JP6195293B2 - Electronic device, road traffic information display method, and road traffic information display program - Google Patents

Description

  The present invention relates to an electronic device having a function of displaying road traffic information, and more particularly to display control of road traffic information provided by a safe driving support system.

  A navigation device or an electronic device having such a function obtains real-time traffic jam information such as roads and intersections, traffic regulation information, etc. from the outside, and searches for a route to the destination with reference to such information, or It is possible to re-search the guidance route so as to avoid traffic jams.

  On the other hand, a so-called safe driving support system (DSSS: Driving Safety Support Systems) is now being tested on a trial basis and will be fully operated in the future. DSSS transmits road traffic information including warning type information on risk factors to passing vehicles from light beacons installed on the road, and a navigation device (VICS compatible) having a reception function warns. When the type information is received, a warning screen corresponding to the warning type is generated and displayed together with a warning sound. As a result, the driver can detect in advance, for example, whether there is a temporary stop, a traffic light, or the danger of a collision at the end of a traffic jam, with respect to the target point on the other side of the road on which it is traveling. Can be prevented.

  Patent Document 1 describes driving assistance by DSSS when the host vehicle moves on a non-linearly deviated traveling path, when a steering angle sensor detects steering more than a predetermined angle, or when a turn signal operation is detected. A driving support system is disclosed that determines that it is not necessary to complete driving support and ends driving support. Patent Document 2 discloses a system that terminates a service by DSSS when the direction of the DSSS service target road and the direction of the own vehicle are separated by a predetermined distance or more.

JP 2011-118622 A JP 2012-88262 A

  FIG. 8 is a diagram illustrating a display example of warning information in the navigation device using DSSS. When the vehicle 500 passes the beacon installation point B at time t1, the navigation apparatus receives road traffic information including warning type information for avoiding an accident or the like that may occur at the other end. In addition to the warning type information, the road traffic information includes position information and distance information regarding the target point T. The navigation device determines the warning timing according to the travel distance (or the distance of the journey) from the beacon installation point B, and generates and displays a warning screen according to the warning type information at time t2 before the target point T. . For example, a warning screen 510 indicating that the traffic light at the front intersection is red is displayed on the display.

  However, when the vehicle 500 changes its course to another road 520 after passing the beacon installation point B and receiving the warning type information, the navigation device is not included in the road toward the target point T. The warning screen 510 is erroneously displayed at time t2 according to the travel distance. As a result, since incorrect information is presented to the user, there is a risk that the user may be confused and the safe driving may be impaired.

  The present invention solves such a conventional problem, and provides an electronic device, a road traffic information display method, and a road traffic information display program capable of preventing erroneous display of road traffic information when deviating from a road. The purpose is to provide.

  An electronic device according to the present invention includes an acquisition means for acquiring road traffic information from the outside, including at least position information of a target point and distance information to the target point, a specifying means for specifying a vehicle position, and the distance information Based on the presenting means for presenting road traffic information, calculating means for calculating a straight line distance from the position information of the target point to the vehicle position, and based on the straight line distance A determination unit configured to determine whether or not the vehicle has deviated; and a control unit configured to control the presenting unit so that the road traffic information is not presented when it is determined that the vehicle has deviated from the road toward the target point.

  Preferably, the determination means compares the first linear distance calculated at the first time by the calculation means with the second linear distance calculated at the second time after the first time. When the second straight line distance increases, it can be determined that the vehicle has deviated from the road toward the target point. Moreover, the said determination means can determine with having deviated from the road which goes to a target point, when the difference of the said straight line distance and the remaining distance of the estimated journey to the said target point exceeds a fixed value.

  Preferably, the electronic device further includes a travel distance calculation unit that calculates a travel distance from a vehicle speed pulse, and the remaining distance of the predicted journey is a difference between the distance to the target point acquired by the acquisition unit and the travel distance. It is. The electronic device further includes a traveling speed calculating unit that calculates a traveling speed, and the control unit determines whether the driving is dangerous based on the remaining distance of the expected journey to the target point and the traveling speed. When it is determined that the vehicle is driving, the presenting means can be controlled to present the road traffic information.

