JP2012154882A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide "a navigation device".SOLUTION: An inventive navigation device receives encoded information of location codes, directions, extent, and events as road traffic information by an RDS-TMC, and displays event icons according to the events on a road map. The navigation device stores coordinate information which defines a plurality of icon coordinates P1 to P8 on a plurality of links based on the directions and the extent for each of junction sections including the plurality of links associated with the location codes, selects one icon coordinate from the plurality of icon coordinates P1 to P8 based on the received directions and extent, and displays an event icon on the selected icon coordinate.

Description

  The present invention relates to a navigation apparatus having a function of guiding a route to a destination, and more particularly to a method for displaying road traffic information received from the outside.

  A road traffic information system (VICS) that provides real-time road traffic information such as traffic jams, accidents, and regulations via FM multiplex broadcasting, radio wave beacons or optical beacons has been put into practical use. In Europe, the United States, China, and the like, TMC (Traffic Message Channel) is one that distributes road traffic information using RDS (Radio Data System) based on FM multiplex broadcasting. The TMC encodes the location and event where the event occurred, and the navigation apparatus analyzes the received code information and displays an event icon and a congestion line indicating traffic jams, accidents, regulations, etc. on the road map.

  Patent Document 1 prevents an event arrow (for example, a congestion arrow) from being difficult to see due to a scale of a map when displaying an event arrow and an event direction based on road traffic information received by TMC.

JP 2004-361110 A

  In TMC, the encoded road traffic information includes a point (location) where an event has occurred, an event direction (direction), an event range (extent), and an event content (event). The road traffic information is basically provided as a so-called junction unit from ramp to ramp or from interchange to interchange. In the road map database, the navigation device displays an event icon for identifying an event in a junction section having a link associated with the event point.

  In the current navigation apparatus, the coordinate position for displaying the event icon is not prepared in advance, and the event icon is displayed at a predetermined position in the junction section. Traffic events can occur at various points in the junction section, such as the main line and ramps, so when an event icon is displayed at a predetermined position, the event icon is displayed at a position away from the point where the event occurred. In some cases, this may result in an unnatural display and may sometimes give the user incorrect road traffic information.

  An object of the present invention is to solve the above-described conventional problems and to provide a navigation device capable of displaying an event identification mark for identifying an event at a more accurate position.

  An electronic device having a navigation function according to the present invention includes a storage unit that stores road map data, a display unit that displays a road map based on the road map data read from the storage unit, and a code relating to an event occurrence point A section including a plurality of links on road map data associated with an event occurrence point, a receiving means for receiving road traffic information including a sign relating to the direction of the event, a sign relating to the event range, and a sign relating to the event from the outside Coordinate information storage means for storing a plurality of coordinate positions on the plurality of links based on at least a sign relating to the direction of the event and a sign relating to the range of the event, and received by the receiving means. Identifying means for identifying the section based on the road traffic information, and identifying the event based on the sign relating to the event A selection means for selecting an event identification mark; and referring to the coordinate information, selecting one coordinate position from a plurality of coordinate positions of the specified section, and placing the event identification mark at the selected coordinate position Event display means for displaying.

  Preferably, the section includes an internal link connecting an exit and an entrance of a main line and an external link connected to the internal link, and the plurality of coordinate positions are the coordinate position on the internal link and the external link. The event display means selects a coordinate position on the internal link or a coordinate position on the external link according to a code related to the range of the event. Preferably, when the symbol related to the event range indicates the range of the adjacent section, the event display means selects the coordinate position on the external link of the adjacent section. Preferably, the plurality of coordinate positions are start points or end points of the plurality of links. Preferably, the event display means selects a coordinate position on the internal link when a sign related to the event is a ramp event. Preferably, the event display means selects a coordinate position of a start point or an end point of the internal link in response to the ramp event being an exit or an entrance. Preferably, when the sign related to the direction of the event has a first value, the event display means selects a coordinate position on one of the roads of the up line or the down line, and the sign related to the direction of the event When having the second value, the event display means selects a coordinate position on the other road of the down line or the up line. Preferably, the event display means displays a congestion line on a link related to the selected coordinate position when the event is a congestion.

