JP6319408B2 - In-vehicle device - Google Patents

Description

The present invention relates to a system that supports a driver's safe driving in cooperation with a road device and an in-vehicle device, and in particular, a traffic signal device that can provide signal information such as a light color and a continuous number of seconds indispensable for this system is installed about the information providing system for notifying information related to the intersection with the driver.

  Conventionally, in order to prevent traffic accidents caused by vehicles in and around the intersection, signal information such as the traffic light color and duration of the traffic signal provided at the intersection is provided in advance to the traveling vehicle. A safe driving support for controlling the speed of the vehicle by determining whether the vehicle-mounted device mounted on the vehicle can safely stop before the intersection based on the signal information and whether the vehicle can safely pass through the intersection A system has been proposed (see, for example, Patent Document 1).

  In the apparatus described in Patent Document 1, for example, time information until a traffic signal displaying blue turns red is transmitted from a transmission device provided on the road to the vehicle, and this time information is transmitted on the in-vehicle device side. And the travel speed at that time, and if it is determined that there is no time to safely pass the intersection, that is, if it is determined that the vehicle should stop before the intersection, the vehicle is automatically braked and The vehicle is controlled to decelerate and stop before stopping at the intersection.

Japanese Patent No. 2806801

However, traffic signals that can provide signal information such as lamp color and duration seconds are not necessarily installed at all intersections, and there may be a mixture of intersections where such traffic signals are installed and intersections that are not. .
Then, for example, when there is an intersection where traffic signals that can provide signal information are installed and an intersection that does not, there is a control to decelerate and stop the vehicle at one intersection, and this intersection at the next passing intersection Such a control is not performed, and a driver who expects an improvement in safety by speed control of the safe driving support system may be confused.

  The object of the present invention is to speed control of the safe driving support system and to the driver without being confused even if there is a mixture of intersections where traffic signals that can provide signal information are installed and intersections that are not. It is an object to provide an information providing system that can receive a safe driving support control service such as an instruction to decelerate by a voice or the like, or a warning to the driver that a lamp color is switched by a voice or the like.

An information providing system according to an embodiment of the present invention is an information providing system including an in-vehicle device mounted on a vehicle and a road device that transmits information to the in-vehicle device, and the road device is predetermined. Means for transmitting to the in-vehicle device service intersection information for identifying whether the target intersection is a service intersection in which a traffic signal capable of providing signal information is installed; based on the service intersection information received from the road device, that having a generating means for generating a broadcast information to the occupant of a vehicle in which the vehicle device is mounted. Here, an intersection where a traffic signal capable of providing signal information is installed is a service intersection.

  For example, the roadside device transmits service intersection information for identifying whether or not the intersection included in the road map data stored in the vehicle-mounted device is a service intersection, and the vehicle-mounted device receives the service intersection. Based on the information, image information is created by superimposing and drawing the location of the service intersection on the road map and displayed on the in-vehicle monitor. Then, the passengers of the vehicle including the driver can recognize in advance which intersection is the service intersection, so even if there is a mixture of service intersections and other intersections, speed control and deceleration instructions without being confused Can receive safe driving support control services such as alerting.

Also, the service intersection information, at least one it is not preferable to contain identification information of a road that flows into the intersection and identification information of the intersection.

  For example, the service intersection information may be information in which a number for identifying an intersection is associated with a flag indicating whether the intersection is a service intersection. Alternatively, the service intersection information may be information in which a number identifying a road flowing into the intersection is associated with a flag indicating whether or not the intersection is a service intersection. This is useful because the driver can recognize in advance whether or not he / she can receive the safe driving support control service at the intersection ahead of each road. The service intersection information may be information in which a number for identifying an intersection, a number for identifying a road flowing into the intersection, and a flag indicating whether the intersection is a service intersection are associated with each other.

Further, wherein the service intersection information, said signal information and information on the status of providing the signal information providing a stop event at least one of it is not preferable to contain the information about the in the service intersection.

Even at a service intersection, a traffic signal may stop providing signal information for reasons such as failure or maintenance, and a safe driving support control service cannot be received at such a service intersection. Therefore, in the embodiment of the present invention , the service intersection information includes information on whether or not the traffic signal is actually providing signal information at the service intersection, so that the service intersection information that does not provide signal information is directed to. Even when the vehicle is traveling, the driver can recognize in advance that he / she cannot receive the safe driving support control service.

  In addition, if the service intersection information includes information on the reason for the suspension of traffic signal maintenance, traffic signal abnormalities, road equipment abnormalities, etc., the driver must pass the service intersection from the reason for the suspension. It is useful for drivers because it can recognize whether attention is needed. For example, if the provision stoppage is an abnormality in the traffic signal, the traffic signal is not operating normally, so the driver can recognize in advance that the driver needs attention when passing the service intersection. If the road device is abnormal, the traffic signal is operating normally, so the driver can recognize in advance that no attention is required when passing the service intersection.

Also, the service intersection information, said information indicating the service level of the signal information is, it is not preferable to include in the service intersection. Here, the service level refers to information including at least one of a reliability level representing high reliability of signal information and an implementation level representing the content of the safe driving support control service that can be implemented by the vehicle. .

  For example, when signal information of a light color “blue” and a duration of “10 seconds” is provided to a vehicle from a traffic signal via a road device, the signal information is transmitted between the traffic signal and the road device. The vehicle reaches the vehicle after the time, the processing time of the road device, and the communication time between the road device and the vehicle have elapsed. If the total time of the above communication time and processing time (this is called the delay time) is 1 second, when the blue continuous number of seconds becomes 9 seconds, the vehicle will change to the above light color “blue”. Since the signal information of the duration of “10 seconds” is received, the vehicle erroneously recognizes the blue duration of seconds by the delay time. Furthermore, the delay time may vary depending on the communication quality of the communication path, the processing capability of various devices on the communication path, and the like. Therefore, the reliability of the continuous number of seconds recognized by the vehicle depends on the delay time and its variation.

  By the way, in the safe driving support control service that controls the speed of the vehicle or instructs the driver to decelerate, the signal information to be received is much less than the safe driving support control service that alerts the driver that the light color is switched. High reliability is required. The reason is as follows. Even if the delay time is 1 second, a vehicle traveling at a speed of 90 km / h will travel 25 m in the meantime. Then, after 9 seconds, the light color actually switches from blue to yellow, and the vehicle position at that time is in front of the stop line, so the vehicle should be controlled to stop by operating the brake. First, the vehicle erroneously recognizes that it will switch after one second, and because the vehicle position at that time is determined to be after passing the stop line that has advanced 25 meters further, the vehicle may be controlled to maintain the speed. There is sex. Therefore, in the safe driving support control service for speed control and deceleration instruction, the signal information is required to have very high reliability. On the other hand, if the driver informs the driver that the lamp color will soon switch from blue to yellow 3 seconds before the lamp color changes from blue to yellow, the lamp color will not switch from blue to yellow after 3 seconds. Even if it switches after 2 seconds, it must be “soon” for the driver. Therefore, the safety driving support control service for alerting does not require so high reliability. Therefore, if the delay time or its variation is large, the signal information is applicable to the safe driving support control service for speed control or deceleration instruction even if it is sufficiently applicable to the safe driving support control service for alerting. It may not be possible.

