JP2010250850A - Information providing system, on-road device, on-vehicle device and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information providing system capable of providing appropriate information to a driver for reducing potential risks which are associated with a right turn at an intersection. <P>SOLUTION: An on-road device 1 receives from a traffic signal 3 traffic information, including information on traffic control such as speed limit and lane control, and information on right-turn response intersections for determining whether each intersection is one where the right turn response control is permitted, and sends the information to an on-vehicle device 2. The on-vehicle device 2 performs a correction so that the cost for a right turn at a link that flows into an intersection, where the right turn response control that is permitted becomes small, based on the received information on right turn response intersections; searches for guidance route to a destination; and displays on a monitor the image data, in which the guidance route is superimposed on a road map. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information providing system, a road device, an in-vehicle device, and a vehicle in which a road device and an in-vehicle device provide information necessary for driving a driver in cooperation.

  Install a vehicle detector on the right turn lane on the inflow to the intersection, measure the right turn vehicle gap (inter-vehicle time) based on the vehicle detector, and turn the traffic light on the right turn vehicle according to the presence or absence of the gap. Right turn sensitive control for determining the display time of an arrow light (hereinafter referred to as a right turn arrow) is performed (Patent Document 1).

  About the display time of the right turn arrow is determined in a range determined in advance according to the time zone, for example, if the vehicle does not travel in the right turn dedicated lane even after the start of the right turn arrow display, End the display of the right turn arrow at the minimum time of the range. On the other hand, if the vehicle passes through the right-turn exclusive lane without interruption after the start of the right-turn arrow display, the right-turn arrow is displayed until the maximum time (maximum extension limit) in the range in consideration of the system control of the traffic signal.

  Also, in the right turn sensitive control, an operation such as extending a right turn arrow is executed using a set unit extended green time parameter. The unit extended blue time is a unit time for extending the right-turn arrow being displayed when the vehicle detector detects the passage of the vehicle. If the passage of the following vehicle is not detected within the unit time, it is determined that a gap has occurred in the vehicle train, and the right turn arrow is turned off (discontinued) after the unit time has elapsed. That is, if the vehicle continues to be sensed within the unit time, the display of the right turn arrow is extended each time and continues to be displayed until the maximum time.

JP 2006-251910 A

  In times of heavy traffic, right turn vehicles waiting for traffic lights with red traffic lights are often stopped for a long time until the right turn arrow starts to be displayed due to the effect of a straight ahead vehicle that has turned green. . Therefore, when the right turn arrow starts to appear, there is a feeling that you want to pass through the intersection as soon as possible before the right turn arrow disappears, touching the vehicle ahead from that impatience, or causing a right-handed collision accident A potential danger is assumed.

  At the intersection where the right turn sensitive control is performed, the display time of the right turn arrow is appropriately extended according to the traffic demand of the right turn vehicle. Therefore, there is a high probability that the driver can safely pass through the intersection without being impatient. However, a general driver often does not know the existence of a traffic signal control method called right turn sensitive control, and even if he knows right turn sensitive control, there is no way to know at which intersection.

  Accordingly, an object of the present invention is to provide an information providing system capable of providing appropriate information to a driver in order to reduce a potential danger associated with a right turn at an intersection.

  The information providing system according to the present invention is an information providing system that transmits information from a road device to an in-vehicle device, and the road device has a predetermined intersection at an intersection where right turn sensitive control is permitted. Means for transmitting right turn sensitive intersection information for identifying whether or not there is an on-vehicle device, and the on-vehicle device is mounted on the basis of the right turn sensitive intersection information received from the road device. And creating means for creating notification information to the passenger of the vehicle.

  Here, right-turn sensitive control means installing a vehicle detector in the right-turn exclusive lane in the inflow path to the intersection, and measuring the gap (inter-vehicle time) of the right-turn vehicle based on the vehicle detector. The traffic signal control method which determines the display time of the right turn arrow of a traffic signal according to it.

  For example, the road device transmits right turn sensitive intersection information for identifying whether an intersection included in road map data stored in the in-vehicle device is an intersection for which right-turn sensitive control is permitted, to the in-vehicle device. Based on the right turn sensitive intersection information, the in-vehicle device creates image information in which the location of the intersection for which right turn sensitive control is permitted is superimposed on the road map, and displays the image information on the in-vehicle monitor. As a result, the vehicle occupant including the driver can recognize in advance which intersection is an intersection for which right-turn sensitive control is permitted, so the driver can turn right at the intersection with a margin. Therefore, the potential danger associated with a right turn at an intersection can be reduced.

  It is preferable as a specific example if the right turn sensitive intersection information includes at least one of identification information of the intersection and identification information of a road flowing into the intersection (Claim 2).

