JP3991320B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation apparatus that performs appropriate guidance and display by determining a user's request and driving state.

  2. Description of the Related Art When a user inputs and designates a destination in advance, navigation devices that search for an optimum route and guide the route to the destination are widely used. A conventional navigation device uniquely provides guidance information regardless of the nature of the user, the running state, and the usage state.

In a conventional navigation device, guidance information is provided regardless of a user's running state and usage state, and therefore it is not always possible to provide detailed guidance information to individual users. For this reason, a navigation device has also been proposed in which the user's behavior during past driving is learned and the learning result is reflected in the route search (Patent Document 1).
However, even the above-mentioned proposals cannot provide sufficiently appropriate guidance information for individual users.
JP-A-8-327385

The present invention has been made to solve the above-described problems, and an object thereof is to provide appropriate guidance information to individual users.
For this purpose, the present invention provides a current position detecting means for detecting the current position of the vehicle, a route searching means for searching for a route to the destination, and a detour searching means for searching for a detour with respect to the searched route. Peripheral facility guidance means for searching for facilities around the current position and guiding search results, and the peripheral facility guidance means is detoured by the detour from the facilities around the searched current position The search result is guided by excluding facilities within a predetermined range based on the road of the detour portion of the original route.

  As described above, according to the present invention, search results are guided by excluding facilities within a predetermined range on the basis of a road in a detour portion of an original route detoured by a detour searched from facilities around the searched current position. As a result, the load on the user is reduced and it is possible to concentrate more on driving.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of a navigation device according to the present embodiment.
The navigation device according to the present embodiment includes an input device 1 for inputting information related to route guidance, a current position detection device 2 for detecting information related to the current position of the host vehicle, navigation data necessary for route calculation, and necessary for route guidance. Display / voice guidance data, anthropomorphic character data for notifying guidance information, data accumulated past driving conditions, past navigation device setting data, operation data and programs (application and / or OS), etc. are recorded. Information storage device 3, display / voice guidance processing necessary for route search processing and route guidance, processing for performing search and guidance through anthropomorphic characters, and central processing device 4 for controlling the entire system , For example, road information and traffic information that is information related to vehicle travel, and information on the current position of the vehicle Information transmitting and receiving apparatus 5 or to receive and detect the distribution, the information about the further the current position, and an output device 6 for outputting information on route guidance.

  The input device 1 has a function of inputting a destination and instructing the central processing device 4 to perform a navigation process according to the driver's will. As means for realizing the function, a touch switch, a remote controller, or the like that inputs a destination by a telephone number or coordinates on a map or requests route guidance can be used. It is also possible to add a voice recognition device for enabling voice input and a recording card reading device for reading data recorded on an IC card or magnetic card. In addition, an information center that stores data necessary for navigation and provides information via a communication line at the request of the driver, and a portable type having data such as map data, destination data, simple maps, and building shape maps A data communication device for exchanging data with an information source such as an electronic device can be added.

  The current position detection device 2 obtains the current position information of the vehicle using a satellite navigation system (GPS), an absolute direction sensor that detects the traveling direction of the vehicle in an absolute direction by using, for example, geomagnetism, a vehicle For example, a steering sensor, a relative azimuth sensor that detects the relative azimuth by using a gyro sensor, for example, a distance sensor that detects the travel distance of the vehicle from the rotational speed of the wheel.

  The information storage device 3 is an external storage device that stores a navigation program and data, and includes, for example, a CD-ROM. The program includes a program for performing processing such as route search, a processing program shown in the flowchart described in this embodiment, a display output control necessary for route guidance, a program for performing voice output control necessary for voice guidance, and Necessary data, a program for performing search and guidance notification via anthropomorphic characters, and necessary data are stored. The stored data includes map data, search data, guidance data, map matching data, destination data, registration point data, road data, genre-specific data, landmark data, character data, etc. All necessary data is stored. This embodiment can also be applied to a type in which only data is stored in the CD-ROM and the program is stored in the central processing unit.