Therefore, in the embodiment of the present invention , for example, by including reliability level information indicating the reliability of signal information at the service intersection in the service intersection information, when the reliability is high, speed control or Implement safe driving support control services with higher safety, such as deceleration instructions, and implement safety driving support control services such as alerts when safety is not high, or do not implement safe driving support control services In this way, the driver can receive an appropriate safe driving support control service according to the high reliability of the signal information. The reliability level can be expressed by, for example, three levels such as “high”, “standard”, and “low”. Further, the delay time and the magnitude of the fluctuation may be expressed as a delay time “small”, a fluctuation “large”, or the like.

  Moreover, you may directly use the content of the safe driving assistance control service which a vehicle can implement instead of high reliability. In other words, the service intersection information includes “safety control level”, “deceleration instruction level”, “attention level”, “simple reference information level”, etc. By including an implementation level that represents the content, if the vehicle implements a safe driving support control service corresponding to the implementation level, the driver can provide an appropriate safe driving support control service according to the reliability of the signal information. Can receive.

Also, the service intersection information, said information indicating the security level of the signal information is, it is not preferable to include in the service intersection. Here, the security level refers to a high level of signal information safety due to processing such as encryption and encoding.

  For example, if a camouflaged road device that intercepts signal information from a traffic signal to a vehicle, creates fake signal information, and provides the vehicle is installed, the camouflaged road device is a signal whose lamp color is red Intercept information, create false signal information with blue light color, and provide it to the vehicle, the vehicle enters the intersection in red without performing deceleration control by trusting the false signal information, traffic An accident may be caused.

Therefore, in the embodiment of the present invention, by including information indicating the security level of the signal information at the service intersection in the service intersection information, when the security level is high, safety such as speed control and deceleration instruction is higher. If the safe driving support control service is implemented and the security level is not high, the driver can provide appropriate safe driving support according to the high security level of the signal information by performing a safe driving support control service such as alerting. Receive control services. The security level can be expressed in, for example, three levels of “high”, “standard”, and “low”. In addition, when signal information is encrypted by a public key method or a secret key method, the longer the length of these keys, the more difficult it is to decrypt the code, and the higher the security. Therefore, the security level may be expressed as “large”, “standard”, “small”, etc., by the length of the key. Alternatively, the key length itself may be expressed as “100 bytes”.

  Moreover, it is preferable that the service intersection information includes information about the implementation status of point sensitive control at the service intersection.

In the point sensitive control, the display time of the lamp color displayed based on the sensing information of the vehicle detector is extended or shortened. For example, in the right turn sensitive control, which is a kind of point sensitive control, the right turn dedicated display (blue arrow) shows the right turn vehicle gap (inter-vehicle time) with a vehicle detector provided in the right turn dedicated lane in a very short cycle ( For example, the measurement time is measured every 100 msec), and the display time of the right-turn exclusive display is extended or shortened according to the presence or absence of a gap. Therefore, it is practically difficult to predict the duration of the right-turn exclusive display in advance. Therefore, even if it is a service intersection, if it is an intersection that is performing point sensitive control, the duration of the light color may not be determined in advance, and depending on the timing of entering, you can receive a safe driving support control service There are cases where it is not possible. Therefore, in the embodiment of the present invention , the service intersection information includes information on whether or not the point sensitive control is performed at the service intersection, thereby traveling toward the service intersection that is performing the point sensitive control. Even if it is, the driver can recognize in advance that the driver may not be able to receive the safe driving support control service.

Also, the service intersection information, the information of traffic regulations he is not preferable to include in the service intersection.

  If the service intersection information includes traffic regulation information such as lane regulation and speed regulation at the service intersection, for example, the speed control is performed according to the speed regulation of 40 km / h by the safe driving support system. However, since the driver can recognize in advance that the speed control is performed in accordance with the speed regulation, there is no confusion.

Further, the notification information, it is not preferable the location of the intersection corresponding to the service intersection is image information drawn by superimposing the road map.

  For example, if an image drawn by superimposing the location of a service intersection on a road map is displayed on an in-vehicle monitor, the driver can recognize at a glance which intersection is a service intersection. Even if there are other intersections, you can get a safe driving assistance control service without being confused.

Further, the notification information, it is not preferable the intersection is voice information indicating whether or not the service intersection.

  For example, if you are traveling toward a service intersection, the driver will tell you that the next intersection is a service intersection, and if you are traveling toward an intersection that is not, the driver will tell you that this intersection is not a service intersection. If the service intersection and the other intersection are mixed, the driver can receive the safe driving support control service without being confused.

The in-vehicle device further includes search means for setting a cost required to pass the intersection based on the service intersection information, and searching for a guidance route to the destination using the set cost. it is not preferable for a guidance route searched by the search means is image information drawn by superimposing the road map.

  For example, if the in-vehicle device provides a driver with a guidance route searched so that a service intersection is preferentially routed, when the driver drives along this guidance route, the rate of passing the service intersection increases. Therefore, since the ratio of not being able to receive the safe driving support control service is low, it is less likely that the driver who expects to improve the safety by this service will be confused.

  In addition, at the service intersection, safe driving support control such as speed control, deceleration instruction, and alerting is performed, so that safety is high. Therefore, if a driver who is on a vehicle that can perform safe driving support control drives along the above guidance route, the rate of passing through the service intersection increases, so that traveling with high safety becomes possible.

  On the other hand, even a driver riding a vehicle that cannot perform safe driving support control can travel with high safety if driving along the above-described guidance route. This is because, at the service intersection, at least vehicles that can perform safe driving support control are traveling safely, so for example, the percentage of vehicles entering the intersection in red is small, but at any intersection that is not so However, since safe driving support control is not carried out, it cannot be said that such a ratio is small, and it can be said that the safety of passing through a service intersection is higher than passing through a non-intersection.

Further, the searching means sets the link cost of the link flowing into the intersection corresponding to the service intersection to be set relatively smaller than the link cost of the link flowing into the intersection not corresponding to the service intersection. it is not preferable that is configured to.

Further, the service intersection information includes information indicating a service level of the signal information at the service intersection, and the search means calculates a link cost of a link flowing into the intersection with the higher service level as the service level. than the link cost of the link that flows into lower the intersection, it is not preferable that is configured to search and set relatively small.

Further, the service intersection information includes information indicating a security level of the signal information at the service intersection, and the search unit calculates a link cost of a link flowing into the intersection having a high security level as the security level. than the link cost of the link that flows into lower the intersection, it is not preferable that is configured to search and set relatively small.