  For example, the right turn sensitive intersection information may be information in which a number for identifying an intersection is associated with a flag indicating whether the intersection is an intersection for which right turn sensitive control is permitted. Alternatively, the right turn sensitive intersection information may be information in which a number for identifying a road flowing into the intersection is associated with a flag indicating whether or not the intersection is an intersection for which right turn sensitive control is permitted. This is useful because the driver can recognize in advance whether or not there is a possibility that right turn sensitive control will be performed at an intersection ahead of each road. The right turn sensitive intersection information associates a number for identifying an intersection, a number for identifying a road flowing into the intersection, and a flag indicating whether or not the intersection is an intersection for which right turn sensitive control is permitted. It may be information.

  Moreover, it is preferable that the right turn sensitive intersection information includes information on a permitted time zone at an intersection where right turn sensitive control is permitted.

  Depending on the intersection, the time zone in which right-turn sensitive control is permitted may be limited, so if the right-turn sensitive intersection information includes information about the relevant time zone, the driver can determine which intersection is present or in the future. It is useful because it is possible to recognize whether the intersection is permitted to perform right turn sensitive control.

  In addition, it is preferable that the right turn sensitive intersection information includes information about a display time of a right turn vehicle blue arrow light at an intersection where right turn sensitive control is permitted (claim 4).

  The display time of the blue arrow light for the right turn vehicle (right turn arrow) is determined within the range determined in advance according to the time zone, etc. For example, even after the right turn arrow display starts, the vehicle runs on the right turn dedicated lane If not, the display of the right turn arrow is terminated at the minimum time in the range. On the other hand, if the vehicle passes through the right-turn exclusive lane without interruption after the start of the right-turn arrow display, the right-turn arrow is displayed until the maximum time (maximum extension limit) in the range in consideration of the system control of the traffic signal.

  For example, if the right turn sensitive intersection information contains information on the maximum time of the right turn arrow display at an intersection where right turn sensitive control is permitted, the longer the maximum time, the more likely it is to turn right between the right turn arrows. Therefore, when making a right turn at the intersection, the driver can recognize in advance whether or not there is a high possibility of making a right turn between the right turn arrows, so the driver can make a right turn with a margin.

  Further, it is preferable that the right turn sensitive intersection information includes information on a unit extended green time of right turn sensitive control at an intersection where right turn sensitive control is permitted.

  Here, the unit extended blue time is a unit time for extending the right turn arrow being displayed when the vehicle detector detects the passage of the vehicle. If the passage of the following vehicle is not detected within the unit time, it is determined that a gap has occurred in the vehicle train, and the right turn arrow is turned off (cut off) after the unit time has elapsed. That is, if the vehicle continues to be sensed within the unit time, the display of the right turn arrow is extended each time and continues to be displayed until the maximum time.

  For example, the in-vehicle device calculates the maximum inter-vehicle distance obtained by multiplying the unit extended green time included in the right turn sensitive intersection information by the speed of the vehicle driven by the driver, and whether the inter-vehicle distance from the preceding vehicle is greater than the maximum inter-vehicle distance. If it is larger, the driver is notified by voice so as to reduce the inter-vehicle distance from the preceding vehicle. If the inter-vehicle distance from the preceding vehicle is greater than the maximum inter-vehicle distance, the driver's vehicle will detect the vehicle sensor before the unit extended green time elapses after the preceding vehicle is detected by the vehicle detector in the right turn exclusive lane. This is because the right turn arrow is cut off before the driver's vehicle turns right and stops at a red light. As a result, the driver can travel while maintaining an appropriate distance from the preceding vehicle so that the right turn arrow is not cut off.

  Moreover, the road device in 2nd invention is a road device used for said information provision system (Claim 6).

  Although the said road device is not specifically limited, if it is an optical beacon, since it can communicate data with a vehicle only within a narrow area | region, it will become possible to transmit / receive required information only between required vehicles. (Claim 7).

  Moreover, the vehicle-mounted device mounted on the vehicle in the third invention is a right turn sensitive intersection information for identifying whether or not the predetermined target intersection is an intersection for which right turn sensitive control is permitted. And means for creating notification information for passengers of the vehicle based on the right-turn sensitive intersection information (claim 8).

  The in-vehicle device may receive the right turn sensitive intersection information from the road device as described above, or may read the right turn sensitive intersection information stored in advance in the in-vehicle device, and the right turn sensitive intersection information acquisition method is as follows. It doesn't matter. The in-vehicle device is not limited to a single device, and may be composed of a plurality of devices.

  The notification information is preferably image information in which the location of an intersection where right turn sensitive control is permitted is drawn superimposed on a road map.

  For example, if an on-vehicle monitor displays an image of the intersection where a right turn sensitive control is permitted on a road map, the driver can recognize at a glance at which intersection the right turn sensitive control is permitted. The driver can turn right at the intersection with a margin. Therefore, the potential danger associated with a right turn at an intersection can be reduced.

