JP4665938B2 - Traffic information display device - Google Patents

Description

  The present invention relates to a traffic jam information display device configured to be able to display a traffic jam information (traffic jam line) having a predetermined length representing the degree of traffic jam received from a center device, superimposed on a road link of road map data.

Conventionally, an on-vehicle device configured to receive traffic information (congestion line) of a predetermined length representing the degree of traffic jam from the center device and to display the received traffic jam information superimposed on the road link of the road map data. A navigation device is provided (see, for example, Patent Documents 1 and 2).
JP-A-7-239997 JP 2001-194170 A

  By the way, it is common for a driver to judge whether or not there is a traffic jam on the basis of a specific node (intersection), but conventionally, the traffic information is not displayed on the basis of a specific node. The driver was allowed to consider the difference section from the end of the congestion information to a specific node. However, such a configuration is not desirable because it imposes a burden on the driver to consider the difference section from the end of the congestion information to a specific node during driving.

  In addition, the traffic information is displayed with different display modes (for example, display colors) according to the level of the traffic jam, that is, the traffic information of “traffic jam” indicating that the level of the traffic jam is large, for example, is displayed in red. It is common to display the congestion information for “congested” indicating that the level of traffic is intermediate in orange and the traffic information for “empty road” indicating that the level of traffic is small in yellow. If the individual length of the traffic information received from the center device is short, a plurality of traffic information with different display modes may be displayed together with an extremely short road length, and the driver will be confused on the contrary. There is also a problem.

  The present invention has been made in view of the above-described circumstances, and its purpose is to appropriately display the traffic information received from the center device, and to provide meaningful traffic information to the driver. An object is to provide an information display device.

According to the first aspect of the present invention, when the traffic jam information receiving unit receives the traffic jam information having a predetermined length indicating the level of the traffic jam from the center device, the control unit displays the traffic jam information received by the traffic jam information receiving unit as the road map. The data reading means superimposes it on the road link of the road map data read from the road map data storage means and displays it on the display means. Here, when the end of the traffic jam information received by the traffic jam information receiving unit corresponds to the node , the control unit determines the road types of all the connected road links connected to the node and connects to the node. If the road type of all connected road links is other than a specific road, the next node following the direction of travel of the traffic congestion information from the node corresponding to the end of the traffic congestion information is set as the next determination target. If the road type of any connected road link connected to the next node to be determined is a specific road, the process of determining the road type of all connected road links connected to the node, The terminal side of the traffic jam information is extended to the next node to be judged and displayed on the display means.

As a result, for example, a trunk road (for example, a highway or a general road) is set in advance as a specific road, so that the congestion information is terminated until the next node to be determined that the highway or the general road is connected. The end of the traffic information can be extended and displayed to a well-separated node to which a highway or general road is connected when the driver is driving. it can.

According to the invention described in claim 2 , the control means is a part in which the road type of any of the connected road links connected to the next node to be determined is a specific road and extends the terminal side of the congestion information If the length of the traffic information is within a predetermined distance, the terminal side of the traffic jam information is extended to the next node to be determined and displayed on the display means. As a result, the length of the part that extends the terminal side of the traffic information can be displayed by extending the terminal side of the traffic information to the next target node for the traffic information within a predetermined distance. It is possible to extend and display the end side of the congestion information within a range where it is advantageous for the driver to extend the end side.

According to the invention described in claim 3 , the control means extends the end side of the traffic jam information even if the road type of any of the connected road links connected to the next node to be determined is a specific road. If the length of the part to be performed is not within the predetermined distance, the traffic information is displayed on the display means in the initial state. As a result, the length of the portion extending the end side of the traffic jam information becomes longer than necessary, and it is possible to prevent the driver from being confused by extending the end side of the traffic jam information.

According to the invention described in claim 4 , when the end of the traffic information received by the traffic information receiving unit corresponds to the node, the control unit determines whether or not there is a traffic light at the node, If there is no traffic signal at the node, all the nodes connected to the next determination target node are set as the next determination target from the node corresponding to the end of the traffic congestion information to the next direction of the traffic congestion information. The process of determining the road type of the connected road link is performed. On the other hand, if there is a traffic light at the next determination target node, the end of the congestion information is extended to the next determination target node. Display on the display means. As a result, it is possible to extend and display the end side of the traffic jam information to the next node to be judged where the traffic signal exists, and to terminate the traffic jam information to a node with good separation when the driver is driving The side can be extended and displayed.

