JP2006258669A - Navigation device, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of presenting useful byroad information selectively to users, limiting the extent of displayed byroads. <P>SOLUTION: The navigation device, which searches and informing guides a path a vehicle to move from the departure place to a specified destination, based on the road map data including prepared byroad information, comprises a present position detector 40 detecting the present position of the vehicle, a travelling direction detector 46 detecting the travelling direction of the vehicle, a searching domain discriminator 47 discriminating the region of searched target for byroad information, a byroad searcher 48 searching byroads within the region of searched target by means of the searching region discriminator, and a byroad display controller 49 displaying the byroad detected by means of the byroad searcher 48 identifiably displaying from other paths. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention, for example, in a navigation apparatus that guides and guides a moving route of a moving body, limits the display range of loopholes on a map displayed on a display or the like, thereby improving navigation utility, that is, navigation. The present invention relates to an apparatus, a method, and a navigation program.

  In recent years, with the generalization of automobiles and the development of information processing technology, navigation devices represented by in-vehicle use are rapidly spreading. This navigation device uses the road map data stored in a DVD, HDD, etc. to detect the current position (latitude, longitude, etc.) of the vehicle that is sequentially detected by a geomagnetic sensor, a vehicle speed sensor, a GPS sensor, etc. In addition to displaying above, based on the route data included in the road map data, it calculates the optimal guidance route from the current position to the specified destination, and guides it with specific display or voice synthesis. is there.

In such a navigation device, there is known one having a function of previously storing in a database route information about a road where traffic congestion is likely to occur, displaying the route in different colors, and presenting it to the user (Patent Document 1). . Patent Document 2 discloses a technique for providing a predetermined cost for a road that is expected to be crowded, such as a road in front of a station, so that the road is not selected as a path when searching for a path. .
Japanese Patent No. 3116376 Japanese Patent Laid-Open No. 10-274540

  However, in the conventional navigation device as shown in Patent Document 1 and the like, as shown in FIG. 7, all the escape information (the escape route A and the escape route B) included in the map displayed on the display is displayed. For this reason, it has been difficult for the user to instantaneously determine which exit route to use to approach the destination sooner.

  In FIG. 7, when using the escape route, usually, the route A using the exit route A in the direction of the destination from the current own vehicle position is often used. It is extremely rare to use route B which uses the loop-out route B behind. Therefore, in FIG. 7, the loop-out path B is considered to be information that is less necessary to be displayed.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and its purpose is to limit the range of loopholes displayed and selectively select loophole information with high utility. A navigation technique that can be presented to a user, that is, a navigation apparatus, method, and program.

  In order to achieve the above object, the invention described in claim 1 uses a computer or an electronic circuit to move a moving body from a starting point to a designated destination based on road map data including escape route information prepared in advance. In a navigation device for searching and guiding a route to be guided, a current position detection unit that detects a current position of the moving body, a traveling direction detection unit that detects a traveling direction of the moving body, and a search target for the path information A search area determination unit that determines an area, an escape path search unit that searches for a loop path in the area that is a search target by the search area determination unit, and a loop path detected by the loop path search unit can be distinguished from other paths. And a loop-out display control unit for displaying on the screen.

  The navigation method according to claim 5 is obtained by capturing the invention according to claim 1 from the viewpoint of the method, and the mobile object starts based on road map data including escape information provided in advance by a computer or an electronic circuit. In a navigation method for searching and guiding a route moving from a ground to a specified destination, a step of detecting a current position of the mobile body, a step of detecting a traveling direction of the mobile body, and a search target for loophole information A step of determining a region to be searched, a step of searching for a passage in the region to be searched, and a step of displaying the detected passage so as to be distinguishable from other routes.

  A navigation program according to a ninth aspect captures the invention according to the first and fifth aspects from the viewpoint of a computer program. By controlling the computer, the navigation program includes road map information including pre-installed loopway information. Based on the navigation program for searching and guiding the route of the moving body from the starting point to the designated destination, the program causes the computer to detect the current position of the moving body, and the progress of the moving body. A direction is detected, an area to be searched for loophole information is determined, loopholes in the search target area are searched, and the detected loopholes are displayed so as to be distinguishable from other paths. .