  Moreover, it is preferable that the said alerting | reporting information is audio | voice information showing whether the said intersection is an intersection in which right-turn sensitive control is permitted (Claim 10).

  For example, when driving toward an intersection where right turn sensitive control is permitted, if the driver is notified by voice, the driver may perform right turn sensitive control at the intersection ahead. Therefore, when making a right turn at the intersection, it is possible to make a right turn with a margin.

  The in-vehicle device includes search means for searching for a guide route to a destination, and the notification information is image information in which the guide route searched by the search means is superimposed on a road map, and the search means It is preferable to search by setting the cost required for passing an intersection where right-turn sensitive control is permitted relatively smaller than the cost required for passing an intersection where right-turn sensitive control is not permitted.

  In the right turn sensitive control, the display time of the right turn arrow is determined according to the demand of the right turn vehicle. Therefore, at the intersection where the right turn sensitive control is performed, the probability that the right turn vehicle is stopped by a red signal becomes very small. Also, at intersections where right-turn sensitive control is implemented, if the traffic demand of right-turn vehicles is small, the right-turn arrow display will be cut off as much as necessary, and the right of traffic will be given to the intersection quickly. Even for the left turn car, the time to stop by the red light becomes small.

  On the other hand, in the navigation device, in addition to the cost required to pass the link (road between the intersections), the cost required to pass the intersection, that is, the cost required to go straight, right turn, left turn at the intersection, Although the search for the guidance route to the ground is being performed, it is not considered at all whether or not the right turn sensitive control is performed at the intersection when setting the cost required for passing the intersection.

  Therefore, when passing through an intersection where right-turn sensitive control is being performed, the cost of passing is smaller than when passing through an intersection where right-turn sensitive control is not performed, although the cost required for passing is small. Since the cost is set, the driver may not be provided with the best guide route according to reality.

  Therefore, the guidance route is searched by setting the cost required for passing an intersection where right-turn sensitive control is permitted to be relatively smaller than the cost required for passing an intersection that is not permitted, and this guidance route is searched for on a road map. If the image information superimposed on the driver is provided to the driver, the driver can obtain the best guide route in accordance with the reality, which is very useful.

  The cost required for passing the intersection is preferably the cost required for a right turn at the intersection.

  This is because, in particular, the cost required for a right turn differs between an intersection where right-turn sensitive control is performed and an intersection where it is not performed.

  Further, it is preferable that the right turn sensitive intersection information includes at least one of identification information of the intersection and identification information of a road flowing into the intersection.

  The right turn sensitive intersection information preferably includes at least one of identification information of the intersection and identification information of a road flowing into the intersection (claim 12).

  In addition, it is preferable that the right turn sensitive intersection information includes information on the display time of the blue arrow light for a right turn vehicle at an intersection where right turn sensitive control is permitted (claim 13).

  Further, it is preferable that the right turn sensitive intersection information includes information on the unit extended blue time of the right turn sensitive control at the intersection where the right turn sensitive control is permitted.

  A vehicle according to a fourth aspect of the invention is a vehicle equipped with the on-vehicle device (claim 15).

  As described above, according to the information providing system of the present invention, the driver can recognize in advance whether an intersection about to turn right is an intersection for which right turn sensitive control is permitted. Therefore, since the driver can turn right at the intersection with a margin, the potential danger associated with the right turn at the intersection can be reduced.

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 this invention. It is explanatory drawing which shows the example which determines the display time of the right turn arrow in right turn sensitive control. It is explanatory drawing which shows the example by which a right turn arrow is cut off at the time of unit extension blue time progress by a preceding vehicle. It is explanatory drawing which shows the example of a right turn sensitive intersection table. It is explanatory drawing which shows the example of a right turn arrow display time table. It is explanatory drawing which shows the correspondence of an intersection and a link. It is explanatory drawing which shows the example of right turn sensitive 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.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 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 the present invention. The information providing system includes a road device 1, an in-vehicle device 2, a traffic signal device 3, 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 may be installed on the road instead of being installed in the traffic control center. The central device 4 is connected to a traffic signal 3 installed at each of a plurality of intersections via a communication line such as a telephone line. The traffic signal 3 is connected to a road device installed on each of a plurality of roads flowing into the intersection I including the road R via a communication line such as a telephone line.

  The road device 1 is an optical beacon, a radio beacon, a DSRC (Dedicated Short Range Communication), a WiMAX (Worldwide interoperability for microwave access), and the like. Wirelessly communicate information. 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 road device 1 receives traffic information including traffic regulation information such as speed regulation and lane regulation and right turn sensitive intersection information described later from the traffic signal 3 and transmits these information to the in-vehicle device 2. The road device 1 may be configured to directly receive traffic information and right turn sensitive intersection information from the central device 4, or may be configured such that these pieces of information are stored in advance in the storage unit.