The road device according to the embodiment of the present invention is a road device that transmits information to an in-vehicle device mounted on a vehicle, and a traffic signal that can provide signal information at a predetermined intersection is provided. is for identifying whether the service intersection has, Ru der having means for transmitting a service intersection information to the vehicle-mounted device.

The road device is not particularly limited, as long as the light beacon, can only communicate vehicle data in a narrow area, that Do can be transmitted and received between the vehicle necessary information required.

In addition, the in-vehicle device according to the embodiment of the present invention is an in-vehicle device mounted on a vehicle, and whether a predetermined intersection is a service intersection where a traffic signal capable of providing signal information is installed. for identifying whether or not, means for obtaining service intersection information, based on the service intersection information, Ru and a generating means for generating broadcast information to passengers of the vehicle.

  The in-vehicle device may receive the service intersection information from the road device as described above, or may read the service intersection information stored in the in-vehicle device in advance, and the service intersection information acquisition method is not limited. The in-vehicle device is not limited to a single device, and may be composed of a plurality of devices.

  Moreover, it is preferable that the notification information is image information in which a location of the intersection corresponding to the service intersection is drawn by being superimposed on a road map.

  Moreover, it is preferable that the said alerting | reporting information is audio | voice information showing whether the said intersection is the said service intersection.

  The in-vehicle device further includes search means for setting a cost required to pass the intersection based on the service intersection information, and searching for a guidance route to the destination using the set cost. Is preferably image information drawn by superimposing a guidance route searched by the search means on a road map.

  The service intersection information preferably includes at least one of identification information of the intersection and identification information of a road flowing into the intersection.

  In addition, it is preferable that the service intersection information includes at least one of information about an implementation status of the provision of the signal information at the service intersection and information about a reason for stopping the provision of the signal information.

  The service intersection information preferably includes information indicating a service level of the signal information at the service intersection.

  The service intersection information preferably includes information indicating a security level of the signal information at the service intersection.

  In addition, the notification information is preferably image information in which a guidance route searched so as to pass through a service intersection with a high service level of the signal information preferentially is drawn on a road map.

  As described above, a service intersection with a high signal information service level, that is, a service intersection with a high signal information reliability level, or an implementation level such as a “speed controllable level” or “deceleration instruction level”, etc. At the service intersection, you can receive safe driving support control services with higher safety such as speed control and deceleration instructions, so you can provide the driver with a guidance route that is searched so that the service intersection is given priority. It is desirable to do. If the driver drives along this guidance route, highly safe driving is possible.

  Further, the notification information is preferably image information in which a guidance route searched so as to pass through a service intersection with a high security level of the signal information preferentially is drawn on a road map.

  As described above, at a service intersection with a high security level of signal information, a safe driving support control service with higher safety such as speed control and deceleration instruction can be received. It is desirable to provide the driver with the searched guidance route. If the driver drives along this guidance route, highly safe driving is possible.

  Moreover, it is preferable that the service intersection information includes information on the implementation status of point sensitive control at the service intersection.

  In addition, it is preferable that the notification information is image information in which a guidance route searched so as to pass through a service intersection where point sensitive control is not performed is superimposed and drawn on a road map.

  As described above, there are cases where the service intersection that performs the point sensitive control cannot receive the safe driving support control service. Therefore, it is desirable to provide the driver with a guidance route searched to preferentially pass through a service intersection that is not subjected to point sensitive control and can receive the safe driving support control service. If the driver drives along this guidance route, it is possible to travel with high safety regardless of whether or not the vehicle supports the safe driving support control service. The reason for this is as described above.

  The service intersection information preferably includes traffic regulation information at the service intersection.

An in-vehicle device according to an embodiment of the present invention is an in-vehicle device mounted on a vehicle including means for performing safe driving support control based on signal information, and a predetermined intersection is signal information. And means for acquiring service intersection information for identifying whether or not the traffic intersection is installed with a traffic signal capable of providing traffic information, and creating notification information to passengers of the vehicle based on the service intersection information and a generation means for, the broadcast information, Ru information der indicating whether the safety driving support control in the intersection is performed. Here, the safe driving support control means speed control, deceleration instruction, alerting, etc. as described above. In addition, the notification information may be audio information or image information. Here, the image information includes information represented by characters and information represented by graphics.

  For example, if you are traveling toward a service intersection where signal information is provided, you will be notified by voice that safe driving support control will be implemented, and if you are traveling toward an intersection that is not, If it is notified by voice that the safe driving support control is not performed, the driver can receive the safe driving support control service without being confused even if the service intersection and the other intersection are mixed.

  In addition, for example, when traveling toward a service intersection where signal information is provided, character information indicating that safe driving support control is performed is displayed on the in-vehicle monitor, and toward an intersection where it is not. When driving, if text information indicating that safe driving support control is not implemented is displayed on the on-board monitor, the driver will not be confused and safe driving even if there are service intersections and other intersections. Receive support control services.

The vehicle according to the embodiment of the present invention, Ru vehicle der equipped the car mounting device.

As described above, according to the information providing system according to the embodiment of the present invention, even if there is an intersection where traffic signals that can provide signal information are installed and an intersection that is not, a driver can You can receive safe driving support control services such as speed control, deceleration instructions, and alerts of the safe driving support system.

It is a schematic diagram which shows the outline | summary of the information provision system containing the road apparatus and vehicle equipment which concern on embodiment of this invention. It is explanatory drawing which shows the example of a service intersection table. It is explanatory drawing which shows the example of a point sensitive implementation intersection table. It is explanatory drawing which shows the example of a traffic regulation classification table. It is explanatory drawing which shows the correspondence of an intersection and a link. It is explanatory drawing which shows the example of service intersection information. It is a block diagram which shows the structure of the vehicle-mounted apparatus and other apparatus which are mounted in the vehicle. It is explanatory drawing which shows the example of image data. It is explanatory drawing which shows the example of image data. It is explanatory drawing which shows the example of image data. It is explanatory drawing which shows the example of service intersection information. It is explanatory drawing which shows the example of service intersection information.

Embodiment 1:
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, terms are defined.
"Service traffic signal": A traffic signal that can provide signal information such as lamp color and duration.
“Service intersection”: An intersection where service traffic signals are installed.
“Non-service intersection”: an intersection that is not a service intersection.

FIG. 1 is a schematic diagram showing an outline of an information providing system including a road device and an in-vehicle device according to an embodiment of the present invention. The information providing system includes a road device 1, an in-vehicle device 2, a service traffic signal 3A, a traffic signal 3B, a central device 4, and the like. The central device 4 is a device that provides traffic information and the like, and is installed in a traffic control center. The central device 4 is connected to service traffic signals 3A installed at each of a plurality of service intersections IA, IA,... Via communication lines such as telephone lines, and also to a plurality of non-service intersections IB, IB. ,... Are connected to the traffic signal 3B installed on each of the traffic signals 3B via a communication line such as a telephone line. The service traffic signal 3A is connected to road devices 1, 1,... Installed on each of a plurality of roads flowing into the service intersection IA including the road RA via a communication line such as a telephone line. The traffic signal 3B is connected to road devices 1, 1,... Installed on each of a plurality of roads flowing into the non-service intersection IB including the road RB via a communication line such as a telephone line. The central device 4 may be installed on the road instead of being installed in the traffic control center.