  According to the inventions of the first, fifth, and ninth aspects as described above, the area to be searched for the loophole information is determined, the loophole in the area is searched, and the detected loophole is others. It is possible to efficiently display only loophole information that is highly useful to the user. In addition, since only useful loophole information is displayed, the visibility of the user is significantly improved.

  According to a second aspect of the present invention, in the navigation device according to the first aspect, the search area determination unit has a certain angle left and right with the traveling direction of the moving body detected by the traveling direction detection unit as an axis. It is configured so as to be determined as a search target for loophole information within an area.

  The invention described in claim 6 captures the invention described in claim 2 from the viewpoint of the method, and in the navigation method according to claim 5, the step of determining the search area includes: A region having a certain angle to the left and right with the traveling direction as an axis is determined as a search target for exit information.

  The invention described in claim 10 captures the inventions described in claim 2 and claim 6 from the viewpoint of a computer program. In the navigation program according to claim 9, a method for determining the search area is provided. The region having a certain angle to the left and right with the traveling direction of the moving body as an axis is determined as a search target for the exit path information.

  In the inventions according to claims 2, 6, and 10 as described above, since only the exit path included in the region of the left and right constant angles with the traveling direction of the own vehicle as an axis can be displayed, the user It is possible to efficiently display only the loophole information that is highly useful for the user. In addition, since only useful loophole information is displayed, the visibility of the user is significantly improved.

  According to a third aspect of the present invention, in the navigation device according to the first aspect, the navigation device further includes a destination presence / absence determining unit that determines whether or not a destination is set, and the search region determining unit detects the current position. The present invention is characterized in that the current position of the moving body detected by the section and the destination direction are used as axes, and a region with a certain angle to the left and right is determined as a search target for the exit information.

  The invention according to claim 7 is the one in which the invention according to claim 3 is captured from the viewpoint of the method, and in the navigation method according to claim 5, it is determined whether or not the destination is set. And the step of determining the search area is determined as a search target for pathway information within an area of a certain angle to the left and right with the current position of the moving body and the destination direction as axes. To do.

  The invention described in claim 11 captures the inventions described in claim 3 and claim 7 from the viewpoint of a computer program, and in the navigation program described in claim 9, whether or not a destination is set. The method of determining whether or not the search area is determined is to determine a search target for loophole information within an area of a certain angle from side to side with the current position of the moving body and the destination direction as axes. And

  According to the inventions according to claims 3, 7, and 11 as described above, when a destination is set, between the two points starting from the vehicle position and ending at the destination. Since only the loopholes included in the region of a certain left and right angle can be displayed as the axes, it is possible to efficiently display only loophole information that is highly useful to the user. In addition, since only useful loophole information is displayed, the visibility of the user is significantly improved.

  According to a fourth aspect of the present invention, in the navigation device according to any one of the first to third aspects, it is determined whether or not a traffic obstacle such as a traffic jam exists in the route on the displayed map. A traffic congestion presence / absence determination unit is further provided.

  The invention according to claim 8 captures the invention according to claim 4 from the viewpoint of the method, and in the navigation method according to any one of claims 5 to 7, on the displayed map. The method further includes a step of determining whether or not there is a traffic obstacle such as a traffic jam in the route.

  The invention described in claim 12 captures the inventions described in claim 4 and claim 8 from the viewpoint of a computer program, and in the navigation program according to any one of claims 9 to 11, It is characterized in that it is determined whether or not there is a traffic obstacle such as a traffic jam on the displayed route on the map.

  According to the inventions of claims 4, 8, and 12 as described above, it is determined whether there is traffic on the traveling direction of the vehicle or on the guidance route to the destination. Since the escape route is displayed only when it is determined that there is, there is no less useful escape route displayed when there is no traffic jam. Therefore, it is possible to efficiently display only loophole information that is more useful to the user. In addition, since highly useful escape information is displayed only when a traffic jam occurs, the visibility of the user is significantly improved.