According to the fifth aspect of the present invention, if the traffic signal is present in the next determination target node and the length of the portion extending the end side of the traffic jam information is within a predetermined distance, the control means The terminal end of the information is extended to the next node to be determined and displayed on the display means. As a result, in the same manner as described in claim 2 above, the congestion information end side is extended to the node and displayed for the congestion information whose length extending the end side of the congestion information is within a predetermined distance. It is possible to extend and display the end side of the congestion information within a range where it is advantageous for the driver to extend the end side of the congestion information.

According to the invention described in claim 6 , the control means, even if there is a traffic light at the next node to be determined, the length of the part extending the terminal side of the congestion information is not within a predetermined distance. The traffic information is displayed on the display means in the initial state. Thus, in the same manner as described in claim 3 above, the length of the portion that extends the terminal side of the traffic jam information becomes longer than necessary. The confusion can be avoided in advance.

According to the invention described in claim 7 , when the traffic information received by the traffic information receiving unit does not correspond to the node, the control unit superimposes the traffic information on the end side of the traffic information. Is extended to the node and displayed on the display means. As a result, it is possible to extend and display the end of the traffic information to the node of the road link on which the traffic information is superimposed, and to display the end of the traffic information to the node that is well separated when the driver is driving can do.

According to the invention described in claim 8 , if the length of the portion extending the terminal side of the traffic jam information is within a predetermined distance, the control means sets the road link that superimposes the traffic jam information on the terminal side of the traffic jam information. Extend to the node and display on the display means. As a result, in the same manner as described in claim 2 above, the congestion information end side is extended to the node and displayed for the congestion information whose length extending the end side of the congestion information is within a predetermined distance. It is possible to extend and display the end side of the congestion information within a range where it is advantageous for the driver to extend the end side of the congestion information.

According to the ninth aspect of the present invention, the control means causes the display means to display the traffic jam information in the initial state unless the length of the portion extending the terminal side of the traffic jam information is within a predetermined distance. Thus, in the same manner as described in claim 3 above, the length of the portion that extends the terminal side of the traffic jam information becomes longer than necessary, and the driver can be dismissed by extending the terminal side of the traffic jam information. The confusion can be avoided in advance.

  Hereinafter, an embodiment in which the present invention is applied to an in-vehicle navigation device will be described with reference to the drawings. FIG. 1 shows the configuration of the in-vehicle navigation device by a combination of functional blocks, and FIG. 2 shows the configuration of the center device by a combination of functional blocks.

  The in-vehicle navigation device 1 (congestion information display device in the present invention) mounted on the vehicle and the center device 2 installed in the traffic information center are configured to be communicable via a mobile communication network. The in-vehicle navigation device 1 and the center device 2 have an N (unspecified number) one-to-one relationship, and the center device 2 is configured to be able to communicate with an unspecified number of in-vehicle navigation devices 1 via a mobile communication network. .

  The in-vehicle navigation device 1 includes a control unit 3 (control means in the present invention), a position detector 4, a road map data input device 5 (road map data reading means in the present invention), an operation switch group 6, a communication device 7 ( Congestion information receiving means in the present invention, an external memory 8, a display device 9 (display means in the present invention), a voice controller 10, a voice recognition device 11, and a remote control sensor 12.

  The control unit 3 includes a CPU, a RAM, a ROM, and an I / O bus. The control unit 3 includes a known microcomputer, and controls the operation of the entire apparatus by executing a control program. The position detector 4 includes a G sensor 4a, a gyroscope 4b, a distance sensor 4c, and a GPS receiver 4d, and these components have detection errors having different properties. The control unit 3 detects (identifies) the current position by complementing the detection signals input from these components. In this case, the position detector 4 does not have to include all these components as long as the current position can be detected with the required detection accuracy, and the steering sensor for detecting the steering angle of each steering wheel and each wheel. A wheel sensor for detecting rotation may be combined.