  The roadside device 1 is an optical beacon, a radio wave beacon, a DSRC (Dedicated Short Range Communication), and the like, and wirelessly communicates various types of information with the in-vehicle device 2 mounted on the vehicle 10. The on-road device 1 includes a communication unit 1a that communicates various information with the in-vehicle device 2, and a communication control device 1b that controls the communication unit 1a. The communication control device 1b is provided with a storage unit such as a ROM, and information on the distance from the road device 1 to the intersection at the inflow destination of the road where the road device 1 is installed is stored in advance. For example, information on the distance from the road device 1 to the service intersection IA is stored in advance in the storage unit of the road device 1 installed on the road RA, and also stored in the road device 1 installed on the road RB. In the section, information on the distance from the road device 1 to the non-service intersection IB is stored in advance. In addition, the information of these distances is not limited to the structure memorize | stored previously, The structure acquired and memorize | stored from the central apparatus 4 grade | etc., May be sufficient.

  The road device 1 connected to the service traffic signal 3A has traffic information including traffic regulation information such as speed regulation and lane regulation from the service traffic signal 3A, signal information such as service intersection information, lamp color, and duration time, which will be described later. Is transmitted to the in-vehicle device 2. On the other hand, the road device 1 connected to the traffic signal 3B receives traffic information and service intersection information described later from the traffic signal 3B, and transmits these information and distance information to the in-vehicle device 2. The road device 1 may be configured to directly receive traffic information, service intersection information, and the like from the central device 4, or may be configured such that these pieces of information are stored in advance in the storage unit.

  The service traffic signal 3A includes a traffic signal controller 3aa and a plurality of signal lamps 3b, 3b,. The traffic signal controller 3aa controls lighting, extinguishing and blinking of each signal lamp of the signal lamp device 3b. In addition, the traffic signal 3aa transmits information about the implementation status of signal information to the central device 4. Specifically, whether or not the signal information is provided, and if it is stopped, its cause (traffic signal maintenance, traffic signal abnormality, road equipment maintenance, road equipment abnormality, central equipment Information). In addition, the traffic signal controller 3aa receives traffic information and service intersection information described later from the central device 4, and transmits these information and signal information to the road device 1 connected to the traffic signal controller 3aa.

  The traffic signal 3B is a normal traffic signal, and includes a traffic signal controller 3ab and a plurality of signal lamps 3b, 3b,. The traffic signal controller 3ab is different from the traffic signal controller 3aa in that signal information is not transmitted to the on-road device 1, and information on the implementation status of signal information provision is not transmitted to the central device 4.

  The central device 4 includes a service intersection table for identifying whether each intersection is a service intersection, a point sensitive implementation intersection table indicating the implementation status of point sensitive control for each intersection, and a traffic regulation for each road flowing into the intersection. A traffic regulation type table indicating types is stored in the storage unit of the device.

  FIG. 2 is an explanatory diagram showing an example of a service intersection table. The service intersection table is composed of each column of an intersection ID for identifying an intersection and a service / non-service flag for distinguishing between a service intersection and a non-service intersection. For example, an intersection with an intersection ID of 000001 indicates a service intersection, and an intersection with an intersection ID of 000002 indicates a non-service intersection.

  FIG. 3 is an explanatory diagram showing an example of the point sensitive execution intersection table. The point-sensitive execution intersection table includes an intersection ID for identifying an intersection, a point-sensitive execution / non-execution flag for distinguishing whether or not point-sensitive control is being performed, a start time and an end time of point-sensitive control. It consists of columns. For example, at the intersection having the intersection ID of 000001, the point sensitive control is performed, and the start time of the point sensitive control is 06:00 and the end time is 20:00. Further, for example, at the intersection having the intersection ID of 000002, the point sensitive control is not performed, the start time of the point sensitive control is 16:00, and the end time is 18:00.

  FIG. 4 is an explanatory diagram showing an example of a traffic regulation type table. The traffic regulation type table includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, and a regulation type indicating a traffic regulation type (speed regulation, lane regulation, right turn prohibition, no regulation, etc.). It consists of each column. Here, the link refers to a road between intersections distinguished in the upward direction and the downward direction. For example, a link that flows into an intersection with an intersection ID of 000001 and that has a link ID of 0000001 indicates that speed regulation is being implemented. In addition, for example, a link flowing into an intersection with an intersection ID of 000002 and a link with a link ID of 0000009 indicates that traffic regulation is not implemented. Note that the correspondence between the intersections with intersection IDs of 000001 and 000002 and the links with link IDs of 0000001 to 0000013 is as shown in FIG.

  The central device 4 acquires information on the implementation status of signal information from a plurality of service traffic signals 3A, 3A,... At a predetermined timing (for example, every 5 minutes), and a plurality of service intersections IA, It is determined whether signal information is provided for each IA,. Next, the central device 4 creates service intersection information described below based on the determination result and the service intersection table, the point sensitive execution intersection table, and the traffic regulation type table stored in the storage unit.

  FIG. 6 is an explanatory diagram showing an example of service intersection information. The service intersection information includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, and a service / non-service flag for distinguishing whether the intersection is a service intersection or a non-service intersection. , Information provision execution / non-execution flag for distinguishing whether or not the provision of signal information is performed, causes when signal information provision is stopped (traffic signal maintenance, traffic signal abnormality, road equipment Maintenance reasons, road device abnormalities, stop instructions from the central device, etc.), point sensitive execution / non-execution flag to distinguish whether point sensitive control is being performed, point sensitive control start time And end time, and each type of restriction type indicating the type of traffic restriction.

  For example, in a link with a link ID of 000001 that flows into an intersection with an intersection ID of 000001, the intersection ahead is a service intersection, signal information is being provided, and point sensitive control is being performed. The point sensitive control start time is 06:00 and the end time is 20:00, indicating that speed regulation is being implemented.

  In addition, for example, in the link that flows into the intersection with the intersection ID 000002 and the link ID is 0000009, the intersection ahead is a non-service intersection, the point sensitive control is not performed, and the point sensitive control is started. The time is 16:00 and the end time is 20:00, indicating that traffic regulation is not implemented.

  Also, for example, in a link flowing into an intersection with an intersection ID of 000050 and having a link ID of 0000253, the further intersection is a service intersection and no signal information is provided. Information provision is stopped for maintenance, point sensitive control is not implemented, the start time of point sensitive control is 8:00, the end time is 18:00, and traffic regulation is not implemented Is shown.

  The central device 4 combines the created service intersection information with traffic information including traffic regulation information such as speed regulation and lane regulation, as well as a plurality of service traffic signals 3A, 3A, ... and a plurality of traffic signals 3B, 3B, Send to ...