  The central processing unit 4 includes a CPU 40 that executes various arithmetic processes, a flash memory 41 that reads and stores a program from a CD-ROM of the information storage device 3, a program that performs program checking and update processing for the flash memory 41 (program reading means) ), The coordinates of the set destination point, and the road name code No. The RAM 43 temporarily stores the searched route guidance information and the data being processed. In addition to this, although not shown in the figure, the voice, phrase, one sentence, sound, etc. read out from the information storage device 3 based on the voice output control signal from the CPU are synthesized and converted into an analog signal. A voice processor for outputting to the speaker, a communication interface for exchanging input / output data by communication, a sensor input interface for capturing the sensor signal of the current position detection device 2, and a clock for entering the date and time in the internal diagnosis information Etc. Note that a program for performing the above-described update processing may be stored in an external storage device.

  The program according to the present embodiment and other programs for executing navigation may all be stored in a CD-ROM which is an external storage medium, or a part or all of these programs are stored in the ROM 42 on the main body side. Also good.

  Various navigation functions are realized by inputting data and programs stored in the external storage medium as external signals to the central processing unit of the navigation apparatus main body and performing arithmetic processing.

  As described above, the navigation device of this embodiment stores a relatively large-capacity flash memory 41 for reading a program from a CD-ROM of an external storage device, and a program (program reading means) for starting up a CD. A small capacity ROM 42 is incorporated. The flash memory 41 is a non-volatile storage unit that retains stored information even when the power is turned off. Then, as a CD start-up process, a program in the ROM 42 as a program reading means is activated and the program stored in the flash memory 41 is checked, and the CD-ROM disc management information and the like of the information storage device 3 are read. The program loading process (update process) is performed based on this information and the state of the flash memory 41.

  The information transmitter / receiver 5 is a GPS receiver that acquires information using a satellite navigation system (GPS), a VICS information receiver that acquires information using FM multiplex broadcasting, radio wave beacons, optical beacons, etc. By using a telephone, a personal computer, etc., it is composed of an information center (for example, ATIS) and a data transmitting / receiving device for bidirectionally communicating information with other vehicles.

  The output device 6 has a function of outputting the guidance information by voice and / or a screen through a personified person when necessary, and printing out the data navigation-processed by the central processing unit 4. Yes. For this purpose, input data is displayed on the screen, a display that displays a route guidance screen, a printer that prints out data processed by the central processing unit 4 or data stored in the information storage unit 3, and voice guidance for route guidance. An output speaker is provided, and the notification means of this embodiment includes a screen display device and an audio output device.

  The display is composed of a simple liquid crystal display, etc., and an enlarged intersection screen based on map data and guidance data processed by the central processing unit 4, destination name, time, distance, direction arrow, anthropomorphic character Etc. are displayed. Since the image data sent to the display is binary image data (bitmap data), a communication line used for serial communication or the like is used instead of a dedicated image signal line. A communication line can also be used. The display is provided with a memory that temporarily holds bitmap data.

  This display is provided in an instrument panel in the vicinity of the driver's seat, and the driver can check the current location of the host vehicle and obtain information on the route from now on by looking at the display. Although not shown in the figure, a tablet including a touch panel, a touch screen, etc. may be used on the display screen, and the point input, road input, etc. can be performed by touching the screen or tracing the screen. Good.

FIG. 2 is a diagram for explaining the flow of the entire system of the navigation device of the present embodiment.
When the program is read from the information storage device 3 to the CPU 40 of the central processing unit 4 and the route guidance program is activated, the current position is detected by the current position detection device 2 and the surrounding map is displayed centering on the current position. At the same time, the name of the current position and the like are displayed (step S1). Next, a destination is set using a target name such as a place name or facility name, a telephone number or address, a registration point, a road name, etc. (step S2), and a route search from the current position to the destination is performed (step S3). ). When the route is determined, the route guidance / display is repeated until the destination is reached while tracking the current position by the current position detection device 2 (step S4). If there is an input for setting a detour before arriving at the destination, a search area is set and re-search is performed in the search area, and route guidance is repeated until the destination is reached in the same manner.