  The traffic signal 3 includes a traffic signal controller 3a and a plurality of signal lamps 3b. The traffic signal controller 3a controls lighting, extinction and blinking of the blue, red, yellow and right turn signal lights of the signal lamp 3b, and a vehicle detector (not shown) installed in the right turn lane under predetermined conditions. ) Right turn sensitive control is executed based on the vehicle detection signal.

  FIG. 2 is an explanatory diagram showing an example of determining the display time of the right turn arrow in the right turn sensitive control. Here, four display patterns of right-turn arrows are illustrated (patterns A to D). In each pattern, a display example of the signal lamp 3b is shown in the upper stage, an example of the vehicle detection signal in the vehicle detector is shown in the middle stage, and an example of the unit extension operation by the right turn sensitive control is shown in the lower stage.

  The display of the upper signal lamp 3b indicates the state of the signal lamp color from the start of the display of the right turn arrow to the display of the red signal to be displayed next. The vehicle detection signal in the middle indicates whether or not there is a vehicle in the vehicle detection area of the vehicle detector after the start of the right turn arrow display. When the vehicle enters the vehicle detection area, the detection signal rises. The sensing signal falls at the time of exiting (passing). The unit extension operation in the lower part shows how the unit extension blue time is measured by a timer counter or the like from the time when the exit (passage) of the vehicle is detected. The hatched arrow symbol in the figure indicates the unit extension operation. Refers to the unit extended blue hour.

  Pattern A shows an example in which there is no passing vehicle between the start of displaying the right turn arrow and the minimum time has elapsed, so that the right turn arrow is aborted when the minimum time has elapsed without performing the unit extension operation.

  In Pattern B, there is a passing vehicle between the start of the display of the right turn arrow and the elapse of the minimum time, and the unit extension operation was performed sequentially according to the passing of the vehicle, but the unit extension by the unit extension operation performed at the end Since the minimum time has passed without detecting the passing of the next vehicle by the lapse of the blue time, an example in which the right turn arrow is cut off at the time when the minimum time has elapsed is shown.

  Pattern C shows an example in which a right turn arrow is displayed after the last succeeding vehicle passes until the unit extended green time elapses after the last succeeding vehicle passes because the vehicle has passed even after the minimum time has elapsed. .

  Pattern D shows an example in which the vehicle continues to pass after the minimum time has elapsed, and the subsequent vehicle continues to pass until the maximum time for the right turn arrow is reached, so that the right turn arrow continues to be displayed until the maximum time has elapsed. .

  However, as shown in FIG. 3, the time difference between the passing time of the preceding vehicle and the passing time of the succeeding vehicle immediately after that is the unit extended blue time at the time point after the minimum time elapses before the maximum time in the patterns C and D. If it becomes longer, the right turn arrow is cut off when the unit extended blue time by the preceding vehicle elapses.

  Further, the traffic signal controller 3a receives traffic information and right turn sensitive intersection information from the central device 4, and transmits these information to a plurality of road devices connected to the traffic signal controller 3a.

  The central device 4 stores a right turn sensitive intersection table indicating whether right turn sensitive control is permitted or not at each intersection and a right turn arrow display time table indicating a right turn arrow display time for each link flowing into each intersection in the storage unit of the device. is doing. Here, the link refers to a road between intersections distinguished in the upward direction and the downward direction.

  FIG. 4 is an explanatory diagram showing an example of a right turn sensitive intersection table. The right turn sensitive intersection table includes an intersection ID for identifying the intersection, a right turn sensitive permission / non-permission flag for distinguishing whether right turn sensitive control is currently permitted at the intersection, and right turn sensitive control at the intersection. It consists of each column of permission start time and permission end time. For example, at an intersection with an intersection ID of 000001, right turn sensitive control is permitted at this time, the right turn sensitive control permission start time is 06:00, and the permission end time is 20:00. . Further, for example, at the intersection with the intersection ID 000050, the right turn sensitive control is not permitted at this time, the permission start time of the right turn sensitive control is 16:00, and the permission end time is 18:00. Show.

  FIG. 5 is an explanatory diagram showing an example of a right turn arrow display time table. The right turn arrow display time table includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, a display time maximum indicating a maximum display time of the right turn arrow, and a unit extended blue time column. It is composed of For example, the link that flows into the intersection with the intersection ID 000001 and the link ID is 0000001 indicates that the maximum display time of the right turn arrow is 20 seconds and the unit extended blue time is 3 seconds. . Also, for example, in a link flowing into an intersection with an intersection ID of 000002 and a link ID of 0000010, the maximum display time of the right turn arrow is 15 seconds and the unit extended blue time is 3 seconds. ing. Note that the correspondence relationship 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 creates right turn sensitive intersection information described below at a predetermined timing (for example, every second) based on the right turn sensitive intersection table and the right turn arrow display time table stored in the storage unit.