  The road map data input device 5 is mounted with a recording medium 13 (road map data storage means in the present invention) made of, for example, a DVD-ROM, and road map data (node information and road type) recorded on the recording medium 13 is loaded. ), Landmark data, map matching data, and the like. Note that the recording medium 13 may be a CD-ROM, a memory card, an HDD, or the like. The operation switch group 6 includes mechanical switches arranged around the display device 9 and touch switches formed on the display device 9, and details of operations performed by crew members including the driver (for example, menu display selection, destination setting). , Route search, route guidance start, display screen change, volume adjustment, etc.) are detected and output to the control unit 3.

  The communication device 7 communicates with the center device 2 via a mobile communication network. The external memory 8 is composed of a large-capacity storage device such as an HDD, and stores large-capacity data and data that should be retained even when the power is turned off. The display device 9 is composed of, for example, a color liquid crystal display, displays various display screens such as a menu display selection screen, and superimposes a current position figure representing a current position, a travel locus, and the like on a road link of road map data. To display. The display device 9 may be composed of an organic EL, a plasma display, or the like.

  The voice controller 10 controls the operation of the voice recognition device 11 and outputs, for example, voice guidance for route guidance from the speaker 14. The voice recognition device 11 recognizes the voice input by the microphone 15 according to a voice recognition algorithm. The remote control sensor 12 outputs an operation signal received from the operation remote controller 16 to the control unit 3.

  For each function, the control unit 3 compares the road map data acquisition unit for acquiring road map data, the current position with the road map data acquired by the road map data acquisition unit, and determines the road link where the current position exists. Map matching unit to be identified, route search unit to search for a route from the current position specified by the map matching unit to the destination set by the occupant, the route searched by the route search unit, and the position of the intersection included in the road map data A route guidance unit that calculates a route necessary for route guidance based on data and the like, and a drawing unit that draws a map around the current position, a schematic diagram of an expressway, an enlarged view near an intersection, and the like are provided.

  In addition, the control unit 3 periodically transmits probe data with the current position, direction, and vehicle speed as one unit from the communication device 7 to the center device 2 via the mobile communication network, and the traffic jam distributed from the center device 2 When the information (traffic congestion line) is received by the communication device 7, the received traffic congestion information is displayed superimposed on the road link of the road map data read from the recording medium 13. In addition, the vehicle on which the vehicle-mounted navigation device 1 configured as described above is mounted may not be a vehicle that has a particularly limited application.

  The center device 2 includes a control unit 17, a probe data receiving unit 18 that receives probe data transmitted from the in-vehicle navigation device 1, a traffic information distribution unit 19 that distributes traffic information, a road map database 20 that stores road map data, It is configured with a traffic information database 21 for storing traffic information. The control unit 17 includes a CPU, a RAM, a ROM, and an I / O bus. The control unit 17 includes a known microcomputer, and controls the operation of the entire apparatus by executing a control program.

  In this case, when the probe data transmitted from the in-vehicle navigation device 1 is received by the probe data receiving unit 18, the control unit 17 extracts the current position and direction from the received probe data and sets the extracted current position and direction to the current position and direction. Corresponding road map data is read from the road map database 20, and the current position is map-matched to the road link of the road map data read from the road map database 20. Further, the control unit 17 extracts the vehicle speed from the probe data, and specifies the traffic jam information according to the extracted vehicle speed with respect to the road link map-matched to the current position.

  Specifically, if the vehicle speed extracted from the probe data is “less than 10 km / h”, the road link is identified as “congested”, and if the vehicle speed is “less than 20 km / h”, the road link is “congested”. If the vehicle speed is “20 km / h or more”, the road link is specified as “empty road”. Then, every time the traffic jam information is identified in this way, the control unit 17 writes the correspondence between the identified traffic jam information and the road link in the traffic jam information database 21 and updates the traffic jam information database 21. The traffic information is distributed from the traffic information distribution unit 19 to the in-vehicle navigation device 1.

  In the in-vehicle navigation device 1, when the communication device 7 receives the traffic information distributed from the center device 2, the control unit 3 reads the road link of the road map data on which the received traffic information is superimposed from the recording medium 13, The received traffic information is superimposed on the road link of the corresponding road map data and displayed on the display device 9. In this case, the control unit 3 displays the traffic jam information received from the center device 2 with different display modes (for example, display colors) according to the level of the traffic jam.