  Display of road traffic information in an electronic device having a function of receiving road traffic information including a code related to an event occurrence point, a code related to an event direction, a code related to an event range, and a code related to an event from the outside according to the present invention The method relates to each of the sections including a plurality of links on the road map data associated with the occurrence point of the event, and at least a plurality of coordinate positions on the plurality of links to a sign relating to the direction of the event and a range of the event A step of preparing coordinate information defined based on a code, a step of displaying a road map based on road map data, a step of receiving road traffic information, and a step of specifying the section based on the received road traffic information; Selecting an event identification mark for identifying the event based on the sign relating to the event, and referring to the coordinate information. And has a step of selecting one of the coordinate positions from a plurality of coordinate positions of the identified section, and displaying the event identification mark selected coordinate position.

  Road traffic information executed by an electronic device having a function for receiving road traffic information including a code related to an event occurrence point, a code related to an event direction, a code related to an event range, and a code related to an event from the outside according to the present invention The display program includes a step of displaying a road map based on the road map data, a step of receiving road traffic information, and a plurality of road map data associated with the occurrence point of the event based on the received road traffic information. Identifying an interval including a link of the event, selecting an event identification mark for identifying an event based on a code relating to the event, and at least a plurality of coordinate positions on the plurality of links for each of the intervals The coordinate information defined based on the sign of the direction of the event and the sign of the range of the event, and A selecting one of the coordinate position from the coordinate position of the number, and displaying the event identification mark selected coordinate position.

  According to the present invention, a plurality of coordinate positions capable of displaying the event identification mark are prepared in advance, and the event identification mark is displayed by selecting the coordinate position from among the coordinate positions. It becomes possible to display the event identification mark accurately. Furthermore, by referring to coordinate information that defines a plurality of coordinate positions, the selection of the coordinate positions is facilitated, and the display time of the event identification mark can be shortened.

It is a block diagram which shows the structure of the navigation apparatus which concerns on the Example of this invention. It is a figure explaining the road traffic information provided by TMC. It is a figure explaining the object range specified by the road traffic information provided by TMC. It is a figure which shows the icon coordinates P1-P8 by a present Example. It is a table explaining the definition of icon coordinates P1-P8. It is a functional block diagram of an event icon display program. It is a flowchart explaining the event icon display operation | movement of the navigation apparatus based on the Example of this invention. It is a figure explaining the selection operation | movement of the icon coordinate which concerns on the Example of this invention. It is a figure which shows selection of the icon coordinate corresponding to case 1 thru | or 3 of FIG. It is a figure which shows selection of the icon coordinate corresponding to case 4 thru | or 6 of FIG. It is a figure which shows selection of the icon coordinate corresponding to case 7 thru | or 10 of FIG.

  Next, an embodiment of the present invention will be described. A navigation device according to an embodiment of the present invention may be realized by a vehicle-mounted electronic device fixed to a vehicle, or a portable information terminal that can be brought into a vehicle, such as a mobile phone, a smartphone, a portable It may be realized by a navigation device or the like. Furthermore, such an in-vehicle electronic device and a portable information terminal are only required to have at least a navigation function, and an audio playback function other than the navigation function, a video playback function, a television reception function, and a function for executing other applications. May be provided.