  FIG. 7 is an explanatory diagram showing an example of right-turn sensitive intersection information. The right turn sensitive intersection information includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, and a right turn for distinguishing whether right turn sensitive control is currently permitted at the intersection. Each column includes a sensitivity permission / non-permission flag, permission start time and permission end time of right turn sensitive control at the intersection, maximum display time indicating the maximum display time of the right turn arrow, and unit extended blue time.

  For example, in a link with a link ID of 0000001, right turn sensitive control is currently permitted at an intersection with a previous intersection ID of 000001; the right turn sensitive control permission start time is 06:00 and the permission end time is 20:00, the maximum display time of the right turn arrow is 20 seconds, and the unit extended blue time is 3 seconds.

  In the link with the link ID 0000253, the right turn sensitive control is not permitted at the current intersection at the intersection with the previous intersection ID 000050, and the right turn sensitive control permission start time is 16:00 and the permission end time. Is 18:00, the maximum display time of the right turn arrow is 10 seconds, and the unit extended blue time is 3 seconds.

  The central device 4 transmits the created right turn sensitive intersection information to a plurality of traffic signals together with traffic information including traffic regulation information such as speed regulation and lane regulation.

  A vehicle-mounted device 2 is mounted on the vehicle 10, and the vehicle-mounted device 2 wirelessly communicates various information with the roadside 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 performs wireless communication with the road device 1 to acquire traffic information and right turn sensitive intersection information. When the in-vehicle device 2 acquires the right turn sensitive intersection information, the in-vehicle device 2 creates notification information described later and provides the information to the driver.

  FIG. 8 is a block diagram showing the configuration 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 direction sensor 202 includes an optical fiber gyro and the like, and measures the direction and angular velocity of the vehicle 10. 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 traffic information and right-turn sensitive intersection information from the road device 1.

  The storage unit 205 stores road map data. The road map data includes the intersection data, the link ID, the link start point, the end point, and the interpolation point (corresponding to the point where the road is bent), the link cost, the link cost, It consists of link data that associates the link ID of the link connected to the start point with the link ID of the link connected to the end point of the link.

  For example, there are as many link costs as there are combinations of the link and the next connection link. After entering the start point of the link, exiting the end point of the link, and entering the start point of the next link to be connected The time required for is set. In this case, the link cost includes the cost required to travel from the start point of the link to the end point, and the cost required to travel from the end point of the link to the start point of the next link, that is, required to pass through the intersection. Cost is included. The cost required to pass through the intersection is the cost required to go straight through the intersection (hereinafter referred to as the straight travel cost), the cost required to turn left at the intersection (hereinafter referred to as the left turn cost), and the cost required to turn right at the intersection. (Hereinafter referred to as the right turn cost), and the connection relationship with the next link to be connected is determined depending on whether the straight turn, left turn, or right turn is applicable. As the straight traveling cost, the left turn cost, and the right turn cost, for example, 3 seconds, 10 seconds, and 45 seconds are set, respectively. The reason why the left turn cost is higher than the straight driving cost is because it takes into consideration the time for waiting for pedestrians to cross the pedestrian crossing. Also, the cost of turning right is greater than the cost of going straight and turning left, the time waiting for the oncoming vehicle to go straight ahead at the intersection, the time when waiting for a red light without turning right at the intersection during the green light, etc. This is because of this.

  The display unit 206 displays the image data created by the processing unit 209 in the notification information creation process described later on the monitor 102. The audio output unit 207 outputs the audio data created by the processing unit 209 in the notification information creation process described later from the speaker 103.

  The inter-vehicle acquisition unit 208 acquires the inter-vehicle distance with the preceding vehicle measured by the distance measuring device 104. The distance measuring device 104 measures the distance to the target using, for example, millimeter waves.

  The processing unit 209 is configured by one or a plurality of microcomputers, and is based on the data 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. Further, the processing unit 209 performs notification information creation / provision processing described later.

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

-1. Intersection display process
When the in-vehicle device 2 acquires the right turn sensitive intersection information from the road device 1, the in-vehicle device 2 refers to the intersection ID and the right turn sensitive permission / non-permission flag of the information, and the intersection data of the road map data stored in the storage unit 205. With reference to the intersection ID and the position of the intersection, image data is created by superimposing the location of the intersection where right-turn sensitive control is currently permitted on the road map, and displayed on the monitor 102.

  FIG. 9 is an explanatory diagram illustrating 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 intersection I where right-turn sensitive control is currently permitted.