  The vehicle 10 is equipped with an in-vehicle device 2, and the in-vehicle device 2 wirelessly communicates various information with the on-road device 1. When the vehicle 10 equipped with the in-vehicle device 2 passes through the communication area of the road device 1, the vehicle 10 wirelessly communicates with the road device 1, and the road device 1 connected to the service traffic signal 3 </ b> A receives traffic. Information, service intersection information, signal information, and distance information are acquired, and traffic information, service intersection information, and distance information are acquired from the road device 1 connected to the traffic signal 3B. When the in-vehicle device 2 acquires the service intersection information and the distance information, the in-vehicle device 2 creates notification information described later and provides it to the driver.

  When the vehicle 10 acquires traffic information, signal information, and distance information, that is, when it communicates with the road device 1 connected to the service traffic signal 3A, the following safe driving support control process is performed based on these information I do. That is, the vehicle 10 determines whether or not the service intersection IA can be safely passed in blue. If it is determined that the vehicle 10 can pass, the vehicle 10 travels while maintaining the current speed. The speed is reduced so that the vehicle can be safely stopped at the stop line before the service intersection IA (stop line PA when traveling on the road RA), and the vehicle stops at the stop line. If the traffic information includes traffic regulation information related to the service intersection IA, the speed control is performed in consideration of the traffic regulation. For example, if there is a speed limit of 40 km / h on a road flowing into the service intersection IA, the vehicle 10 performs speed control so as not to exceed 40 km / h. On the other hand, when the vehicle 10 communicates with the on-road device 1 connected to the traffic signal 3B, the signal information cannot be acquired, and thus the safe driving support control process as described above is not performed.

  FIG. 7 is a block diagram showing configurations of the in-vehicle device 2 and other devices mounted on the vehicle 10. The GPS processing unit 201 receives a GPS signal from a GPS satellite, and measures the position (latitude, longitude, and altitude) of the vehicle 10 based on time information included in the GPS signal, an orbit of the GPS satellite, and positioning correction information. . The azimuth sensor 202 is composed of an optical fiber gyro and the like, and measures the azimuth and angular velocity. The vehicle speed acquisition unit 203 acquires the speed data of the vehicle 10 measured by the vehicle speed sensor 101 detecting the angular speed of the wheels. The communication unit 204 receives various information such as traffic information and service intersection information from the road device 1. In addition, the communication unit 204 outputs the received various information to the travel control unit 105.

  The storage unit 205 stores road map data. The road map data includes intersection data in which intersection IDs and intersection positions are associated, link IDs, link start points / end points / interpolation points (corresponding to points where roads are bent), link costs (for example, Link that associates the link ID of the link connected to the link end point with the link ID of the link connected to the link end point. It consists of data. In addition, the storage unit 205 stores various information received by the communication unit 204.

  The display unit 206 displays on the monitor 102 the image data created by the processing unit 208 in a notification information creation process described later. The audio output unit 207 outputs the audio data created by the processing unit 208 in the notification information creation process described later from the speaker 103.

  The processing unit 208 is configured by one or a plurality of microcomputers, and is based on each data of the position measured by the GPS processing unit 201, the azimuth and angular velocity measured by the azimuth sensor 202, and the speed acquired by the vehicle speed acquisition unit 203. Map matching processing is performed, and the position of the vehicle on the link of the road map data stored in the storage unit 205 is obtained. The processing unit 208 performs notification information creation / provision processing described later.

  The travel control unit 105 includes one or more microcomputers, and is based on traffic information acquired from the communication unit 204, signal information and distance information, and speed data of the vehicle 10 acquired from the vehicle speed sensor 101. Perform support control processing. That is, it is determined whether or not the service intersection IA can be safely passed in blue. If it is determined that the service intersection IA can be safely passed, the drive unit (engine) 106 is controlled to maintain the current speed. When it is determined that the vehicle cannot pass, the braking unit (brake) 107 is controlled, the speed is reduced so that the vehicle can be safely stopped at the stop line before the service intersection IA, and the vehicle is stopped at the stop line. When the traffic information includes traffic regulation information related to the service intersection IA, the driving unit 106 and the braking unit 107 are controlled in consideration of the traffic regulation.

  Next, the procedure of the notification information creating / providing process of the in-vehicle device 2 will be described. This process consists of a service intersection display process, a speed control alert process, and a guidance route display process. Each will be described below.

-1. Service intersection display processing-
When the vehicle-mounted device 2 acquires the service intersection information from the road device 1, the vehicle-mounted device 2 refers to the intersection ID of the service intersection information, the information provision execution / non-execution flag, and the intersection data of the road map data stored in the storage unit 205. By referring to the intersection ID and the position of the intersection, image data is drawn by superimposing the location of the service intersection that is providing information on the road map, and displayed on the monitor 102.

  FIG. 8 is an explanatory diagram showing an example of image data. In the drawing, the triangle mark indicates the position of the vehicle 10, the star mark indicates the position of the destination, and the circle mark indicates the position of the service intersection IA that provides information.

  The rider of the vehicle 10 including the driver looks at the image displayed on the monitor 102 to determine which intersection is the service intersection IA where the information provision is performed, that is, at which intersection the speed control is performed. Can be recognized at a glance, so there is no confusion even if there are intersections where speed control is performed and intersections where speed control is not performed.

-2. Speed control alert process-
When the in-vehicle device 2 acquires the service intersection information and the distance information from the road device 1, the vehicle-mounted device 2 refers to the link ID of the link on which the vehicle 10 obtained by the map matching process is running, and provides the link ID and information of the service intersection information. Referring to the execution / non-execution flag, it is determined whether or not the inflow destination intersection of the link on which the vehicle 10 is traveling is the service intersection IA that is providing information. If this determination is affirmative, when approaching the intersection, voice data indicating that speed control may be performed (hereinafter referred to as first voice data) is generated and output from the speaker 103. The first audio data is, for example, “Please note that there is a possibility of automatic speed control”.

  The passenger of the vehicle 10 can recognize in advance whether or not there is a possibility of speed control at the intersection ahead by listening to the first audio data output from the speaker 103. You won't be confused if there is a mixture of intersections with and without intersections.

  In addition, referring to the regulation type of the service intersection information, if it is found that the traffic regulation is implemented at the service intersection IA where the information provision is performed, the first including the type of the traffic regulation is included. Audio data such as “Please note that automatic speed control may be performed based on speed regulation” may be generated and output from the speaker 103. Since the passenger of the vehicle 10 can recognize in advance that the speed control is performed based on the traffic regulation, even if the speed control is performed based on the traffic regulation, there is no confusion.

  In addition, when the above determination is affirmative, the in-vehicle device 2 further refers to the point sensitive execution / non-execution flag in the service intersection information, and the intersection at the inflow destination of the link on which the vehicle 10 is traveling is determined. It is determined whether or not the point sensitive control is performed. If this determination is affirmative, voice data indicating that the speed control may not be performed for the point sensitive control (hereinafter referred to as the second point control). Audio data) and output from the speaker 103 together with the first audio data. The second audio data is, for example, “Please note that automatic control of speed may not be performed for point sensitive control.”