  Next, FIG. 1 shows the configuration of the navigation apparatus according to the embodiment of the present invention. The navigation device 10 according to the present embodiment is distributed from the outside, a bus interface (I / F) 20 that acquires vehicle operation information, a GPS receiver 30 that receives a signal from a GPS satellite and detects the position of the vehicle. Including a traffic information receiving unit 40 that receives road traffic information, an input unit 50 that receives input from a user, a communication control unit 60 that performs data communication with an external device via wireless or wired communication, and a storage medium such as a large-capacity hard disk Storage unit 70, audio output unit 80 for outputting sound from speaker 82, display control unit 90 for displaying images such as road maps on display 92, program memory 100 for storing programs, and data memory 110 for temporarily storing data The control unit 120 is configured to control each unit by executing a program.

  The bus I / F 20 receives a signal detected by a self-contained navigation sensor (for example, a vehicle speed sensor, an acceleration sensor, a gyro sensor, etc.), a signal indicating on / off of parking of the own vehicle, and provides this to the control unit 120. To do.

  The traffic information receiving unit 40 receives road traffic information by VICS or TMC. In the present embodiment, as a preferred example, an operation when receiving road traffic information by TMC will be described. The TMC multiplexes and transmits the encoded road traffic information in FM radio broadcast, and the traffic information receiving unit 40 decodes the received road traffic information and provides it to the control unit 120.

  FIG. 2 shows road traffic information provided by TMC. The location code (Location code) indicates the number that identifies the point where the event occurred, the direction (Direction) indicates the position or direction within the section specified by the location, and the extent (Extent) indicates the range of the event Or, the event (Event) indicates the content of the event (congestion, accident, regulation, etc.), and the event is classified into one of a plurality (for example, 32) update class (Update Class).

  The TMC transmits information on events that occur in a certain section as a unit. A certain section is typically a section from an interchange to the next interchange on an expressway or freeway, or a section from a ramp to the next ramp, and on an ordinary road from the intersection to the next intersection. It is the interval to. For convenience, such a unit is referred to as a junction unit, and the section is referred to as a junction section. Interchanges, ramps, and intersections are collectively referred to as ramps.

  The number indicated by the location code is associated with the link of the road map data, and the junction section is specified from the associated link. The direction is, for example, 1-bit data, and includes a value of P (Positive) or N (Negative). P and N are used to identify an uplink or downlink link in the junction section. As will be described later, the direction includes a single direction and a bidirectional direction.

  The extent indicates a range of events, and is composed of, for example, 3-bit data. If the extent is 0 or 1, the event is in the junction unit or the junction section specified by the location code. If the extent is 2, the event extends to the adjacent junction unit or section. Indicates.

  The event indicates the content of the event, and is, for example, traffic jam, accident, regulation, lamp closure, or the like. In addition, the event includes an update class (Update class) for identifying whether the event occurs in the lamp or is other than the lamp (that is, main line), and when the update class indicates an event in the lamp, Contains data identifying whether the event in the lamp is an exit or an entrance.

  The input unit 50 includes an operation (touch) panel 52 provided alongside the display 92, a voice input unit 54 that enables input by voice, and a remote controller 56. The communication control unit 60 enables wireless or wired data communication with an external device. Further, road map data may be received from a map distribution server or the like by using a data communication function, and map display or route search may be performed using this. In this case, the storage unit 70 is not necessarily required to store road map data. Furthermore, you may make it acquire the information regarding the own vehicle position from an external network. In this case, the navigation device does not necessarily have to be equipped with the vehicle position detection function.

  The storage unit 70 stores road map data. The road map data includes link data for identifying roads, node data for identifying intersections, facility data for identifying POIs such as facilities, and the like. The link data includes the link length and speed parameter necessary for calculating the link cost according to the attribute, and further includes the road type, the road name, the width, the regulation, the coordinates of the start node and the end node, and the like. The intersection node includes parameters necessary for calculating the node cost according to the attribute, and further includes information indicating the connection relationship between the start node and the end node of the link node, and information such as the intersection type. The facility data includes information on various facilities such as restaurants, gas stations, sightseeing spots, for example, the category (or genre) of the facility, landmarks (or icons) corresponding to the facility data, the coordinates of the facility, and the like.