  According to the present invention as described above, it is possible to provide a navigation technology, that is, a navigation device, a method, and a program that can selectively present highly useful loophole information to a user by limiting the range of loopholes to be displayed. can do.

  Next, the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be specifically described with reference to the drawings. In addition, although this embodiment is realizable by controlling the computer provided with the peripheral device by the program, the implementation | achievement aspect of the hardware and program in this case can be variously changed. In addition to the navigation apparatus and method, the present invention can be grasped as a program as described above and a computer-readable storage medium storing such a program. Therefore, in the following description, virtual circuit blocks that implement the functions of the present invention and this embodiment are used.

(1) First Embodiment (1-1) Configuration (1-1-1) Overall Configuration First, a navigation device (hereinafter referred to as “the present device”) in the present embodiment is displayed on a display as a rough outline. By selecting the loophole information included in the predetermined display range from the loopway information included in the map range and displaying it easily, it is possible to secure excellent usability for the user. The following elements shown in the functional block diagram are provided.

  That is, the absolute position / orientation detection unit 1 calculates the absolute position coordinates and direction on the ground surface with respect to the current position of the automobile (referred to as the own vehicle) on which the apparatus is mounted, that is, the own vehicle position. This is a part for receiving GPS radio waves transmitted from GPS satellites with an antenna or a receiver. The relative azimuth detection unit 2 is a part for detecting the relative azimuth of the host vehicle using a gyroscope or the like. The vehicle speed detection part 3 is a part which calculates the speed of the own vehicle by processing the vehicle speed pulse obtained from a motor vehicle.

  The main CPU and its peripheral circuit 4 are parts that serve as a control circuit for controlling the entire apparatus. The memory group M is various memories necessary for the operation of the apparatus. For example, the ROM 5 for storing programs is accessed by the main CPU when the apparatus is activated. A main program is loaded into a dynamic RAM (DRAM) 6 that provides a work area and the like.

  The SRAM (static RAM) 7 is a storage means for acquiring and storing various settings such as the current position, destination, route, and information included in the road map data, and while the main power is off. Is also backed up by a battery and provides memory contents when turned on, but can be replaced by other storage means such as flash memory or hard disk drives. A display VRAM (video RAM) 8 stores bitmap data of an image to be displayed on the display unit 10.

  The display unit 10 is a part that displays various types of information such as a map, an operation menu, a search list, and point information on a liquid crystal display screen (not shown). The voice output means can be used together with the guidance by the synthesized voice. The input unit 11 is a part for a user to input information such as a command from a switch or the like. The input unit 11 includes a touch sensor function, a remote control unit, an infrared transmission / reception unit, and the like, but is configured integrally with the display unit 10 as a touch panel. Or it can be configured as a switch on the front panel. The user interface unit 9 is a user interface that connects the display unit 10 and the input unit 11 to the main CPU and its peripheral circuit 4 using an I / O control circuit, a device driver, or the like.

  The HDD control unit 12 is means for reading various data such as a navigation program recorded in a hard disk (mass storage device) from a database. The database includes various scale map data, a network structure of roads or road sections. Is stored. The road map data includes various point information regarding points on the map. The point information includes, for example, the coordinates of the point, the name of the point, the type of the point, the data for the search list such as the address and the telephone number, the type of the road that the point is in contact with, and the like. In addition, interface data necessary for the navigation program, for example, menus, lists, buttons, guidance displays (direction, distance, time, etc.), various marks (landmarks, icons, current position, travel locus, etc.) may be included. Good.

  The program and data storage locations described above can be realized by various storage media, and it is possible to freely design which storage media to store a part or all of. Therefore, not only the main program but also a part of navigation interface data may be stored in the ROM 5 in advance. Further, instead of the hard disk, a CD-ROM control unit, a DVD-ROM control unit, or the like may use data read from the CD-ROM or DVD-ROM.