  Even if this is a service intersection IA that is providing information, if point sensitive control is performed, the duration of the light color may not be determined in advance, and the speed depends on the timing at which the vehicle 10 enters. This is because control may not be performed.

  A passenger of the vehicle 10 may not perform speed control for point sensitive control at the service intersection IA that provides information by listening to the second audio data output from the speaker 103. Can be recognized in advance, so there is no confusion even if speed control is not performed at the intersection.

  The determination as to whether or not the vehicle is approaching an intersection is performed as follows. That is, the in-vehicle device 2 calculates the travel distance from the time when various information is received from the road device 1 based on the vehicle speed, and subtracts this travel distance from the distance from the road device 1 to the service intersection IA included in the distance information. Then, the distance from the vehicle 10 to the service intersection IA is obtained, and if this distance becomes a predetermined value (for example, 150 m) or less, it is determined that the vehicle is approaching the intersection.

-3. Guide route display process-
When the in-vehicle device 2 obtains the service intersection information from the road device 1, the in-vehicle device 2 searches for a guidance route to the destination so as to pass through the service intersection IA that is providing the information, and the guidance route is searched for the road map. The image data drawn by superimposing on is displayed on the monitor 102. The destination is preset by a driver or the like.

  If the driver drives along this guidance route, the rate of passing through the service intersection IA that provides information increases, so for example, the rate at which speed control is not performed decreases, and safety due to speed control being performed. The driver who expects to improve the performance will not be confused.

  In addition, since the speed control is performed at the service intersection where information is provided, safety is high. Therefore, if the driver drives along this guidance route, the rate at which speed control is performed increases, so that traveling with high safety becomes possible.

  On the other hand, even if the travel control unit 105 is not mounted on the vehicle 10 and the vehicle 10 cannot perform speed control, if the driver drives along this guidance route, highly safe travel is possible. It becomes possible. This is because, at the service intersection IA that provides information, at least the vehicle that can perform speed control is traveling safely, so for example, the percentage of vehicles that enter the service intersection IA in red is small. Since no speed control is performed at any of the service intersections IA and non-service intersections IB that do not provide information, it cannot be said that such a ratio is small. This is because it can be said that the safety of passing through the intersection IA is higher than that of passing through the service intersection IA and the non-service intersection IB that do not provide information.

  Specifically, the in-vehicle device 2 refers to the link ID of the service intersection information and the information provision execution / non-execution flag, and extracts the link ID of the link flowing into the service intersection IA that provides the information, The link cost of the link ID of the link data included in the road map data is corrected to be small. For example, the original link cost is corrected to a value obtained by multiplying a predetermined coefficient (for example, 0.8). Or it correct | amends to the value which deducted the predetermined value from the original link cost. And it searches for the guidance route to the destination so that the total value of the link cost is minimized. As a search method, a Dijkstra method or the like may be used.

  FIG. 9 is an explanatory diagram illustrating an example of image data. In the figure, the triangle mark indicates the position of the vehicle 10, the star mark indicates the position of the destination, the circle mark indicates the position of the service intersection IA that provides information, and the bold line indicates the guidance route.

  Even in the case of the service intersection IA that provides information, if point sensitive control is being performed, speed control may not be performed depending on the timing of entering the intersection as described above. Therefore, it is desirable to correct the link cost of the link flowing into the service intersection IA to a relatively larger value than the link cost of the link flowing into the service intersection IA that is not performing point sensitive control. For example, the original link cost is corrected to a value multiplied by a coefficient (for example, 0.9) larger than the predetermined coefficient. Then, the information is provided via the service intersection IA that is providing information and not performing point-sensitive control than the service intersection IA and non-service intersection IB that are not providing information. Since information is provided rather than the service intersection IA that has been implemented and the point sensitive control is not performed, the guidance route is searched through the service intersection IA that has performed the point sensitive control. If the driver drives along this guidance route, the rate at which the speed control is performed becomes higher, and the driver who expects to improve safety will not be confused.

  In the above-described embodiment, the road device 1 is configured to transmit service intersection information to all the in-vehicle devices 2, but is not limited to this, and the vehicle 10 from the in-vehicle device 2 performs a safe driving support process. The configuration may be such that the service intersection information is transmitted to the in-vehicle device 2 only when the information indicating that can be executed is received.

  In the above-described embodiment, the in-vehicle device 2 is configured to acquire service intersection information from the road device 1, but is not limited thereto, and is configured to be acquired through a mobile phone connected to the in-vehicle device 2. Alternatively, it may be obtained through media such as radio broadcasting. Further, the service intersection information may be stored in the storage unit 205 in advance and acquired from the storage unit 205, or may be acquired from a storage medium such as a CD-ROM in which the intersection information is recorded. Also good.

  In the above-described embodiment, the in-vehicle device 2 is configured to create image data drawn by superimposing the location of the service intersection IA providing information on the road map, but the present invention is not limited to this. Instead, it may be configured to create image data in which the location of the service intersection IA is superimposed on a road map regardless of whether information is provided or not.

  In the above-described embodiment, the vehicle-mounted device 2 is configured to create voice data indicating that speed control may be performed when approaching the service intersection IA that is providing information. Regardless of whether information is provided or not, even if the service intersection IA is approached, voice data that the intersection is the service intersection is created and announced to the driver. good. Further, when approaching the non-service intersection IB, voice data indicating that the next intersection is a non-service intersection may be created and announced to the driver.

  In the above-described embodiment, the vehicle-mounted device 2 is configured to create voice data indicating that speed control may be performed when approaching the service intersection IA that is providing information. The configuration is not limited, and image data indicating that there is a possibility of speed control may be created. This image data is desirably displayed on the monitor 102 or projected onto the windshield using a projector (not shown). FIG. 10 is an explanatory diagram illustrating an example of image data. FIG. 10A shows an example of image data displayed on the monitor 102, and FIG. 10B shows an example of image data projected on the windshield.

  In the above-described embodiment, the vehicle-mounted device 2 is configured to create voice data indicating that speed control may be performed when approaching the service intersection IA that is providing information. The present invention is not limited, and a configuration may be used in which voice data or image data indicating that speed control is not performed is generated when approaching a service intersection IA or a non-service intersection IB that is not providing information. It is particularly useful when the percentage of service intersections IA that provide information is high, and the driver can realize that he / she has to drive without receiving a safe driving support control service.

  In this case, when approaching the service intersection IA that is not providing information, the reason for the provision stop may be announced by voice. For example, if the service stop signal is abnormal for the service traffic signal 3A, the service traffic signal 3A is not operating normally, so the driver may recognize in advance that the driver needs attention when passing the service intersection IA. If the reason for stopping the service is an abnormality in the road apparatus 1, the service traffic signal 3A is operating normally, so that the driver recognizes in advance that no attention is required when passing the service intersection IA. This is useful for drivers.