  Preferably, the determination unit can determine that there is a deviation when a plurality of the same determination results are continuously continued. The road traffic information includes warning information or warning information by DSSS.

  The road traffic information display method according to the present invention includes a step of acquiring road traffic information from the outside, including at least position information of a target point and distance information to the target point, a step of specifying a vehicle position, and the distance A step of presenting road traffic information based on the information, a step of calculating a straight line distance from the position information of the target point to the vehicle position, and whether the vehicle deviates from the road toward the target point based on the straight line distance And determining whether or not the road traffic information is not presented when it is determined that the vehicle has deviated from the road heading to the target point.

  The road traffic information display program according to the present invention obtains road traffic information based on the step of acquiring road traffic information from the outside, including at least position information of the target point and distance information to the target point. A step of determining the position of the host vehicle, a step of calculating a straight line distance from the position information of the target point to the host vehicle position, and whether the vehicle deviates from the road toward the target point based on the straight line distance And a step of controlling the road traffic information not to be presented when it is determined that the vehicle has deviated from the road toward the target point, and is executed by the electronic device.

  ADVANTAGE OF THE INVENTION According to this invention, the road traffic information acquired from the outside can be shown in front of a target point, and when it deviates from a road, the erroneous display of road traffic information can be prevented.

It is a block diagram which shows the structure of the navigation apparatus which concerns on the Example of this invention. It is a block diagram which shows the functional structure of the warning information display program which concerns on the Example of this invention. It is a figure which shows an example of the road traffic information by the Example of this invention. It is a flowchart explaining operation | movement of the navigation apparatus based on the Example of this invention. It is a figure explaining the 1st determination method by the road departure determination means based on the Example of this invention. It is a figure explaining the 2nd determination method by the road departure determination means based on the Example of this invention. It is a flowchart explaining the display operation | movement of the road traffic information which concerns on the case of traffic signal oversight prevention. It is a figure explaining the example of a display of the warning screen in the navigation apparatus using DSSS.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. The electronic device of the present invention may be any one that is fixedly mounted on a moving body such as a vehicle, one that can be brought into the moving body by a user, or one that can be detached from the moving body. In a preferred aspect, the electronic device of the present invention has a navigation function, a function of receiving road traffic information from the outside, and a function of acquiring travel information of the own vehicle via a communication bus in the vehicle or a bus equivalent thereto. Other functions such as a function for reproducing audio / video data, a function for receiving television / radio broadcasts, a function for executing application software, and the like may be integrated. Furthermore, the electronic device of the present invention may itself store road map data for executing a navigation function in a storage device, or may be necessary from a distribution site or a distribution server via a data communication means. Road map data may be acquired. In the following description, a navigation device mounted on a vehicle is illustrated as an example of an electronic device.

  FIG. 1 is a block diagram showing a configuration of a navigation device according to an embodiment of the present invention. The navigation device 100 includes a position information acquisition unit 102 that acquires own vehicle position information, a traffic information acquisition unit 104 that acquires road traffic information such as road conditions, traffic regulations, and warnings, a user input unit 106 that receives input from a user, A data communication unit 108 that enables wired or wireless data communication with the outside, a display unit 110 that displays a warning screen related to a road map or road traffic information on a display, a voice output unit 112 that outputs sound and warning sound, A storage unit 114 that stores road map data and various programs, an external interface (I / F) 116 that enables connection with an in-vehicle communication bus and external devices, and a control unit 118 that controls each unit are configured. The configuration shown here is an example, and the navigation device is not necessarily limited to such a configuration.