  Specifically, if the traffic jam information received from the center device 2 is “traffic jam” indicating that the degree of the traffic jam is large, the control unit 3 displays the traffic jam information in red and the traffic jam received from the center device 2. If the information is “congested” indicating that the degree of traffic jam is intermediate, the traffic jam information is displayed in orange, and the traffic information received from the center device 2 is “empty road” indicating that the level of traffic jam is small. If so, the traffic information is displayed in yellow. That is, the driver can confirm the size of the degree of traffic jam by confirming the display color of the displayed traffic jam information.

Next, the operation of the above configuration will be described with reference to FIGS. In the in-vehicle navigation device 1, when the traffic information received from the center device 2 is superimposed on the road link of the road map data, the control unit 3 displays the traffic information when a predetermined condition described later is satisfied. The end side of is extended and displayed. here,
(1) Processing to display the extended side of the traffic jam information by determining the road type of the connected road link connected to the node (2) Determine whether the traffic signal exists at the node and terminate the traffic jam information (3) Processing for determining whether the end of traffic jam information corresponds to a node and extending and displaying the end side of traffic jam information will be sequentially described.

(1) Processing to determine the road type of the connected road link connected to the node and display the extended side of the congestion information First, first determine the road type of the connected road link connected to the node and end the congestion information The process of displaying the side extended will be described with reference to FIGS.

  In the in-vehicle navigation device 1, the control unit 3 determines whether or not the traffic information transmitted from the center device 2 has been received by the communication device 7 (step S <b> 1), and the traffic information transmitted from the center device 2 is determined. If it is determined that the communication device 7 has received it ("YES" in step S1), the road map data stored in the recording medium 13 is searched, and the road link of the road map data on which the received traffic jam information is superimposed is searched. It is read from the recording medium 13 and it is determined whether or not the end of the received traffic jam information corresponds to the node (the location information of the traffic jam information matches the location information of the node) (step S2). .

  If the control unit 3 determines that the end of the received traffic jam information corresponds to a node (“YES” in step S2), the control unit 3 acquires node information related to the node (step S3). The road types of all connected road links connected to the node are acquired (step S4). Here, the road type is classified into, for example, a highway, a general road, an attachment road, a narrow street, or a rotary.

  Next, the control unit 3 determines whether or not the road type of any connected road link is a specific road (step S5), and determines that the road type of any connected road link is a specific road. ("YES" in step S5), the traffic information received from the center device 2 is displayed on the display device 9 in the initial state (step S6). That is, the control unit 3 determines that the end of the congestion information received from the center device 2 corresponds to a node, and the road type of any connected road link connected to the node is a specific road (for example, an expressway or a general road) ), The terminal side of the congestion information received from the center device 2 is not extended and is displayed on the display device 9 in the initial state.

  On the other hand, the control unit 3 determines that the road type of any connected road link is not a specific road, that is, the road type of all connected road links is a road other than the specific road (for example, an attached road, a narrow street, a rotary, etc. ) ("NO" in step S5), node information relating to the next node following the direction of travel of the traffic jam information is acquired from the node corresponding to the end of the traffic jam information (step S7). The road types of all connected road links to be connected are acquired (step S8). Next, in this case as well, the control unit 3 determines whether or not the road type of any connected road link is a specific road (step S9), and the road type of any connected road link is not a specific road. That is, when it is determined that the road type of all the connected road links is other than the specific road (“NO” in step S9), the process returns to step S7 described above, and steps S7 to S9 are repeated.

  On the other hand, when the control unit 3 determines that the road type of one of the connection road links is a specific road (“YES” in step S9), the length of the extended portion is within a predetermined distance. Whether or not (step S10). If the control unit 3 determines that the length of the part to be extended is within a predetermined distance (“YES” in step S10), the control unit 3 goes to the node to which the connection road link whose road type is a specific road is connected. If the end of the traffic jam information is extended and displayed on the display device 9 (step S11), on the other hand, if it is determined that the length of the extended portion is not within the predetermined distance (“NO” in step S10), this case also The terminal side of the traffic jam information received from the center device 2 is not extended and displayed on the display device 9 in the initial state (step S6).