  The FM multiplex reception and processing unit 13 is a part that receives FM broadcast waves and extracts desired data such as traffic information of the VICS service from the broadcast waves. The traffic information includes traffic jam information. The optical / radio wave beacon reception and processing unit 14 is a part that receives and processes information such as identification information of each beacon and traffic information of the VICS service from an optical beacon or a radio beacon installed on a shoulder or the like.

(1-1-2) Role of Main CPU and its Peripheral Circuit Further, the main CPU and its peripheral circuit 4 realize the roles as the following parts shown in FIG. 1 by the action of the program as described above. It is configured. That is, the current position detection unit 40 is means for sequentially calculating the own vehicle position, and specifically, is configured to calculate the own vehicle position by combining GPS navigation positioning and autonomous navigation positioning. .

  Here, in GPS navigation positioning, the current position is calculated using information obtained by the absolute position / orientation detection unit 1 based on radio waves from an artificial satellite. In the autonomous navigation positioning, the current position is calculated using information obtained from the relative bearing detection unit 2 and the vehicle speed detection unit 3 based on the geomagnetism and the speed of the host vehicle.

  The destination designation unit 41 is means for receiving designation of a destination, that is, input by facility search from a database in which the road map data is recorded or cursor designation on a map. The route setting unit 42 calculates a route from the current position detected by the current position detecting unit 40 to the destination specified by the destination specifying unit 41 based on the road map data, and obtains the result. It is a means for setting a given route.

  Based on the calculated vehicle position, route and road map data, the map display unit 43 displays a map around the vehicle position or a map displayed in a wide area on the display unit 10 in a three-dimensional display or other manner. It is. Further, the guidance control unit 44 is a means for controlling guidance guidance by determining elements to be displayed in the route, elements such as blinking emphasis, and using combined speech.

  The destination presence / absence determination unit 45 is a means for determining whether the user desires route guidance and sets the destination by the destination designation unit 41. The traveling direction detection unit 46 It is means for detecting the traveling direction of the vehicle. There are many cases where route guidance is not required for the route that the user uses on a daily basis, and a map including the current vehicle position is usually displayed on the display unit 10 such as a display. Even in such a case, traffic obstacles such as traffic jams may occur due to accidents or construction, and the display of exit routes is highly useful. It is configured so that it can be changed.

  The search area determination unit 47 is a means that takes an area of a certain angle to the left and right with the traveling direction of the host vehicle detected by the traveling direction detection unit 46 as an axis, and sets that area as a search target area for a loopway. . For example, FIG. 2 (A) shows a display example of a loophole (dotted line in the figure) in a conventional navigation device, but as is clear from the figure, all of them are shown regardless of the vehicle position and traveling direction. A loophole is displayed.

  On the other hand, FIG. 2 (B) shows a display example of a passage (dotted line in the figure) in the navigation device of the present embodiment, but a range of ± α ° to the left and right with the traveling direction of the vehicle as an axis. Since only the loopholes inside are displayed, the display screen is very easy for the user to see.

  In addition, when the destination is set by the user, the search area determination unit 47 takes an area of a certain angle to the left and right with the two points starting from the vehicle position and the destination as the axis. The region can be set as a search target region for loopholes. For example, FIG. 3A shows a display example of a loophole (dotted line in the figure) in a conventional navigation device, as in FIG. 2A, whereas FIG. As shown, in the navigation device of the present embodiment, the left and right ± α ° about the own vehicle position and the destination direction as the axis, in other words, the two points starting from the own vehicle position and the destination as the end point. Since only loopholes within the range are displayed, the display screen is extremely easy for the user to see.

  Further, the loophole search unit 48 is a means for searching for loopholes included in the area to be searched by the search area determination unit 47 from a database storing loophole information, and the loopway display control unit 49 In order to make it easy to distinguish the loop-path detected by the search unit 48 from the initially displayed guide route, a method different from the normal display method by the map display unit 43 (for example, changing the color or highlighting it) Etc.).