  The position information acquisition unit 102 is, for example, a position received from a GPS receiver, a gyro sensor, an acceleration sensor, or the like that detects the absolute position of the host vehicle using a signal transmitted from a GPS satellite 136 (see FIG. 2B). Information is acquired and provided to the control unit 118. Further, as shown in FIG. 2B, the position information acquisition unit 102 can access the position information distribution site (or distribution server) 130 via the network 120 and acquire the vehicle position information therefrom. . In this case, connection to the network 120 is performed via the data communication unit 108.

  The traffic information acquisition unit 104 acquires, for example, road traffic information superimposed on FM radio broadcasts or other broadcast waves, or receives road traffic information by radio communication from an antenna installed on a roadside such as a main road or an expressway. Can be acquired. Further, as shown in FIG. 2B, the traffic information acquisition unit 104 can access a road traffic information distribution site (or distribution server) 134 via the network 120 and acquire road traffic information therefrom. . In this case, connection to the network 120 is performed via the data communication unit 108.

  In addition, when using the safe driving support system (DSSS), the traffic information acquisition unit 104 can acquire road traffic information by wireless communication such as optical communication from a beacon installed on the road. The road traffic information by DSSS includes warning type information regarding risk factors ahead of the road, position information of a warning target point, and distance information to the warning target point. The warning type information includes “signal oversight”, “temporary stop regulation”, “encounter collision”, “rear collision at the end of traffic jam”, and the like. The road traffic information acquired from the DSSS is provided to the control unit 118, and the control unit 118 is provided to the user to prevent an accident from occurring, as will be described later.

  The user input unit 106 provides an interface between the user and the navigation device 100. The user input unit 106 can include an input key device, a touch panel, a voice recognition device, and the like. The data communication unit 108 enables wired or wireless data communication using WiFi, LAN, infrared communication, a telephone line, or the like. The data communication unit 108 may have a built-in function in the navigation device, or may use a communication function by externally connecting a mobile phone or a smartphone. As described above, the data communication unit 108 can be connected to various data distribution sites via the network 120 as shown in FIG.

  The display unit 110 displays a road map for guiding a guidance route to a destination, a warning screen according to warning type information acquired from the DSSS, a menu screen for various settings of the navigation device, and the like. Includes a touch panel compatible display. The audio output unit 22 includes a speaker or the like for outputting guidance route guidance and various warnings.

  The storage unit 114 stores road map data necessary for the operation of the navigation device 100. In one example, the storage unit 114 includes a large-capacity storage device, and a database such as road map data and facility data can be stored therein. In another example, the storage unit 114 can access the road map data distribution site 132 via the network 120 as shown in FIG. 2B, and acquire necessary road map data and the like therefrom. In this case, connection to the network 120 is performed via the data communication unit 108. In the present embodiment, the storage unit 114 further stores a road traffic information display program provided by the DSSS.

  The external interface 116 is connected to an in-vehicle communication bus or the like in addition to connection to an external device, and is connected to various sensors such as an acceleration sensor and a gyro sensor mounted on the vehicle. Thereby, the control part 118 can detect vehicle information, such as travel speed, a travel distance, and a travel direction, based on the output of various sensors.

  In a preferred embodiment, the control unit 118 includes a microcontroller including a ROM, a RAM, and the like, and the ROM or the RAM can store various programs for controlling the operation of each unit of the navigation device. Furthermore, the present embodiment includes a road traffic information display program for controlling the display of road traffic information provided from DSSS.

  The DSSS transmits road traffic information including warning type information related to a risk factor to a passing vehicle from a light beacon installed on a road as described above by a radio signal. The road traffic information display program Is executed when the traffic information acquisition unit 104 acquires road traffic information by DSSS. The road traffic information display program of the present embodiment includes a function of stopping the display of road traffic information when it is determined that the route has been changed to another road or the like after passing through the beacon.