  In the above-described embodiment, the vehicle-mounted device 2 is configured to create voice data indicating that speed control may be performed when approaching the service intersection IA that is providing information. It is not limited, and voice data or image data indicating that speed control may be performed is created at the service intersection IA that provides one or a plurality of information on the guidance route to the destination. It may be a configuration. For example, “Please note that there is a possibility of automatic speed control at three intersections until the next right turn.” Or “Automatic speed control while driving on this national highway ○. May be continued, please be careful. " Moreover, the structure which produces the audio | voice data or image data to the effect that speed control is not performed in the service intersection IA or the non-service intersection IB which is not implementing one or more information provision on the said path | route may be sufficient.

  In the above-described embodiment, the in-vehicle device 2 is configured to search for a guidance route to the destination by setting the link cost of the link flowing into the service intersection IA that is providing information small. The present invention is not limited to this, and is a configuration for searching for a guidance route to a destination by setting a large link cost of a link flowing into a service intersection IA and a non-service intersection IB that are not providing information. Also good. Even in this configuration, it is possible to search for a guidance route that preferentially passes through the service intersection IA that provides information.

  In the above-described embodiment, the in-vehicle device 2 searches for a route that minimizes the total value of the link costs in order to obtain a guide route that preferentially passes through the service intersection IA that provides information. However, the present invention is not limited to this, and a service intersection that searches for a plurality of guide routes whose total link cost is within a predetermined range and provides information from these guide routes. It may be configured to select the one having the highest rate of passing through IA.

  In the above-described embodiment, the in-vehicle device 2 is configured to search for a guidance route that preferentially passes through the service intersection IA that provides information, but is not limited thereto, and is provided with information. Regardless of whether or not is implemented, it may be configured to search for a guidance route that preferentially passes through the service intersection IA.

  In the above-described embodiment, the service intersection information includes information for distinguishing whether or not point sensitive control is being performed, and information on the start time and end time of point sensitive control. However, the present invention is not limited to this, and the service intersection information may further include information indicating the type of point sensitive control. There are several types of point sensitive control. For example, in addition to the right turn sensitive control, there is a bus sensitive control that extends a blue signal based on a sensing signal from a vehicle sensor that senses a bus. Further, it may be configured to include information on the light color of a signal that may be actually extended by point sensitive control. For example, in the case of right turn sensitive control, a right turn blue arrow light is an object to be extended. With these configurations, it is possible to provide more detailed information to the driver.

Embodiment 2:
The present embodiment is different from the above-described first embodiment in that the information indicating the service level of the signal information is included in the service intersection information, and the safe driving support according to the information indicating the service level of the vehicle 10 It is a point to perform control processing. Here, the service level refers to information including at least one of a reliability level representing high reliability of signal information and an implementation level representing the content of the safe driving support control service that can be implemented by the vehicle. .

  When the signal information is transmitted from the service traffic signal 3A to the in-vehicle device 2 mounted on the vehicle 10 via the road device 1, the signal information includes the communication time between the service traffic signal 3A and the road device 1, After the processing time of the road device 1 and the communication time between the road device 1 and the in-vehicle device 2 have elapsed, the vehicle device 2 is reached. For example, if the signal information is the light color “blue” and the duration time “10 seconds”, if the total time of the communication time and the processing time (this is called the delay time) is 1 second. Since the in-vehicle device 2 receives the above signal information when the blue duration becomes 9 seconds, the actual blue duration and the received blue duration are 1 of the delay time. It will be off by the second. The delay time may vary depending on the communication quality of the communication path, the processing capability of a router device (not shown) on the communication path, and the like.

  Therefore, when the delay time and its variation are small, the difference between the actual lamp color duration and the received lamp color duration is small, so it can be said that the signal information is highly reliable. When the fluctuation is large, it can be said that the signal information has low reliability. Note that the delay time and the degree of variation thereof are the number of router devices on the communication path, the communication speed of the communication path through which the signal information passes, and other communication information transmitted and received using the communication path. It depends on factors such as the presence / absence and the presence / absence of other devices that communicate using the communication path.

  For each link that flows into each service intersection IA, IA,..., The central device 4 stores reliability level information representing the high reliability of the signal information provided on the link in the storage unit. doing. The reliability level is expressed in three levels, “high”, “standard”, and “low”. Note that the reliability level is not limited to this expression. For example, the reliability level may be expressed as a delay time “small”, a fluctuation “large”, or the like depending on the delay time and the magnitude of the fluctuation.

  The central device 4 further adds the reliability level information to the service intersection information described in the first embodiment, and transmits it to the service traffic signals 3A, 3A,... And the traffic signals 3B, 3B,. To do. FIG. 11 is an explanatory diagram illustrating an example of service intersection information. For example, in a link that flows into an intersection with an intersection ID of 000001 and a link ID of 0000001, the reliability level of signal information provided in the link is “high”, and an intersection with an intersection ID of 000001 In the link with the link ID of 0000002 that flows into the link, the reliability level of the signal information provided in the link is “standard”, and the link ID that flows into the intersection with the intersection ID of 000050 has the link ID of 0000253. In a certain link, the reliability level of signal information provided in the link is “low”.

  When the vehicle 10 receives service intersection information from the road device 1 connected to the service traffic signal 3A, the vehicle 10 supports safe driving according to the reliability level information of the service intersection IA included in the service intersection information. Perform control processing. That is, while referring to the link ID of the link on which the vehicle 10 obtained by the map matching process is traveling, the vehicle 10 travels with reference to the link ID of the service intersection information, the information provision execution / non-execution flag, and the reliability level. It is determined whether or not the service intersection IA at the inflow destination of the link being provided provides information, and if it is implemented, if the reliability level is “high”, it is described in the first embodiment. Performs safe driving support control processing for speed control.

  On the other hand, if the reliability level is “standard”, referring to the signal information, the light color of the previous service intersection IA is blue, and the duration time is less than a predetermined number of seconds (for example, 3 seconds). If there is, the driver will be notified by voice that the light color will soon switch from blue to yellow, and will be alerted. Further, if the reliability level is “low”, the vehicle 10 does not perform the safe driving support control process.

  As described above, the vehicle 10 performs the safe driving support control process according to the reliability level. In the safe driving support control process for alerting, the signal information does not require so high reliability, but the speed control safe driving is performed. This is because very high reliability is required for the signal information in the assistance control processing. That is, for example, when the signal information is the light color “blue” and the duration time “10 seconds”, if the delay time is 1 second, the in-vehicle device at the time when the blue duration time becomes 9 seconds 2 receives the signal information, the actual blue continuous time and the received blue continuous time are shifted by 1 second of the delay time. However, as described above, the lamp color is changed from blue to yellow. If the driver informs the driver that the light color will soon switch from blue to yellow 3 seconds before switching to, even if the light color does not switch from blue to yellow after 3 seconds, it actually switches after 2 seconds. For drivers, it must be “soon”. Therefore, in the safe driving support control process for alerting, the delay time and its variation do not have much influence.