(1-2) Operation Details of the processing according to the present embodiment as described above will be described with reference to the flowchart of FIG. Note that setting a destination and calculating a guidance route from the current position to the destination and performing guidance guidance are the same as in a normal navigation device, and thus description thereof is omitted.

  In FIG. 4, when the navigation device is activated, a map including the current vehicle position is displayed on the display. First, in step 401, the destination presence / absence determination unit 45 determines whether or not the destination is set. The destination is not set, and a map display including the current position of the vehicle is simply displayed on the display. If it is determined that it has been made, the search area determination unit 47 sets the traveling direction ± α ° of the host vehicle as the search range for the exit road in step 402, and the process proceeds to step 404.

  On the other hand, if it is determined in step 401 that the destination is set and the map display including the guidance route to the destination is made on the display, the search area determination unit 47 in step 403. Then, ± α ° with respect to the destination direction and the vehicle position as an axis is set as the search range for the exit path, and the process proceeds to step 404.

  In step 404, the loophole search unit 48 searches for loopholes included in the above-described search range, and the loopway display control unit 49 uses a method (for example, a color change) that is different from the normal display method. , Etc.) (step 405).

(1-3) Effect According to the present embodiment as described above, only the exit path included in the region of a certain left and right angle is displayed with the traveling direction of the host vehicle as the axis, or the destination is set. In this case, it is possible to display only the exit paths included in the area of a fixed angle on the left and right with the vehicle position as the starting point and the destination as the end point. Can be displayed efficiently. In addition, since only useful loophole information is displayed, the visibility of the user is significantly improved.

(2) Second Embodiment This embodiment is a modification of the first embodiment, and in addition to the configuration requirements of the first embodiment, the following configuration requirements are provided, so that the traveling direction of the host vehicle or It is determined whether there is a traffic jam on the guidance route to the destination, and when it is determined that there is a traffic jam, an exit path is displayed. In addition, the same code | symbol is attached | subjected to the member same as the said 1st Embodiment, and description is abbreviate | omitted.

(2-1) Configuration In the present embodiment, as shown in FIG. 5, the congestion presence / absence determination unit 50 determines whether there is a congestion on the traveling direction of the vehicle or on the guidance route to the destination. This is a means for determining whether or not there is a traffic jam by the traffic jam presence / absence judgment unit 50, and a passage is displayed.

  In addition, when it is determined that there is traffic jam in the traveling direction of the own vehicle, the search area determination unit 47 in the present embodiment moves left and right with the traveling direction of the own vehicle detected by the traveling direction detection unit 46 as an axis. An area of a certain angle is taken, and the area is set as a search target area for a loophole.

  In addition, when the destination is set by the user, the search area determination unit 47 determines whether or not the destination is within the traffic jam range. If the destination is within the traffic jam range, , Taking the vehicle position as the starting point and the destination as the end point as an axis, in other words, taking an area of a certain angle to the left and right around the vehicle position and the destination direction as an axis, and searching for a path through that area It may be an area.

  Alternatively, if the destination set by the user is far away, but there is traffic jam before that, on the guidance route and the farthest distance of the traffic jam range as the virtual destination, A region between the two points with the destination as the end point may be used as an axis, in other words, a region with a certain angle may be taken to the left and right with the host vehicle position and the virtual destination direction as an axis, and the region may be used as a search target region for the exit path.

(2-2) Operation Details of the processing according to the present embodiment as described above will be described with reference to the flowchart of FIG. Note that setting a destination and calculating a guidance route from the current position to the destination and performing guidance guidance are the same as in a normal navigation device, and thus description thereof is omitted.

  That is, in FIG. 6, when the navigation device is activated, a map including the current vehicle position is displayed on the display. First, in step 601, the destination presence / absence determination unit 45 determines whether or not the destination is set. The destination is not set, and a map display including the current position of the vehicle is simply displayed on the display. If it is determined that there is a traffic jam in step 602, the traffic jam determining unit 50 determines whether or not there is a traffic jam in the traveling direction. 47, the traveling direction ± α ° of the host vehicle is set as the search range for the exit path (step 603), and the process proceeds to step 612.