  More specifically, as shown in FIG. 4, the road types of the connection road links a1 and a2 connected to the node A, the road types of the connection road links b1 and b2 connected to the node B, and the connection road connected to the node C If the road type of the links c1 and c2 is, for example, a narrow street and the road type of the connected road links d1 and d2 connected to the node D is a general road, the control unit 3 reaches the node D at the end of the congestion information. To the distance between the node A and the node B (L1 in FIG. 4), the distance between the node B and the node C (L2 in FIG. 4), and the distance between the node C and the node D The total distance (the sum of L1, L2, and L3) of the distance (L3 in FIG. 4) is calculated.

  Then, if the calculated total distance is within the predetermined distance, the control unit 3 extends the terminal side of the congestion information received from the center device 2 to the node D as shown in FIG. On the other hand, if the calculated total distance is not within the predetermined distance, as shown in FIG. 5A, the terminal side of the traffic jam information received from the center device 2 is not extended and the initial state is not It is displayed on the display device 9 as it is. In addition, the predetermined distance here is a distance for which it is significant to extend the terminal side of the traffic information (for example, it can be assumed that the traffic information does not change until the vehicle reaches the terminal). It is about 100 meters.

  Thus, for example, the node D to which a highway, a general road, or the like is connected, not the node A, the node B, or the node C to which a road other than the main road such as an attachment road, a narrow street, or a rotary is connected. The end side of the traffic information can be extended and displayed, and the end side of the traffic information can be extended and displayed to the node D that is good for the driver who is connected to the main road such as an expressway or a general road. be able to.

(2) Processing for determining whether or not there is a traffic signal at the node and extending and displaying the terminal side of the traffic jam information Next, it is determined whether or not there is a traffic signal at the node and the traffic jam information terminal side is determined. The extended display process will be described with reference to FIGS.

  In this case, when the control unit 3 determines that the traffic information transmitted from the center device 2 has been received by the communication device 7 (“YES” in step S21), the control unit 3 determines the road map data to be superimposed on the received traffic information. When the road link is read from the recording medium 13 and it is determined that the end of the received traffic jam information corresponds to the node (“YES” in step S22), node information related to the node is acquired (step S23). It is determined whether there is a traffic light at the node (step S24).

  Next, when the control unit 3 determines that there is a traffic signal at the node (“YES” in step S24), the control unit 3 displays the traffic jam information received from the center device 2 on the display device 9 in an initial state (step S25). ). That is, the control unit 3 does not extend the end side of the traffic information received from the center device 2 if the end of the traffic information received from the center device 2 corresponds to the node and there is a traffic light at the node. Instead, it is displayed on the display device 9 in the initial state.

  On the other hand, when determining that there is no traffic signal at the node (“NO” in step S24), the control unit 3 acquires node information regarding the next node (step S26), and the traffic signal is present at the node. It is determined whether or not there is a signal (step S27). If it is determined that there is no traffic signal at the node ("NO" in step S27), the process returns to step S26 described above, and steps S26 and S27 are repeated.

  On the other hand, when determining that there is a traffic light at the node (“YES” in step S27), the control unit 3 also determines whether or not the length of the part to be extended is within a predetermined distance. Is determined (step S28). When the control unit 3 determines that the length of the part to be extended is within a predetermined distance (“YES” in step S28), the control unit 3 extends the end side of the traffic jam information to the node where the traffic signal exists, and displays the display device. 9 (step S29), on the other hand, if it is determined that the length of the portion to be extended is not within the predetermined distance ("NO" in step S28), the end of the congestion information received from the center apparatus 2 is also in this case The side is not extended and displayed on the display device 9 in the initial state (step S25).

  More specifically, as shown in FIG. 7, if there is no traffic light at the nodes E and F and there is a traffic light at the node G, the control unit 3 will wait until the end of the congestion information reaches the node G. The above processing is performed, and the total distance (the sum of L4 and L5) between the distance between the node E and the node F (L4 in FIG. 7) and the distance between the node F and the node G (L5 in FIG. 7). Calculate

  If the calculated total distance is within the predetermined distance, the control unit 3 extends the traffic jam information received from the center device 2 to the node G and displays it on the display device 9 as shown in FIG. On the other hand, if the calculated total distance is not within the predetermined distance, as shown in FIG. 8A, the terminal side of the congestion information received from the center device 2 is not extended and the display device remains in the initial state. 9 is displayed. The predetermined distance here is also a distance that makes it significant to extend the end side of the traffic jam information (for example, it can be assumed that the traffic jam information does not change until the vehicle reaches the end).