  The functional configuration of the road traffic information display program according to this embodiment is shown in FIG. As shown in FIG. 2, the road traffic information display program 200 warns according to the road traffic information acquisition means 202 that acquires the road traffic information provided by the DSSS and the distance to the target point that is the target of the road traffic information. Warning means 204 for displaying a screen, own vehicle position calculating means 206 for calculating the current own vehicle position, distance calculating means 208 for calculating a straight distance between the target point and the own vehicle position, and a calculated straight line Based on the distance, the road departure determination means 210 for determining whether or not the vehicle deviates from the road heading to the target point, and the warning screen is not displayed when it is determined that the vehicle deviates from the road heading to the target point. Thus, a warning control unit 212 for controlling the warning unit 204 is provided.

  The road traffic information acquisition unit 202 acquires the road traffic information transmitted from the beacon installed on the road by the DSSS via the traffic information acquisition unit 104. FIG. 3 is a diagram illustrating an example of road traffic information provided by DSSS. As shown in FIG. 3A, the road traffic information 250 is displayed at least in front of the target point T, position information 252 of the target point T, distance information 254 from the beacon installation point B to the target point T, and so on. This includes warning type information 256 to be executed. In addition to these pieces of information, the road traffic information 250 may include information regarding a display point where a warning screen is displayed.

Specifically, as shown in FIG. 3B, the position information 252 includes coordinate data “(X _T , Y _T )” of the target point T that is a frequent accident point, for example, and the distance information 254 includes Includes, for example, “500 m” as the distance data from the beacon installation point B to the target point T. The warning type information 256 includes a temporary stop existing ahead, lighting information of a traffic signal ahead, traffic jam information existing ahead, a vehicle approach from the front lateral direction, and the like. In addition, when the information regarding a display point is included, distance data from the installation point B of a beacon etc. are included in display point information, for example.

  When the warning means 204 receives the road traffic information 250, the warning means 204 calculates a display point (display timing) from the distance traveled by the vehicle based on the distance information 252, and alert type information when the vehicle reaches the display point. A warning screen and a warning sound corresponding to 256 can be generated and output. The distance traveled by the vehicle from the beacon installation point B can be obtained from a vehicle speed sensor mounted on the vehicle. For example, the number n of vehicle speed pulses from the time when road traffic information is received is counted, and is calculated from the distance per n × 1 pulse.

  The display point of the warning type information 256 is set in advance as a distance from the target point T, but this distance can also be changed by the user. It is assumed that the display point is set “100 m” before the target point T. Here, for example, when the distance information 254 is “500 m”, the warning unit 204 displays a warning screen at “100 m” before the target point T, that is, “400 m” from the beacon installation point B. be able to. As a result, the warning information is presented to the user before arriving at the target point T where the danger occurs.

  The own vehicle position calculation means 206 is the relative position of the own vehicle according to the absolute position information of the own vehicle by the GPS satellite acquired through the position information acquisition unit 102 and / or the output of various sensors mounted on the vehicle. The vehicle position is calculated using the information.

The distance calculation means 208 calculates a linear distance between the target point and the vehicle position using coordinate data of the target point and the vehicle position in order to determine the deviation of the road traffic information from the target road. The distance calculation means 208 extracts the position information 252 of the target point T from the road traffic information 250, and the position information (X _T , Y _T ) and the own vehicle position calculated by the own vehicle position calculation means 206 ( The linear distance is calculated from the difference from X, Y). The straight line distance calculation process by the distance calculation unit 208 is repeatedly performed at regular time intervals from the time when the road traffic information is received until the time when the warning screen is displayed, for example. Further, when the display control is performed so that the warning screen is not displayed, the distance calculation unit 208 stops the straight line distance calculation process.

  The road departure determination unit 210 determines whether or not the vehicle has deviated from the road based on the linear distance between the target point T calculated by the distance calculation unit 208 and the vehicle position. In a preferred embodiment, each straight line distance calculated at regular time intervals is monitored, and when the straight line distance increases, it is determined that there is a road departure.