  On the other hand, if the destination is set in step 601, normal route search and route guidance are performed, and a map display including the guidance route to the destination is made on the display (steps 604 to 604). 605). Then, in step 606, it is determined whether or not the route guidance is to be terminated. If not, the procedure proceeds to step 607, and the congestion presence / absence determining unit 50 determines whether or not there is traffic on the guidance route. If it is determined that there is a traffic jam, it is determined whether the set destination is within the traffic jam range (step 608).

  If it is determined in step 608 that the destination is within the traffic jam range, the process proceeds to step 609, where the search area determination unit 47 makes a search range for passing through ± α ° with the destination direction and the vehicle position as axes. And go to Step 612.

  On the other hand, if it is determined in step 608 that the destination is farther than the traffic jam range, the process proceeds to step 610, where the search area determination unit 47 sets the farthest traffic jam range as a virtual destination, and the virtual destination region. The direction of the vehicle and the vehicle position is set as an axis, and ± α ° is set as the search range for the exit path, and the process proceeds to Step 612.

  Subsequently, the loophole search unit 48 searches for loopholes included in the search range set in step 603, step 609 or step 611, and the loopway display control unit 49 determines that the loophole is a normal display method. It is displayed on the display in a different manner (for example, changing color, highlighting, etc.) (steps 612 to 613). Thereafter, in step 614, it is determined whether or not the navigation is to be ended. If not, the process returns to step 601 to repeat the processing from step 601 to step 614.

(2-3) Effects According to the present embodiment as described above, not only the same actions and effects as in the first embodiment can be obtained, but also traffic jams on the traveling direction of the own vehicle or on the guidance route to the destination. Since it is determined whether or not there is a traffic jam and the escape route is displayed only when it is determined that there is a traffic jam, the low-utility escape route is not displayed when there is no traffic jam. Therefore, it is possible to efficiently display only loophole information that is more useful to the user. In addition, since highly useful escape information is displayed only when a traffic jam occurs, the visibility of the user is significantly improved.

(3) Other Embodiments Note that the present invention is not limited to the above-described embodiment, and even when a destination is set, a certain angle left and right with the traveling direction of the host vehicle as an axis. Take the area and take that area as the search target area for the exit path, or take an area with a certain angle to the left and right with the host vehicle position and destination direction as the axes, You may comprise so that it can select and display either "the display range by the own vehicle position and the destination direction" as a search object area | region.

  Further, the present invention can be applied to a so-called off-board type navigation system in which the latest data is provided via a wireless communication network instead of the so-called on-board type in which navigation data is placed in the vehicle. It is. In this case, a server outside the vehicle connected via the communication network can perform all or part of the above processing, and the processing result is reduced by the in-vehicle computer to acquire the processing result. be able to. In addition, this invention is not limited to vehicle-mounted use, It is applicable also to another moving means and portable navigation.