  As a result, it is possible to extend and display the terminal side of the traffic jam information to the node G where the traffic signal exists instead of the node E or the node F where the traffic signal does not exist, and to the node G which is good for the driver where the traffic signal exists. The end side of traffic information can be extended and displayed.

(3) Processing to determine whether or not the end of traffic jam information corresponds to a node and to display the end side of the traffic jam information extended Next, determine whether or not the traffic jam information corresponds to a node A process for extending and displaying the end side of the traffic jam information will be described with reference to FIGS.

  When determining that the traffic information transmitted from the center device 2 has been received by the communication device 7 (“YES” in step S31), the control unit 3 searches the road map data stored in the recording medium 13, The road link of the road map data that superimposes the received traffic jam information is read from the recording medium 13, and the end of the received traffic jam information does not correspond to the node. That is, the received traffic jam information indicates the partial traffic jam Is determined ("NO" in step S32), it is determined whether the distance from the end of the traffic jam information to the node of the road link on which the traffic jam information is superimposed is within a predetermined distance (step S33). .

  When determining that the distance from the end of the congestion information to the road link node on which the congestion information is superimposed is within a predetermined distance (“YES” in step S33), the control unit 3 superimposes the congestion information. When the end of the traffic information is extended to the road link node and displayed on the display device 9 (step S34), on the other hand, when it is determined that the distance from the end of the traffic information to the node is not within the predetermined distance (in step S33) In this case as well, the terminal side of the traffic jam information received from the center device 2 is not extended and displayed on the display device 9 in the initial state (step S35).

  More specifically, as shown in FIG. 10, the control unit 3 calculates the distance (L6 in FIG. 10) from the end of the congestion information to the node H, and if the calculated distance is within a predetermined distance, As shown in FIG. 11B, the end of the traffic jam information received from the center device 2 is extended to the node H and displayed on the display device 9. On the other hand, if the calculated distance is not within the predetermined distance, FIG. As shown to (a), it does not extend the termination | terminus side of the traffic congestion information received from the center apparatus 2, but displays it on the display apparatus 9 with an initial state. The predetermined distance here is also a distance that makes it significant to extend the end side of the traffic jam information (for example, it can be assumed that the traffic jam information does not change until the vehicle reaches the end).

  As a result, it is possible to extend and display the end side of the congestion information to the node H of the road link on which the congestion information is superimposed, and to display the extension side of the congestion information to the node H that is good for the driver. Can do.

  By the way, as described above, (1) the process of determining the road type of the connection road link connected to the node and extending the terminal side of the traffic jam information, and (2) whether or not there is a traffic light at the node. Processing to display and extend the end side of traffic information and (3) Processing to determine whether the end of traffic information corresponds to a node and extend and display the end side of traffic information However, the control unit 3 may perform these processes collectively.

  That is, a priority is assigned between the process of determining the road type of the connected road link connected to the node and the process of determining whether or not a traffic signal exists in the node. For example, the former has a higher priority than the latter. If so, it is determined that the road type of any connected road link is a specific road ("YES" in step S9), but it is determined that the length of the part to be extended is not within a predetermined distance. After that ("NO" in step S10), it is possible to perform processing (steps S21 to S29) for determining whether or not there is a traffic light at the node. On the other hand, for example, if the latter gives higher priority than the former, it is determined that there is a traffic signal at the node (“YES” in step S27), but the length of the part to be extended After determining that is not within the predetermined distance (“NO” in step S28), processing for determining the road type of the connected road link connected to the node may be performed.

  As described above, according to the present embodiment, in the in-vehicle navigation device 1, when the relationship between the traffic jam information received from the center device 2 and the road link on which the traffic jam information is superimposed satisfies a predetermined condition, the traffic jam information is terminated. Since the side is extended and displayed, the driver is not forced to take into account the difference section from the end of the traffic jam information to a specific node during driving, and one piece of traffic jam information is displayed to some extent. By displaying the information on the road length, it is possible to appropriately display the traffic information received from the center device 2 without displaying a plurality of traffic information with different display modes in a mixed manner with a very short road length. Traffic information can be provided to the driver.