  The rider of the vehicle 10 including the driver can recognize at a glance at which intersection I the right turn sensitive control is permitted by looking at the image displayed on the monitor 102. When making a right turn at the permitted intersection I, the driver can make a right turn with a margin. Therefore, the potential danger associated with a right turn at an intersection can be reduced.

-2. Right turn sensitive control notification process-
When the in-vehicle device 2 acquires the right turn sensitive intersection information from the road device 1, the in-vehicle device 2 refers to the link ID of the link on which the vehicle 10 obtained by the map matching process is running, the right turn sensitive intersection information link ID, and the right turn sensitive permission. Referring to the non-permission flag, it is determined whether or not right turn sensitive control is permitted at the intersection at the inflow destination of the link on which the vehicle 10 is traveling. If this determination is affirmative, voice data indicating that right turn sensitive control is permitted is created and output from the speaker 103. The voice data is, for example, “right turn sensitive control is permitted at the intersection ahead”.

  Since the passenger of the vehicle 10 can recognize that there is a possibility that right turn sensitive control may be performed at the intersection ahead by listening to the audio data output from the speaker 103, when turning right at the intersection, You can turn right with plenty of time. Therefore, the potential danger associated with a right turn at an intersection can be reduced.

  Further, when the above determination is affirmative, the in-vehicle device 2 refers to the unit extended blue time in the link ID of the right turn sensitive intersection information and multiplies the unit extended blue time by the speed of the vehicle 10. Calculate the maximum inter-vehicle distance. For example, if the unit extended green time is 3 seconds and the speed of the vehicle 10 is 15 m / second, the maximum inter-vehicle distance is 45 m. Next, the in-vehicle device 2 determines whether or not the inter-vehicle distance with the preceding vehicle is larger than the maximum inter-vehicle distance, and if it is determined that the in-vehicle device 2 is large, creates audio data that prompts the inter-vehicle distance with the preceding vehicle to be reduced. And output from the speaker 103. This is repeated until the inter-vehicle distance with the preceding vehicle becomes equal to or less than the maximum inter-vehicle distance. This is because, when the inter-vehicle distance from the preceding vehicle is larger than the maximum inter-vehicle distance, the vehicle 10 is in a state before the unit extended green time elapses after the preceding vehicle is detected by the vehicle detector in the right turn exclusive lane. This is because the vehicle is not detected by the vehicle detector, and as described in FIG. 3, before the vehicle 10 turns right, the right turn arrow is cut off at the time when the unit extended blue time has elapsed, and the vehicle 10 stops at a red signal. . The audio data in this case is, for example, “The distance between the preceding vehicle and the preceding vehicle is too wide, so reduce the distance so as to be an appropriate distance.”

  By listening to the audio data output from the speaker 103, the passenger of the vehicle 10 can travel while maintaining the inter-vehicle distance with the preceding vehicle to be an appropriate distance, that is, the maximum inter-vehicle distance or less. Therefore, when the preceding vehicle can make a right turn during the right turn arrow, the vehicle 10 can also turn right during the right turn arrow, and the vehicle 10 can be prevented from stopping at a red light.

  Note that the in-vehicle device 2 may acquire and output the voice data only when a signal from a turn indicator (winker) is obtained and the signal indicates a right turn. As a result, since voice data is not output when the intersection is not turned to the right, the processing load on the in-vehicle device 2 can be reduced, and the burden on the driver to listen to irrelevant voice data can be eliminated.

  Further, instead of urging the driver to reduce the inter-vehicle distance from the preceding vehicle, the in-vehicle device 2 may control the traveling so that the vehicle 10 reduces the inter-vehicle distance from the preceding vehicle. In this case, the traveling control unit 105 calculates the maximum inter-vehicle distance based on the right turn sensitive intersection information acquired from the communication unit 204 and the speed of the vehicle 10 acquired from the vehicle speed sensor 101, and the preceding vehicle acquired from the distance measuring device 104. The driving unit (engine) 106 and the braking unit (brake) 107 are controlled so that the inter-vehicle distance is less than or equal to the maximum inter-vehicle distance.

  As a result, the vehicle 10 can travel while maintaining the inter-vehicle distance with the preceding vehicle to be equal to or less than the maximum inter-vehicle distance. Therefore, when the preceding vehicle can make a right turn between the right turn arrows, the vehicle 10 continues to the vehicle. 10 can also make a right turn during the right turn arrow, so that the vehicle 10 can avoid waiting for a red light.

-3. Guide route display process-
When the in-vehicle device 2 acquires the right turn sensitive intersection information from the road device 1, for the link flowing into the intersection I where the right turn sensitive control is permitted, the right turn cost included in the link cost is corrected to be small. The guidance route to the destination is searched, and image data in which the guidance route is superimposed on the road map is displayed on the monitor 102. The destination is preset by a driver or the like.