  The storage unit 70 also stores icon information for displaying an event icon corresponding to the event. Events include, for example, accidents, animals on the road, dangers, delays, driving bans, lane restrictions, parking allowed, parking bans, road obstacles, teams on the roads, road closures, fog, traffic jams, warnings, etc. The storage unit 70 stores image information of event icons respectively corresponding to these events.

  Furthermore, the storage unit 70 stores coordinate information for selecting the display position of the event icon. FIG. 3 is a diagram for explaining a junction section specified by the road traffic information shown in FIG. Here, for easy understanding, the direction in which the link number of the junction section increases is defined as P (Positive) and an uplink, and the direction in which the junction section number decreases is defined as N (negative) and downlink. . For example, when the location code is “4444”, the junction section H is an external link connected to the internal link P4444 connecting the exit and entrance of the main line ramp in the P direction, and the internal link P4443 of the junction section before it. It has a link +4444, an internal link N4444 connecting the exit and entrance of the main line ramp in the N direction, and an external link −4444 connected to the internal link N4445 in the junction section before it. Junction section H means that if the extent becomes 2, it will extend to links P4443 and N4443 or links P4445 and N4445 of adjacent junction sections.

  The storage unit 70 stores coordinate information defining coordinate positions where event icons can be displayed. FIG. 4 shows an example of eight icon coordinates P1 to P8 used in this embodiment, and FIG. 5 is a coordinate table that defines the relationship between the icon coordinates P1 to P8 and the direction and extent. FIG. 4 is an example of the icon coordinates P1 to P8 in the junction section when the location code is “4444”, and the icon coordinates P1 to P8 are set on the link in this junction unit.

  The icon coordinate P1 is defined as the start point of the main link P4444 on the P side, the coordinate P2 is defined as the end point of the external link +4444, the coordinate P3 is defined as the start point of the internal link P4444, and the coordinate P4 is defined as the end point of the internal link P4444. . The coordinate P1 is also the end point of the adjacent internal link P4443, and the coordinate P4 is also the start point of the adjacent external link +4445. Similarly, the icon coordinates P5 to P8 are defined as the start point and end point of the main link N4444 and the external link-4444 in the N direction. The internal link or the external link in the junction section is selected according to the value of the extent. When the extent is “0”, the internal link is selected, and when the extent is “1”, the external link is selected.

  The program memory 100 is a vehicle position detection program 102 that detects a vehicle position based on a detection signal from a self-contained navigation sensor or a GPS receiver 30, and a route search that searches for a route from the vehicle position or a desired position to a destination. A program 104, a route guidance program 106, an event icon display program 108 for displaying an event icon when road traffic information is received, and the like are included. The data memory 110 includes the own vehicle position information 112 detected by the own vehicle position detection program, the road map data 114 read from the storage unit 70, the guidance route information 116 searched by the route search program 104, and the traffic information reception unit 40. The received road traffic information 118 and the like are stored.

  FIG. 6 is a functional block diagram of the event icon display program 108. The event icon display program 108 includes a junction section specifying unit 150, an icon coordinate selection unit 152, an event icon selection unit 154, and an event icon display unit 156. The junction section specifying unit 150 specifies a junction section from the link associated with the received location code. For example, as shown in FIG. 3, if the location code is “4444” and the extent is 1, the P-direction main link P4444, the external link +4444, the N-direction main link internal link N4444, the external link− A junction section consisting of 4444 is identified. If the extent is two or more, the junction section corresponding to “extent-1” is specified.

  The icon coordinate selection unit 152 selects one icon coordinate from the icon coordinates P1 to P8 of the specified junction section. When the extent is “0”, the icon coordinate selection unit 152 selects one of the icon coordinates P3, P4, P7, and P8 on the internal link of the junction section, and if the direction is P, the icon coordinates If either P3 or P4 is selected and the direction is N, either icon coordinates P7 or P8 is selected. The selection of the icon coordinates P3 or P4 and the icon coordinates P7 or P8 is selected according to the information on the exit or entrance of the ramp event. Further, when the extent is “1”, the icon coordinate selection unit 152 selects any one of the icon coordinates P1, P2, P5, and P6. If the direction is P, P1 or P2 is selected, and the direction is selected. If N, P5 or P6 is selected.