  The warning control unit 212 controls the warning unit 204 so that the warning screen is not displayed when the road departure determining unit 210 determines that the vehicle has deviated from the road toward the target point. Thereby, presentation of an erroneous warning screen to the user can be avoided.

  Next, the road traffic information display operation of the navigation device according to this embodiment will be described with reference to the flowchart of FIG. Here, a step of presenting road traffic information received from a beacon on the display of the navigation device 100 in DSSS is shown.

As shown in FIG. 3B, when the own vehicle passes the beacon installation point B, road traffic information as shown in FIG. 3A is acquired by the road traffic information acquisition unit 202 (S101).

  When the road traffic information 250 is acquired, the own vehicle position calculation means 206 calculates the current position of the traveling vehicle (S102). The calculation of the vehicle position is performed at regular time intervals, and the calculation result is provided to the distance calculation means 208. The distance calculation unit 208 calculates a straight line distance between the calculated vehicle position and the received target point T (S103), and provides the calculation result to the road departure determination unit 210. The straight line distance calculation process is continued until, for example, a warning screen is displayed.

  Next, the road departure determination unit 210 determines whether or not the vehicle has deviated from the DSSS target road based on the linear distance between the target point and the vehicle position (S104). FIG. 5 is a diagram for explaining a first determination method by the road departure determination means 210. When the host vehicle travels on the DSSS target road 300, the host vehicle approaches the target point T, and therefore, the linear distance L between the target point T and the host vehicle S changes so as to gradually decrease. On the other hand, when the vehicle travels on the road 310 that is parallel to the road 300 toward the target point T, the linear distance L between the target point T and the own vehicle S increases.

  The road departure determination unit 210 monitors the straight line distance L calculated by the distance calculation unit 208, compares the straight line distance L2 calculated this time with the straight line distance L1 calculated immediately before, and the difference between the straight line distances is calculated. If the positive value, that is, the straight line distance L2 has increased, it is determined that the vehicle has deviated from the road 300 toward the target point T. In this determination, a calculation error may be taken into consideration, and it may be determined that there has been a road departure when the straight line distance increases continuously n times. In yet another determination, when the difference D (D = L1−L1) between the current straight line distance L2 and the previous straight line distance L1 exceeds the threshold Th (D> Th), the target road 300 heading for the target point T is obtained. It may be determined that there is a deviation from By such determination, it is possible to easily determine a deviation from the road 310 parallel to the target road 300.

  Next, a second determination method by the road departure determination means 210 is shown in FIG. In the second determination method, whether or not the vehicle deviates from the road toward the target point by comparing the remaining distance N of the expected journey to the target point T and the straight line distance L between the target point T and the vehicle S Determine. The remaining distance N of the expected journey is estimated from the difference between the distance information 254 received by the road traffic information 250 and the travel distance M from the beacon installation point B, for example. As described above, the travel distance M is calculated from the vehicle speed pulse number n from the time when the beacon passes, and is calculated at a constant time interval. Therefore, the comparison of the expected distance remaining distance N and the linear distance L is constant. Performed at time intervals.

  When the host vehicle travels on the target road 300 of the DSSS, the distance to the target point T approaches, so that the remaining distance N of the expected road and the straight line distance L decrease together. On the other hand, when the own vehicle deviates from the target road 300 toward the target point, a certain difference or more is generated between the remaining distance N and the straight line distance L, and the difference between the two gradually increases. Therefore, the road departure determination unit 210 compares the estimated remaining distance N with the straight line distance L, and determines that the road has departed from the road toward the target point when the difference exceeds a certain value. In this determination, as in the case of the first determination, it may be determined that the deviation has occurred when the difference exceeds a certain value continuously n times.

  When the road departure determination unit 210 does not determine that the own vehicle has deviated from the road according to the first or second determination method, the warning unit 204 normally arrives in front of the target point (S105). ), A warning screen is displayed (S106). On the other hand, when the road departure determination unit 210 determines that the vehicle has deviated from the road, the warning control unit 212 controls the warning unit 204 so as not to display the warning screen, and the warning information is not presented. (S107). Thereby, when the course is changed to another parallel road after passing through the beacon, it is possible to prevent the navigation device 100 from erroneously displaying the warning screen.