The functional block diagram which shows the structure of 1st Embodiment of the navigation apparatus which concerns on this invention. It is a figure which shows the example of a display of a loop way, Comprising: (A) is a display example in the conventional navigation apparatus, (B) is a display example at the time of using the "display range by the own vehicle direction" in the navigation apparatus which concerns on this invention. It is a figure which shows the example of a display of an exit, Comprising: (A) is the example of a display in the conventional navigation apparatus, (B) is the case where "the display range by the own vehicle position and destination direction" in the navigation apparatus which concerns on this invention is used. Display example. The flowchart which shows the procedure of the process in the navigation apparatus of 1st Embodiment shown in FIG. The functional block diagram which shows the structure of 2nd Embodiment of the navigation apparatus which concerns on this invention. The flowchart which shows the procedure of the process in the navigation apparatus of 2nd Embodiment shown in FIG. The figure which shows the example of a display of the escape route in the conventional navigation apparatus, and the driving | running route using the escape route.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Absolute position and direction detection part 2 ... Relative direction detection part 3 ... Vehicle speed detection part 4 ... Main CPU and its peripheral circuit 5 ... ROM
6 ... DRAM
7 ... SRAM
8 ... VRAM
DESCRIPTION OF SYMBOLS 9 ... User interface part 10 ... Display part 11 ... Input part 12 ... HDD control part 13 ... FM multiplex reception and processing part 14 ... Optical / radio wave beacon reception and processing part 40 ... Current position detection part 41 ... Destination designation part 42 ... Route setting unit 43 ... Map display unit 44 ... Guidance control unit 45 ... Destination presence / absence determination unit 46 ... Travel direction detection unit 47 ... Search area determination unit 48 ... Pathway search unit 49 ... Pathway display control unit 50 ... Traffic jam presence / absence determination unit M ... memory group

Claims (12)

In a navigation device that searches and guides a route for a moving body to move from a departure place to a designated destination based on road map data including escape information prepared in advance using a computer or an electronic circuit.
A current position detecting unit for detecting a current position of the moving body;
A traveling direction detector for detecting a traveling direction of the moving body;
A search area determination unit that determines an area to be searched for the loophole information;
An exit path search unit for searching for an exit path in the area targeted for search by the search area determination unit;
An exit path display control unit that displays the exit path detected by the exit path search unit so as to be distinguishable from other paths;
A navigation device comprising:   The search area determination unit is configured to determine a search target for passage information through a region at a certain angle from side to side with the traveling direction of the moving body detected by the traveling direction detection unit as an axis. The navigation device according to claim 1, wherein A destination presence / absence determination unit that determines whether or not a destination is set,
The search area determination unit is configured to determine a search target for exit information through a region at a certain angle from side to side with the current position and destination direction of the moving body detected by the current position detection unit as axes. The navigation apparatus according to claim 1, wherein the navigation apparatus is provided.   The traffic jam presence / absence determining unit that determines whether or not a traffic obstacle such as traffic jam exists on the route on the displayed map is further provided. Navigation device. In a navigation method in which a computer or an electronic circuit searches and guides a route for a moving body to move from a starting point to a designated destination based on road map data including escape route information prepared in advance.
Detecting a current position of the moving body;
Detecting a traveling direction of the moving body;
Determining an area to be searched for loophole information;
Searching for loopholes in the area to be searched;
Displaying the detected loopholes distinguishably from other routes;
A navigation method comprising:   6. The navigation method according to claim 5, wherein the step of determining the search region is to determine a region having a certain angle to the left and right as a search target for exit information with the traveling direction of the moving body as an axis. . Determining whether a destination is set,
6. The step of determining the search area is to determine a search target for exit information within an area of a certain angle from side to side with the current position and destination direction of the moving body as axes. The navigation method described in 1.   The navigation method according to any one of claims 5 to 7, further comprising a step of determining whether or not a traffic obstacle such as a traffic jam exists on the route on the displayed map. In a navigation program that controls and guides a route on which a moving body moves from a departure place to a designated destination based on road map data including escape route information prepared in advance by controlling a computer.
This program is stored in the computer
Detecting the current position of the moving object;
Detecting the traveling direction of the moving body,
Determine the area to search for loophole information,
Search for loopholes in the area that is the search target,
A navigation program for displaying a detected loophole so as to be distinguishable from other routes.   The navigation program according to claim 9, wherein the method for determining the search area is to determine an area with a certain angle to the left and right as a search target for loophole information with the traveling direction of the moving body as an axis. . To determine if the destination is set,
10. The method for determining the search area is to determine a search target for loophole information within an area of a certain angle from side to side with the current position of the moving body and the destination direction as axes. The navigation program described in.   The navigation program according to any one of claims 9 to 11, wherein a determination is made as to whether or not there is a traffic obstacle such as a traffic jam on a route on the displayed map.

Images