  The event icon selection unit 154 searches the icon information stored in the storage unit 70 for an event icon corresponding to the received event, and reads it. The event icon display unit 156 displays the selected event icon on the icon coordinates selected by the icon coordinate selection unit 152.

  Next, the event icon display operation in the navigation device of the present embodiment will be described with reference to the flowchart of FIG. When the navigation device is activated, the control unit 120 calculates the vehicle position based on the position information from the bus / IF 20 and the position information from the GPS receiver 30, and stores the road map data around the vehicle position in the storage unit 70. Are displayed on the display 92 (S101). Next, the control unit 120 monitors whether or not road traffic information is received by the traffic information receiving unit 40 (S102). When the road traffic information is received, the traffic information receiving unit 40 decodes the road traffic information (S103), the information is provided to the control unit 120, and the control unit 120 executes the event icon display program 108.

  The junction section specifying unit 150 specifies a junction section from the links associated based on the location code (S104), and then the icon coordinate selection unit 152 selects one of the icon coordinates P1 to P8 of the specified junction section. Icon coordinates are selected (S105). Next, the event icon selection unit 154 selects an event icon corresponding to the event (S106), and the event icon display unit 156 displays the selected event icon on the selected icon coordinates (S107).

  Next, a specific method for selecting icon coordinates will be described. FIG. 8 is a table showing the selection of icon coordinates for the case 1 to case 10 events. Among them, cases 1 to 6 in FIG. 8A are cases other than the ramp event, and cases 7 to 10 in FIG. 8B are cases of the ramp event. Whether an event is other than a ramp event can be determined from an attribute of the event, that is, an update class into which the event is classified.

  9A to 9C show selection results of icon coordinates of cases 1 to 3, and FIGS. 10A to 10C show selection results of icon coordinates of cases 4 to 6. (A) thru | or (d) are the selection results of the icon coordinate of cases 7-10. In case 1, direction = N and extent = 0. In this case, since the extent is “0”, the internal link N4444 is specified, and the icon coordinate P7 of the start point is selected. That is, the coordinate position P7 on the side in which an event extends with respect to the progress is selected. Thereby, the event icon is displayed on the coordinate position P7 on the road map screen of the display. If the event indicates a traffic jam, an event icon for identifying the traffic jam is displayed, and at the same time, a traffic jam line as indicated by an arrow Y may be displayed. In this case, the traffic congestion line Y can be set from the start point to the end point of the internal link N4444, in other words, the icon coordinates P7 to P8.

  In case 2, direction = N and extent = 1. In this case, since the extent is “1”, the icon coordinate P5 of the start point of the external link +4444 is selected. Again, not the P6 but the near side coordinates are selected. If the event is a traffic jam, the traffic jam line Y is displayed from the icon coordinates P5 to the end point P8 of the internal link N4444.

  In case 3, the direction = N and the extent = 2. In this case, the icon coordinate P5 of the external link-4445 of the junction section adjacent to the specified junction section is selected. That is, when the number of extents is 2 or more, the coordinate P5 of the junction section that is the extent-1 is selected. Cases 4 to 6 are selected in the same manner as cases 1 to 3 except that the direction is P. As shown in FIGS. 10A to 10C, the main line icon coordinates in the P direction are selected. Is done.