  Thus, in the above embodiment, in the navigation device using DSSS, when the vehicle changes its traveling direction to another road after passing through the beacon installation point, the warning is given when the vehicle deviates from the road toward the target point. It can be controlled not to display the screen. Thereby, the user can drive the vehicle safely without the attention being scattered due to erroneous display of the warning screen. Further, in the above embodiment, since it is possible to determine whether or not the vehicle has deviated from the road without using the road map data, the deviation of the vehicle with a certain degree of accuracy can be achieved without depending on the accuracy of the road map data. Presence / absence can be determined.

  Moreover, in the said Example, although the deviation of a road was determined using one of the 1st determination method or the 2nd determination method, the conditions of both the 1st and 2nd determination methods were satisfied not only in this. Sometimes, a road departure may be determined, or a road departure may be determined by combining the first and / or second determination methods with other determination methods.

  In the above embodiment, the display operation of road traffic information due to road departure has been described with reference to FIG. 4, but the warning screen may not be displayed based not only on road departure determination but also on other presentation determination conditions. is there. For example, a display operation according to the case of preventing the signal (or temporary stop) from being overlooked will be described with reference to the flowchart of FIG.

  After the road departure determining unit 210 determines that the vehicle has not deviated from the target road (S201), the display state of the traffic light is determined (S202). For example, in the case of warning type information regarding an oversight of a traffic light, the road traffic information includes information regarding a signal display state, and the road traffic information acquisition unit 202 can acquire the signal display state. Moreover, the warning control means 212 can estimate the signal display when the own vehicle reaches the point of the traffic light based on the acquired signal display. When the signal display is blue, the warning control unit 212 The warning unit 204 is controlled to hide the warning screen (S206).

  When the signal display is red (yellow), it is determined whether or not a deceleration operation has been performed by the user based on the vehicle information detected by the control unit 118 (S203). The deceleration operation is not limited to the brake operation, and may be detected from the vehicle speed of the own vehicle. When the deceleration operation is performed, the warning screen is not displayed (S206) because there is a high possibility that the user has sufficiently grasped the road condition.

  Next, the warning control means 212 determines the risk regarding oversight of the traffic light based on the remaining distance of the expected journey to the target point and the traveling speed of the own vehicle (S204). If it is determined that the risk is low, the warning screen is not displayed (S206). On the other hand, when it is determined that the risk is high, the warning unit 204 generates and displays a warning screen corresponding to the warning type information (S205). That is, a warning screen indicating that the traffic light at the front intersection is red is generated and displayed on the display unit. For risk determination, for example, a predetermined determination list or the like can be used based on the relationship between the remaining distance and the traveling speed.

  As described above, the display control of the warning screen is appropriately performed by appropriately combining the presentation determination conditions other than the road departure determination according to the warning type information. The presentation determination conditions are for determining the necessity of warning information, and other presentation determination conditions can be added as appropriate, and the determination order can be changed as appropriate.

  In the above embodiment, when the road traffic information is provided, the warning screen corresponding to the warning type information included in the road traffic information is presented to the user. In addition to the warning screen, the road status such as the alert information is notified. A screen that guides the traveling direction such as a screen or road guidance information may be presented.

  Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to specific embodiments, and various modifications and changes can be made within the scope of the gist of the invention described in the claims. Is possible.