  Specifically, the in-vehicle device 2 refers to the link ID of the right turn sensitive intersection information and the right turn sensitive permission / non-permitted flag, and determines the link ID of the link flowing into the intersection I at which the right turn sensitive control is currently permitted. The right turn cost included in the link cost of the link ID of the link data included in the road map data is extracted and corrected so as to be reduced. When turning right at an intersection I where right-turn sensitive control is currently permitted, right-turn sensitive control may be performed at the intersection I. If right-turn sensitive control is performed, the intersection can be turned to the right during a green light. This is because it is less likely to stop at a red light. For example, the value is corrected to a value obtained by subtracting a predetermined value from the original right turn cost (for example, 45 seconds). In this case, the predetermined value is preferably set to a value proportional to the maximum display time of the right turn arrow at the intersection I in the right turn sensitive intersection information. For example, if the maximum time is 20 seconds, the predetermined value is 20 seconds, and if the maximum time is 10 seconds, the predetermined value is 10 seconds. This is because the longer the maximum time is, the lower the possibility that a right turn cannot be made during the right turn arrow, and the shorter the time required for the right turn. 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. 10 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 intersection I where right-turn sensitive control is currently permitted, and the bold line indicates the guidance route. The right turn cost of the intersection IA and the intersection IC is 45 seconds, for example, whereas the right turn cost of the intersection IB for which right turn sensitive control is permitted is 25 seconds, for example, so a guidance route to turn right at the intersection IB is searched. I understand that.

  As described above, since the in-vehicle device 2 searches for and displays the guidance route using the right turn cost considering right turn sensitive control, the driver can obtain the best guidance route that is more realistic, and is very much for the driver. Useful.

  In the above-described embodiment, the in-vehicle device 2 is configured to acquire right-turn sensitive 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 right turn sensitive intersection information may be stored in the storage unit 205 in advance and acquired from the storage unit 205, or the right turn sensitive intersection information may be acquired from a storage medium such as a CD-ROM in which the right turn sensitive intersection information is recorded. It may be.

  Further, the in-vehicle device 2 is limited to a configuration that creates voice data indicating that right turn sensitive control is permitted when right turn sensitive control is permitted at the intersection I at the inflow destination of the link on which the vehicle 10 is traveling. Alternatively, the image data indicating that the right turn sensitive control is permitted may be created. This image data is desirably displayed on the monitor 102 or projected onto the windshield using a projector (not shown). FIG. 11 is an explanatory diagram illustrating an example of image data. FIG. 11A shows an example of image data displayed on the monitor 102, and FIG. 11B shows an example of image data projected on the windshield.

  Further, the in-vehicle device 2 is not limited to the configuration for correcting the right turn cost of the link flowing into the intersection I where the right turn sensitive control is permitted, but the link of the link flowing into the intersection I where the right turn sensitive control is not permitted. It may be configured to correct the right turn cost so as to increase. Even in this configuration, if the same right turn is made, it is possible to search for a guidance route for making a right turn at the intersection I for which the right turn sensitive control is permitted rather than the intersection I for which the right turn sensitive control is not permitted.

  Further, the in-vehicle device 2 is not limited to the configuration for correcting the right turn cost of the link flowing into the intersection I where the right turn sensitive control is permitted, and further, the straight traveling cost and the left turn cost of the link flowing into the intersection I. Alternatively, the correction may be made so as to decrease. This is because at the intersection where right-turn sensitive control is implemented, if the traffic demand for right-turn vehicles is small, the right-turn arrow display will be cut off as much as necessary, and the right of traffic will be given to the cross-side vehicle quickly. This is because the time required to go straight or turn left at the intersection is also reduced for a straight vehicle or a left turn vehicle. With this configuration, the driver can obtain the best guide route that is more realistic.

  Further, the in-vehicle device 2 corrects the right turn cost of the link flowing into the intersection I where right turn sensitive control is currently permitted to be small, and the total value of the link cost of the guidance route to the destination is minimized. Thus, the search is not limited to the configuration. For example, the time at which the vehicle 10 flows into each intersection I on the guidance route is estimated by integrating the link cost at the current time, and that time is included in the range from the permission start time to the permission end time at the intersection I. If it is included, the right turn cost of the link flowing into the intersection I is corrected to be small so that the total value of the link cost of the guidance route to the destination is minimized. The structure to search may be sufficient.

  According to this configuration, when the time at which the vehicle 10 flows into each intersection I is predicted, and right turn sensitive control is permitted at the intersection I at that time, the right turn cost of the link flowing into the intersection I is reduced. Since it is set to a small value, the driver can obtain the best guide route in accordance with reality, which is very useful for the driver.