  Next, in case 7, direction = N and Update Class = 7 (Exit). When an event is classified as Update Class 7, the event is related to the exit, and if Update Class is 8, the event is related to the entrance. FIG. 11A corresponds to case 7 and the icon coordinate P7 of the start point of the internal link N4444 is selected. If the event is a traffic jam, the traffic jam line Y can be displayed on the ramp road starting from the icon coordinates P7. In Case 8, direction N and Update Class = 8 (Entry). Since the event is related to the entrance, the icon coordinate P8 of the end point of the internal link N4444 is selected. Further, if necessary, the traffic congestion line Y can be displayed on the ramp road having the icon coordinate P8 as an end point. Cases 9 and 10 are the same as Cases 7 and 8 except that the direction is P.

Next, the operation when the direction includes both P and N will be described. 9 and 10, the icon coordinate selection operation in the case where the direction includes a single direction including either P or N has been described. However, in the TMC, the single direction indicating that the direction is one of P or N. , P and N can be included, and identification data indicated by Both Direction can be included. For example, when location code = 4444, Both Direction, direction = P, and extent = 0 as road traffic information, the icon coordinate selection unit 152 determines that both directions (Both Direction), and road traffic information Divide into two and select icon coordinates. In this example, it is divided as follows.
(1) Location code = 4444, direction = P, extent = 0
(2) Location code = 4444, direction = N, extent = 0
When location code = 4444, Both Direction, direction = P, and extent = 1, division is performed as follows.
(1) Location code = 4444, direction = P, extent = 1
(2) Location code = 4444, direction = N, extent = 1
The same division is performed when the extent is 2, 3,.

  When Case 1 to Case 10 are both directions, the above division is performed, and icon coordinates on both main lines of P and N are selected. The broken lines in FIGS. 9A to 9C and FIGS. 10A to 10C indicate the icon coordinates selected in both directions. For example, in case 1, the icon coordinate P3 that is the start point of the internal link P4444 is selected at the same time, and the traffic congestion line can be displayed from the icon coordinate P3 to the end point P4. Also in FIG. 11, the icon coordinates selected in the case of the two-way direction are indicated by broken lines.

  Since existing navigation devices display event icons at the end of the main line in the P direction and the end of the main line in the N direction of the junction section, traffic events may occur when the extent is 0 or at the exit or entrance of the ramp event. When this occurs, the display position of the event icon may move away from the event occurrence location, resulting in an unnatural display. On the other hand, in this embodiment, an event icon can be displayed at a position close to the event occurrence location by setting a plurality of icon coordinates capable of displaying the event icon on the main line of the junction section. Furthermore, in this embodiment, by providing a coordinate table in which icon coordinates are defined as shown in FIG. 5 in advance, it becomes easy to select icon coordinates, and the display operation of event icons can be speeded up.

  In the above embodiment, the example is shown in which the icon coordinates are set to the start point and end point of the internal link and the start point and end point of the external link. One may be sufficient. Further, the icon coordinates may be arbitrary positions on the internal link and the external link, for example, the intermediate coordinates between the start point and the end point of the internal link, or the intermediate coordinates between the start point and the end point of the external link. The intermediate coordinates may be added to the coordinates of the start point and the end point.

  Furthermore, although the example of the road traffic information by TMC was shown in the said Example, this invention is applicable also to the road traffic information equivalent or equivalent to this. Furthermore, the function of the navigation apparatus shown in the above embodiment is an example, and the present invention is not limited to this. Furthermore, when the navigation function is realized by a smartphone, a mobile phone, or the like, it is possible to receive road map data from the map distribution server using a communication means and perform a route search using this.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the present invention described in the claims. Deformation / change is possible.