DESCRIPTION OF SYMBOLS 100: Navigation apparatus 102: Location information acquisition part 104: Traffic information acquisition part 106: User input part 108: Data communication part 110: Display part 112: Audio | voice output part 114: Storage part 116: External interface 118: Control part 120: Network 130 to 134: distribution site 136: satellite 200: road traffic information display program 202: road traffic information acquisition means 204: warning means 206: own vehicle position calculation means 208: distance calculation means 210: road deviation determination means 212: warning control means 250: Road traffic information 252: Position information 254: Distance information 256: Warning type information 258: Warning display 300: Target road T: Target point B: Beacon installation point L: Straight distance between target point and own vehicle S: Self Car M: Distance traveled from installation point B N: Estimated to target point T Remaining distance

Claims (8)

An acquisition means for acquiring road traffic information from the outside, including at least position information of the target point, distance information to the target point, and type information ;
A specifying means for specifying the vehicle position;
Presenting means for generating and presenting a road traffic information screen according to the type information based on the distance information;
A calculating means for calculating a linear distance from the position information of the target point to the vehicle position;
A determination means for determining whether or not the vehicle deviates from the road toward the target point based on the straight distance;
When it is determined that deviate from the road toward the target point, have a, and a control means for the road traffic information screen for controlling the presenting means so as not to be presented,
The determination means compares the first linear distance calculated at the first time by the calculating means with the second linear distance calculated at the second time after the first time, An electronic device that determines that the vehicle has deviated from the road toward the target point when the straight line distance increases beyond a certain threshold . 2. The electronic device according to claim 1 , wherein the determination unit determines that the vehicle has deviated from the road toward the target point when a difference between the straight line distance and a remaining distance of the expected journey to the target point exceeds a certain value. apparatus. A mileage calculating means for calculating the mileage from the vehicle speed pulse;
The electronic device according to claim 2 , wherein the remaining distance of the expected journey is a difference between the distance to the target point acquired by the acquisition unit and the travel distance. A travel speed calculating means for calculating the travel speed;
The control means determines whether it is dangerous driving based on the remaining distance of the expected journey to the target point and the traveling speed, and when determining that it is dangerous driving, the control means presents the road traffic information screen. The electronic device according to claim 2 , wherein the electronic device is controlled. The electronic device according to any one of claims 1 to 4 , wherein the determination unit determines that there is a deviation when a plurality of the same determination results are continuously continued. The road traffic information includes warning type information or alert information by DSSS, electronic device according to 5 any one claims 1. A road traffic information display method in an electronic device having data communication means, position information acquisition means, display means and control means,
The control means includes
Obtaining road traffic information from the outside, including at least position information of the target point, distance information to the target point, and type information by the data communication means ;
Identifying the vehicle position by the position information acquisition means ;
Based on the distance information, generating a road traffic information screen according to the type information and presenting it on the display means ;
Calculating a linear distance from the position information of the target point to the vehicle position;
Determining whether or not the vehicle deviates from the road toward the target point based on the straight distance; and
When it is determined that deviate from the road toward the target point, have a, a step of the road traffic information screen is controlled so as not to be presented on the display means,
The determining step compares the first linear distance calculated at the first time by the calculating step with the second linear distance calculated at the second time after the first time; A road traffic information display method for determining that the vehicle has deviated from the road heading to the target point when the second straight line distance exceeds a certain threshold . A road traffic information display program executed by an electronic device having data communication means, position information acquisition means, display means and control means ,
The control means includes
Obtaining road traffic information from the outside, including at least position information of the target point, distance information to the target point, and type information by the data communication means ;
Identifying the vehicle position by the position information acquisition means ;
Based on the distance information, generating a road traffic information screen according to the type information and presenting it on the display means ;
Calculating a linear distance from the position information of the target point to the vehicle position;
Determining whether or not the vehicle deviates from the road toward the target point based on the straight distance; and
When it is determined that deviate from the road toward the target point, have a, a step of the road traffic information screen is controlled so as not to be presented on the display means,
The determining step compares the first linear distance calculated at the first time by the calculating step with the second linear distance calculated at the second time after the first time; A road traffic information display program for determining that the vehicle has deviated from the road toward the target point when the second straight line distance exceeds a certain threshold .

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