  Further, the right turn sensitive intersection information is not limited to the configuration including the maximum display time of the right turn arrow, and may be configured to include the maximum time of the display time of the right turn arrow, for example. The degree of the maximum display time of the right turn arrow is, for example, “small” if the maximum time is 0 second or more and less than 10 seconds, “standard” if it is 10 seconds or more and less than 15 seconds, or 15 seconds or more. For example, “large” may be used. In this case, the right turn cost of the link flowing into the intersection I where the right turn sensitive control is permitted is preferably a value obtained by subtracting a value corresponding to the degree of the maximum display time of the right turn arrow.

  Alternatively, the right turn sensitive intersection information may include a difference between the minimum time and the maximum time of the right turn arrow display time. For example, if the minimum display time of the right turn arrow is 5 seconds and the maximum time is 15 seconds, the difference is 10 seconds. In this case, the right turn cost of the link flowing into the intersection I where the right turn sensitive control is permitted is preferably a value obtained by subtracting a value proportional to the above difference. This is due to the following reason. As the above difference is larger, the display time of the right turn arrow is flexibly changed according to the demand of the right turn vehicle at the intersection I, and therefore the time of useless green light is shortened. Then, even if the driver makes a right turn at the intersection I, even if the driver stops with a red light, the wasteful green signal time on the intersection side is shortened, that is, the wasteful red signal time is shortened. The time for the driver to stop at the intersection I with a red light becomes shorter. Therefore, the larger the difference is, the shorter the time required for the driver to turn right at the intersection I. Further, at the intersection I where the right turn sensitive control is performed, the remaining number of left-turned vehicles is suppressed, so that it is difficult for traffic congestion near the intersection to occur. For this reason, it is more appropriate to set the cost required to pass through the intersection I where the right turn sensitive control is performed relatively smaller than the intersection I where the right turn sensitive control is not performed.

  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 In-vehicle 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 Inter-vehicle acquisition part 209 Processing part 3 Traffic signal apparatus 3a Traffic signal Controller 3b Signal lamp 4 Central device 10 Vehicle 101 Vehicle speed sensor 102 Monitor 103 Speaker 104 Distance measuring device 105 Travel control unit 106 Drive unit 107 Braking units I, IA, IB, IC Intersection R Road

Claims (15)

An information providing system for transmitting information from a road device to an in-vehicle device,
The road device has means for transmitting right turn sensitive intersection information to the in-vehicle device for identifying whether the predetermined target intersection is an intersection for which right turn sensitive control is permitted,
The information providing system according to claim 1, wherein the vehicle-mounted device includes a creating unit that creates notification information to a passenger of a vehicle on which the vehicle-mounted device is mounted based on the right turn sensitive intersection information received from the road device.   2. The information providing system according to claim 1, wherein the right turn sensitive intersection information includes at least one of identification information of the intersection and identification information of a road flowing into the intersection.   The information providing system according to claim 1, wherein the right turn sensitive intersection information includes information about a permitted time zone at an intersection where right turn sensitive control is permitted.   The information providing system according to claim 1, wherein the right turn sensitive intersection information includes information about a display time of a blue arrow light for a right turn vehicle at an intersection where right turn sensitive control is permitted.   The information providing system according to claim 1, wherein the right turn sensitive intersection information includes information on a unit extended blue time of right turn sensitive control at an intersection where right turn sensitive control is permitted.   A road device used in the information providing system according to claim 1.   The road device according to claim 6, wherein the road device is an optical beacon. An in-vehicle device mounted on a vehicle,
Means for acquiring right turn sensitive intersection information for identifying whether the predetermined target intersection is an intersection for which right turn sensitive control is permitted;
An in-vehicle device comprising: creation means for creating notification information to a passenger of the vehicle based on the right turn sensitive intersection information.   9. The in-vehicle apparatus according to claim 8, wherein the notification information is image information in which a location of an intersection where right-turn sensitive control is permitted is drawn superimposed on a road map.   The in-vehicle device according to claim 8, wherein the notification information is audio information indicating whether or not the intersection is an intersection for which right-turn sensitive control is permitted.   The in-vehicle device according to claim 8, wherein the right turn sensitive 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 8, wherein the right turn sensitive intersection information includes information on a permitted time zone at an intersection where right turn sensitive control is permitted.   The in-vehicle device according to claim 8, wherein the right turn sensitive intersection information includes information about a display time of a blue arrow light for a right turn vehicle at an intersection where right turn sensitive control is permitted.   The in-vehicle device according to claim 8, wherein the right turn sensitive intersection information includes information on a unit extended blue time of right turn sensitive control at an intersection where right turn sensitive control is permitted.   A vehicle equipped with the in-vehicle device according to claim 8.

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