmission time interval is too long and the driving support effect is reduced. There is no fear of being

In addition, since the situation information to be delivered can be selected according to the user's desire, there is no need to feel too much trouble because the number of situation information to be delivered is too large.
The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
The map data may be distributed from the information distribution center 1 to the automobile 5. In this case, the communication device 15 becomes the map data acquisition means.

The vehicle information transmitted from the in-vehicle terminal 5 to the information distribution center 1 may be only current position information or may include information on the traveling direction of the automobile 5.
The type of status information distributed from the information distribution center 1 to the in-vehicle terminal 6 and the time interval for transmitting the status information may be changed not only at the time of registration but also at an arbitrary time thereafter.

1 is an overall view of a system showing an embodiment of the present invention. Block diagram showing the electrical configuration of the in-vehicle terminal Sequence showing registration process Figure showing information provision items at the time of registration Figure showing registration result notification items Diagram for explaining the transmission timing when there is a freezing point Same sequence The figure for explaining the transmission timing of the signal switching timing Same sequence

Explanation of symbols

In the drawings, 1 is an information distribution center, 2 is an information processing device, 3 is a database, 5 is an automobile, 6 is an in-vehicle terminal, 7 is a personal computer (notification means), 9 is a control circuit, 10 is a position detector, and 11 is a map. A data storage unit, 12 is a display, 14 is an audio output unit, and 15 is a communication device.

Claims (6)

An information distribution center having a database storing the situation of each road;
An in-vehicle terminal provided in a vehicle and capable of communicating with the information distribution center via a network;
Current position acquisition means provided in the vehicle ;
Communicating with the information distribution center via a network, and notifying means for notifying information on the driving skill of the person driving the vehicle ,
The in-vehicle terminal intermittently transmits vehicle information including at least the current position information of the vehicle acquired by the current position acquisition unit to the information distribution center,
The information distribution center determines the degree of the driving skill based on the information related to the driving skill notified from the notification means, and uses the determined degree of the driving skill as adjustment information, and the vehicle transmitted from the in-vehicle terminal Obtaining the current position and traveling direction of the vehicle based on the information , and transmitting the situation information of the road ahead of the traveling direction of the vehicle to the in- vehicle terminal intermittently with a time interval that changes based on the adjustment information ,
The road-mounted information providing system, wherein the in-vehicle terminal outputs the road condition information intermittently transmitted from the information distribution center. An information distribution center having a database storing the situation of each road;
An in-vehicle terminal provided in a vehicle and capable of communicating with the information distribution center via a network;
Current position acquisition means provided in the vehicle;
A speed sensor provided in the vehicle for detecting the speed of the vehicle;
The in-vehicle terminal intermittently transmits vehicle information including at least the current position information of the vehicle acquired by the current position acquisition unit to the information distribution center, and transmits speed information detected by the speed sensor to the information distribution center. Send intermittently,
The information distribution center sequentially stores the road that is currently running, the current time, and the current speed, and compares the current speed with the stored speed when the same road was traveled in the past at a time close to the current time. The comparison result is used as adjustment information, the current position and the traveling direction of the vehicle are acquired based on the vehicle information transmitted from the in-vehicle terminal, and road situation information ahead of the traveling direction of the vehicle is transmitted to the in-vehicle terminal. , Intermittently transmitting at time intervals that change based on the adjustment information,
The road-mounted information providing system, wherein the in-vehicle terminal outputs the road condition information intermittently transmitted from the information distribution center . An information distribution center having a database storing the situation of each road;
An in-vehicle terminal provided in a vehicle and capable of communicating with the information distribution center via a network;
Current position acquisition means provided in the vehicle;
Physical condition measuring means provided in the vehicle, for measuring the physical condition of the driver of the vehicle,
The in-vehicle terminal intermittently transmits vehicle information including at least the current position information of the vehicle acquired by the current position acquisition unit to the information distribution center, and the physical condition information measured by the physical condition measurement unit is the information distribution center. Send intermittently to
The information distribution center uses the physical condition information as adjustment information, acquires the current position and traveling direction of the vehicle based on the vehicle information transmitted from the in-vehicle terminal, and information on the road ahead of the traveling direction of the vehicle To the in-vehicle terminal intermittently with a time interval that changes based on the adjustment information,
The road-mounted information providing system, wherein the in-vehicle terminal outputs the road condition information intermittently transmitted from the information distribution center . A notification means is provided for communicating with the information distribution center via a network, and the information distribution center notifies the vehicle of a time interval for transmitting the road status information to a desired time,
The information distribution center, traffic condition reporting system according to any one of claims 1 to 3 with between intervals and transmits the vehicle information to the vehicle terminal when notified from the notification unit. A notification means is provided that communicates with the information distribution center via a network and is capable of selecting and notifying the road status information transmitted from the information distribution center to the in-vehicle terminal from a plurality of types of status information;
The road information providing system according to any one of claims 1 to 3 , wherein the information distribution center transmits the type of situation information notified from the notification unit to the in-vehicle terminal . The information distribution center communicates with the information distribution center via a network, and the information distribution center selects the road situation information transmitted from the information distribution center to the in-vehicle terminal from a plurality of types of situation information, and the information distribution center for each of the selected situation information Is provided with a notification means for notifying the time interval transmitted from the vehicle-mounted terminal to a desired time ,
The information distribution center, the status information of the type notified from the notification unit, claims 1 and transmits with the notification time interval for each said vehicle terminal 3 according to any one Road situation information provision system.

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