  In this case, when the end of the congestion information corresponds to the node, for example, the end side of the congestion information is extended to the node to which the main road such as an expressway or a general road is connected or the node where the traffic signal exists. Because it is configured as described above, when the driver is driving, for example, the terminal side of the congestion information is extended and displayed to a well-separated node where a highway such as a highway or a general road is connected or a signal is present Can do.

  In addition, when the end of traffic information does not correspond to a node (when it is traffic information indicating partial traffic), the end side of traffic information is extended to the node of the road link where traffic information is superimposed. Therefore, it is possible to extend and display the terminal side of the traffic jam information to a node with good separation when driving.

  Furthermore, when extending the end side of the traffic jam information, the length of the part extending the end side of the traffic jam information is set within a predetermined distance. By extending the end side of traffic information within the range where it is advantageous to extend the end side of traffic information, and by extending the end side of traffic information whose length exceeds the predetermined distance On the other hand, it can be avoided that the driver gets confused.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The predetermined distance that is a criterion for determining whether or not to extend the terminal side of the traffic jam information may be a value that can be freely set by the driver, or a value that is fixedly set when the vehicle is manufactured or sold. Alternatively, if the control unit has a learning function, it may be a value variably set according to the learning result. It may be configured to omit the condition that the length of the end of the traffic jam information is within a predetermined distance, that is, a highway, a general road, etc. regardless of the length of the end of the traffic jam information A configuration may be adopted in which the terminal side of the traffic jam information is extended and displayed to a node to which the main road is connected or a node having a traffic signal.

The classification of the road type is not limited to the classification of an expressway, a general road, an attachment road, a narrow street, or a roundabout, but may be a classification of, for example, a bridge, a tunnel, or an elevated road.
A configuration may be employed in which the degree of traffic jam (“traffic jam”, “congestion”, or “empty road”) is determined to determine whether to extend the end side of the traffic jam information.
The configuration may be such that the terminal side of the traffic jam information is extended and displayed to a node to which a main road such as an expressway or a general road is connected or a node having a traffic signal.
When searching for a node to which a main road such as an expressway or general road is connected or a node with a traffic signal, the expressway or general It may be configured to stop searching for a node to which a main road such as a road is connected or a node having a traffic signal.

The one which shows one Embodiment of this invention, and is a figure which shows the whole structure of a system Functional block diagram of in-vehicle navigation system flowchart The figure which shows the aspect which extends the end side of traffic jam information Figure showing the display screen 3 equivalent figure 4 equivalent diagram Figure equivalent to FIG. 3 equivalent figure 4 equivalent diagram Figure equivalent to FIG.

Explanation of symbols

  In the drawings, 1 is an in-vehicle navigation device (congestion information display device), 2 is a center device, 3 is a control unit (control means), 5 is a road map data input device (road map data reading means), and 7 is a communication device (congestion). Information receiving means), 9 is a display device (display means), and 13 is a recording medium (road map data storage means).

Claims (16)

Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
The control means, when the end of the traffic information received by the traffic information receiving means corresponds to a node, determines the road type of all the connected road links connected to the node, all connected to the node When the road type of the connected road link is other than a specific road, the next node following the traffic information traveling direction side from the node corresponding to the end of the traffic congestion information is set as the next determination target When the road type of any connected road link connected to the next determination target node is a specific road, the terminal side of the congestion information is processed. Is extended to the next node to be determined and displayed on the display means. In the traffic information display device according to claim 1,
Said control means is within a predetermined distance length of the portion extending the end side of one of the road type is and the congestion information Ri particular road der connection road links connected to the node that the determination target of those said next The traffic jam information display device is characterized in that the traffic jam information terminal side is extended to the next node to be determined and displayed on the display means. In the traffic jam information display device according to claim 1 or 2,
Wherein, one of the connections I also road type specific road der road link, part of the length predetermined distance to extend the terminal end side of the traffic congestion information to connect to the node that was the next determination target When it is not within, the traffic information is displayed on the display means in the initial state . Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
The control means determines whether or not there is a traffic light at the node when the end of the traffic information received by the traffic information receiving means corresponds to the node, and when there is no traffic light at the node Processing for determining the road types of all connected road links connected to the next determination target node from the node corresponding to the end of the traffic congestion information as the next determination target next node following the direction of travel of the traffic congestion information And when the traffic signal is present at the next judgment target node , the traffic information is displayed on the display means by extending the terminal side of the traffic information to the next judgment target node. apparatus. In the traffic jam information display device according to claim 4 ,
Wherein, when the length of the portion traffic to the node that the determination target of this said next to extend the end side of the present and the traffic jam information is within a predetermined distance, the termination side of the traffic information A traffic jam information display device, wherein the traffic information is extended to the next node to be judged and displayed on the display means. In the traffic jam information display device according to claim 4 or 5,
If the length of the portion extending the terminal side of the traffic jam information is not within a predetermined distance even if there is a traffic light at the next node to be determined, the control means keeps the traffic jam information in an initial state. A traffic jam information display device characterized in that it is displayed on a display means. In the traffic jam information display device according to claim 1 or 4 ,
When the traffic information received by the traffic information receiving unit does not correspond to a node, the control unit extends the traffic information terminal to the node of the road link on which the traffic information is superimposed. A traffic jam information display device characterized by being displayed on a means. In the traffic jam information display device according to claim 7 ,
When the length of the portion extending the end side of the traffic jam information is within a predetermined distance , the control means extends the end side of the traffic jam information to a road link node on which the traffic jam information is superimposed, and displays the display. A traffic jam information display device characterized by being displayed on a means. In the traffic jam information display device according to claim 7 or 8,
The traffic information display apparatus, wherein the control means displays the traffic information on the display means in an initial state when the length of the portion extending the terminal side of the traffic information is not within a predetermined distance. In the traffic jam information display device according to any one of claims 1 to 9,
The center device that is the source of the traffic jam information extracts the current position and direction from the probe data received from the traffic jam information display device, reads the road map data corresponding to the extracted current position and direction from the road map database, When the map is matched with the road link of the road map data read from the road map database, the vehicle speed is extracted from the probe data, and the extracted vehicle speed is less than the predetermined speed with respect to the road link where the current position is map matched , Distribute the traffic information specifying the road link as traffic jam to the traffic information display device,
The traffic information display device, wherein the traffic information receiving means receives traffic information distributed from the center device. Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
The control means, when the end of the traffic information received by the traffic information receiving means corresponds to a node, determines the road type of all the connected road links connected to the node, all connected to the node When the road type of the connected road link is other than a specific road, the next node following the traffic information traveling direction side from the node corresponding to the end of the traffic congestion information is set as the next determination target When the road type of any connected road link connected to the next determination target node is a specific road, the terminal side of the congestion information is processed. Is extended to the next node to be determined and displayed on the display means . In the traffic jam information display device according to claim 11,
Said control means is within a predetermined distance length of the portion extending the end side of one of the road type is and the congestion information Ri particular road der connection road links connected to the node that the determination target of those said next The traffic jam information display device is characterized in that the traffic jam information terminal side is extended to the next node to be determined and displayed on the display means. In the traffic jam information display device according to claim 11 or 12,
Wherein, one of the connections I also road type specific road der road link, part of the length predetermined distance to extend the terminal end side of the traffic congestion information to connect to the node that was the next determination target When it is not within, the traffic information is displayed on the display means in the initial state . Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
The control means determines whether or not there is a traffic light at the node when the end of the traffic information received by the traffic information receiving means corresponds to the node, and when there is no traffic light at the node Processing for determining the road types of all connected road links connected to the next determination target node from the node corresponding to the end of the traffic congestion information as the next determination target next node following the direction of travel of the traffic congestion information And when the traffic signal is present at the next judgment target node , the traffic information is displayed on the display means by extending the terminal side of the traffic information to the next judgment target node. apparatus. In the traffic jam information display device according to claim 14,
Wherein, when the length of the portion traffic to the node that the determination target of this said next to extend the end side of the present and the traffic jam information is within a predetermined distance, the termination side of the traffic information A traffic jam information display device, wherein the traffic information is extended to the next node to be judged and displayed on the display means. In the traffic jam information display device according to claim 14 or 15,
The control means displays the traffic information in the initial state when the length of the portion extending the terminal side of the traffic information is not within a predetermined distance even if a traffic signal exists in the next determination target node. A traffic jam information display device characterized by being displayed on a means.

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