  On the other hand, in the case of speed control, if the vehicle 10 is traveling at a speed of 90 km / h, the vehicle 10 travels 25 m within 1 second, so the light color actually turns from blue to yellow after 9 seconds. Since the position of the vehicle 10 at that time is in front of the stop line, the vehicle 10 should be controlled to decelerate and stop, but the vehicle 10 erroneously recognizes that it will switch after one second, Since it has been determined that the position of the vehicle 10 at that time is after passing the stop line further advanced by 25 m, the vehicle 10 may be erroneously controlled to maintain the speed. Therefore, in the safe driving support control process of speed control, the delay time and its variation have a great influence.

Therefore, according to the embodiment of the present invention, the driver can receive an appropriate safe driving support control service according to the high reliability of the signal information.

  Instead of the reliability level, an execution level that represents the content of the safe driving support control process that can be performed by the vehicle 10 may be used. The implementation level is expressed by, for example, “a level capable of speed control”, “a level capable of calling attention”, and “a simple reference information level”. In this case, the vehicle 10 performs speed control if the execution level is “level capable of speed control”, alerts if the execution level is “level capable of calling attention”, and the execution level is “mere reference information”. If it is “level”, the safe driving support control process is not performed.

  When the in-vehicle device 2 receives the service intersection information from the road device 1, as described in the first embodiment, the in-vehicle device 2 preferentially passes through the service intersection IA that provides the information, and the guidance route to the destination And the image data drawn by superimposing on the road map is displayed on the monitor 102. At the time of the search, the link cost of the link whose signal information reliability level is “high” is set to “ Correct to a value that is relatively smaller than the cost of a link that is “standard”, and the cost of a link that is “low” at the same level is less than the cost of a link that is “standard”. Correct to a relatively large value.

  As a result, the guide route is searched so as to go through the link with a high reliability level as much as possible, and avoid the link with a low reliability level as much as possible. However, since the rate at which the safety support control process of higher speed control is performed becomes high, it is possible to travel with high safety.

Embodiment 3:
This embodiment is different from the above-described first embodiment in that information indicating the security level of signal information is included in the service intersection information, and that the vehicle 10 provides safe driving support according to the information indicating the security level. It is a point to perform control processing. Here, the security level refers to a high level of signal information safety due to processing such as encryption and encoding.

  For each link that flows into each service intersection IA, IA,..., The central device 4 stores information on the security level of the signal information provided on the link in the storage unit. The security level is expressed in three levels: “high”, “standard”, and “low”. The security level is not limited to this expression. When signal information is encrypted using a public key method or a secret key method, the longer the length of these keys, the more Because it becomes difficult to decrypt and increases security, the length of the key may be expressed as “Large”, “Standard”, “Small”, or “100 bytes”. It may be expressed by the key length itself.

  The central device 4 further adds the security level information to the service intersection information described in the first embodiment, and transmits it to the service traffic signals 3A, 3A,... And the traffic signals 3B, 3B,. . FIG. 12 is an explanatory diagram illustrating an example of service intersection information. For example, in a link that flows into an intersection with an intersection ID of 000001 and a link ID of 0000001, the security level of the signal information provided in the link is “high”, and the intersection with the intersection ID of 000001 In the link with the link ID “0000002”, the security level of the signal information provided in the link is “standard”, and the link with the link ID “0000253” flows into the intersection with the intersection ID “000050”. Then, the security level of the signal information provided in the link is “low”.

  When the vehicle 10 receives the service intersection information from the road device 1 connected to the service traffic signal 3A, the vehicle 10 performs safe driving support control according to the security level information of the service intersection IA included in the service intersection information. Process. That is, referring to the link ID of the link on which the vehicle 10 traveled acquired by the map matching process is referred to, the vehicle 10 travels with reference to the link ID of the service intersection information, the information provision execution / non-execution flag, and the security level. It is determined whether or not the service intersection IA at the inflow destination of the link is providing information, and if it is implemented, if the security level is “high”, the speed control described in the first embodiment The safe driving support control process is performed. On the other hand, if the security level is “standard”, the warning driving support control described in the embodiment 2 is performed, and if the security level is “low”, the vehicle 10 does not perform the safe driving support control process. .

The reason why the vehicle 10 performs the safe driving support control process according to the security level in this manner is that the signal information requires very high safety in the speed driving safe driving support control process. For example, when a camouflaged road device (not shown) that intercepts signal information from the service traffic signal 3A to the vehicle 10 and creates false signal information and provides the vehicle 10 is installed, Intercept signal information whose light color is red, create false signal information whose light color is blue, and provide it to the vehicle 10, the vehicle 10 does not perform deceleration control by trusting the false signal information. This is because there is a risk that a traffic accident may be caused by entering the intersection in red. Therefore, according to the embodiment of the present invention, the driver can receive an appropriate safe driving support control service according to the security level of the signal information.

  When the in-vehicle device 2 receives the service intersection information from the road device 1, as described in the first embodiment, the in-vehicle device 2 preferentially passes through the service intersection IA that provides the information, and the guidance route to the destination The image data drawn by superimposing on the road map is displayed on the monitor 102. In the search, the link cost of the link whose security level of the signal information is “high” is set to “standard”. ”Is corrected to a value that is relatively smaller than the cost of a link that is“ ”, and the cost of a link that is“ low ”at the same level is relative to the cost of a link that is“ standard ”at the same level. To a larger value.

  As a result, a guidance route is searched so as to pass a link with a high security level as much as possible and avoid a link with a low security level as much as possible. Since the rate at which the safety support control process of high speed control is performed increases, it is possible to travel with high safety.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Road apparatus 1a Communication part 1b Communication control apparatus 2 Car-mounted apparatus 201 GPS processing part 202 Direction sensor 203 Vehicle speed acquisition part 204 Communication part 205 Storage part 206 Display part 207 Audio | voice output part 208 Processing part 3A Service traffic signal 3aa, 3ab Traffic signal control Machine 3b Signal lamp 3B Traffic light 4 Central device 10 Vehicle 101 Vehicle speed sensor 102 Monitor 103 Speaker 105 Travel control unit 106 Drive unit 107 Braking unit IA Service intersection IB Non-service intersection PA Stop line RA, RB Road

Claims (3)

An in-vehicle device mounted on a vehicle,
Intersection the predetermined object, it is identifiable whether the installed services intersection of possible traffic signals provide signal information, and is the intersection provides the signal information is implemented Means for acquiring service intersection information , which can be identified whether or not ,
Creating means for creating notification information to passengers of the vehicle based on the service intersection information;
In-vehicle device. The service intersection information includes at least one of identification information of the intersection and identification information of a road flowing into the intersection.
The in-vehicle device according to claim 1. The service intersection information includes traffic regulation information at the service intersection.
The in-vehicle device according to claim 1 or 2.

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