10: Navigation device 20: Bus interface (I / F)
30: GPS receiver 40: VICS / FM multiplex receiver 50: input unit 60: communication control unit 70: storage unit 80: audio output unit 90: display control unit 100: program memory 110: data memory 120: control unit 150: junction Section specifying unit 152: Icon coordinate selecting unit 154: Event icon selecting unit 156: Event icon displaying unit 156
P1 to P8: Icon coordinates Y: Traffic jam line H: Junction section

Claims (11)

An electronic device with a navigation function,
Storage means for storing road map data;
Display means for displaying a road map based on the road map data read from the storage means;
A receiving means for receiving road traffic information including a code related to an event occurrence point, a code related to the direction of the event, a code related to the range of the event, and a code related to the event from the outside;
For each of the sections including a plurality of links on the road map data associated with the event occurrence point, a plurality of coordinate positions on the plurality of links are based on at least a code related to the direction of the event and a code related to the range of the event. Coordinate information storage means for storing the defined coordinate information;
Identifying means for identifying the section based on road traffic information received by the receiving means;
Selecting means for selecting an event identification mark for identifying an event based on a code relating to the event;
Event display means for referring to the coordinate information, selecting one coordinate position from a plurality of coordinate positions of the specified section, and displaying the event identification mark at the selected coordinate position;
An electronic device. The section includes an internal link connecting the main line exit and the entrance, and an external link connected to the internal link,
The plurality of coordinate positions includes a coordinate position on the internal link and a coordinate position on the external link,
The electronic device according to claim 1, wherein the event display unit selects a coordinate position on the internal link or a coordinate position on the external link in accordance with a code related to the range of the event. 3. The electronic device according to claim 1, wherein the event display means selects a coordinate position on an external link of an adjacent section when a symbol related to the range of the event indicates an adjacent section range. 4. apparatus. The electronic device according to claim 1, wherein the plurality of coordinate positions are start points or end points of the plurality of links. 5. The electronic device according to claim 1, wherein the event display unit selects a coordinate position on the internal link when a code related to the event is a ramp event. 6. 6. The electronic device according to claim 1, wherein the event display unit selects a coordinate position of a start point or an end point of the internal link in response to the ramp event being an exit or an entrance. When the sign related to the direction of the event has a first value, the event display means selects a coordinate position on one of the roads of the up line or the down line, and the sign related to the direction of the event is a second value. The electronic device according to any one of claims 1 to 6, wherein the event display means selects a coordinate position on the other road of the down line or the up line when the value of the event display means has a value of. The electronic device according to claim 1, wherein when the event is a traffic jam, the event display unit displays a traffic jam line on a link related to the selected coordinate position. The code regarding the point of occurrence of the event, the code regarding the direction of the event, the code regarding the range of the event, and the code regarding the content of the event are a location code, a direction, an extent, and an event in the TMC. The electronic device described in one. A road traffic information display method in an electronic device having a function of receiving a road traffic information including a code related to an event occurrence point, a code related to an event direction, a code related to an event range, and a code related to an event from the outside,
For each of the sections including a plurality of links on the road map data associated with the event occurrence point, a plurality of coordinate positions on the plurality of links are based on at least a code related to the direction of the event and a code related to the range of the event. Preparing the defined coordinate information;
Displaying a road map based on the road map data;
Receiving road traffic information;
Identifying the section based on the received road traffic information;
Selecting an event identification mark for identifying an event based on a code relating to the event, and referring to the coordinate information, and selecting one coordinate position from among a plurality of coordinate positions of the specified section;
Displaying the event identification mark at a selected coordinate position;
Display method. This is a road traffic information display program executed by an electronic device having a function for receiving road traffic information including a code related to an event occurrence point, a code related to an event direction, a code related to an event range, and a code related to an event from the outside. And
Displaying a road map based on the road map data;
Receiving road traffic information;
Identifying a section including a plurality of links on the road map data associated with the occurrence point of the event based on the received road traffic information;
Selecting an event identification mark for identifying an event based on a code for the event, and for each of the sections, a plurality of coordinate positions on the plurality of links to at least a code for the direction of the event and a code for the range of the event Selecting one coordinate position from a plurality of coordinate positions of the identified section with reference to coordinate information defined based on the information;
Displaying the event identification mark at a selected coordinate position;
Display program.

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