Next, a system for providing appropriate guidance information to individual users will be described. This embodiment always knows what state the user is in, and provides guidance information so as to match the state. As a method for grasping the user's state, (a) time factors, ( (B) Perform guidance based on location factors, (c) navigation device setting status, (d) learning status, (e) user operation status, and so on.
When grasping the state of the user, the above (a) to (e) may be grasped individually and appropriate guidance may be given, or these factors may be comprehensively grasped. . When comprehending each factor, a parameter may be given to each factor (various operating conditions) to quantify it, and the state of the user may be calculated inference. It is also possible to store a multidimensional matrix diagram (table) of guidance contents corresponding to each element and select guidance contents appropriate for the user's condition.

For example, the user status can be ascertained by time factors such as travel duration (or travel distance), travel date / time, time zone (travel position), season, etc. Guess what it is.
Ascertaining the user status based on locational factors is influenced by the location on the route, such as characteristics of the road (travel lane, lane width reduction, tunnel, traffic information (congestion information), road type (general road) , Expressway, toll road), surrounding information (nearest point, guide information, parking lot), positional relationship between departure location and current location, positional relationship between destination and passing point and current location, etc., depending on these factors Guess what state the user is in due to the impact.

The user status can be ascertained based on the navigation device setting status, such as destination or passing point type or selection method, route selection status (priority road priority, distance priority, alternative route, detour), presence / absence of navigation device settings, purpose Guess the user's condition based on the ground characteristics.
Ascertaining the user state based on the learning state, the user's habits during past driving, such as the travel trajectory for the set route, the frequency of re-searching, the timing, frequency, and content of the guidance request during route driving, are ascertained.
The grasping of the user state based on the user's operation state is to learn the past actual operation behavior with respect to the navigation device and to predict the user's behavior based on it.
Next, an example of guidance that matches the grasped user state will be described with reference to the drawings.
Guidance information provided in accordance with the user's grasped and inferred state is a preferable proposal regarding the user's future behavior and driving. The proposal includes notification of information that helps the user's behavior and driving, and update of information that has been proposed so far. When notifying information on the user status, information that will be useful as the user travels from now on, for example, if the route to the destination is set, information on the front of the route, stopover location, etc. Display and suggest a preferred run. When updating information with respect to the user status, for example, the contents set in the navigation device up to now, for example, the destination, route, and other settings are corrected or added to the user. In other words, the guidance for the grasped user state is presentation of information that can be referred to for the user to travel from now on and guidance information for traveling along the route to the destination.

FIG. 3 is a table showing an example of the contents of guidance for the user state ascertained by the time factor.
When the running duration (or running duration) exceeds a certain value, the user is prompted to take a break, and a nearby resting place is searched for guidance. In addition, considering the date and time of travel (position), it proposes suitable destinations and stops, and also guides the gas station. In consideration of the travel time zone, for example, if it is a meal time zone, the surroundings are searched to guide the eating facilities, SA, and PA. It also encourages customers to take a break at SA and PA before leaving the toll road from the general road, and guides souvenir shops, restaurants, and gas stations during the time before leaving the toll road from the general road.

FIG. 4 is a table showing an example of the contents of guidance for the user status ascertained by location factors.
Search for warnings / notifications by searching for characteristics of the route ahead of the current position, such as travel lane, lane width reduction, tunnel presence, etc. In addition, when the tunnel information in the front is obtained by the search, the lighting of the light is prompted.
Means for judging the road type of the road where the current position of the vehicle exists, and when the road type of the current position judged by the means is, for example, an expressway, the SA and PA are guided as a break guide; Also, guide the gas station before entering or leaving the highway.
If there is information to be guided as surrounding information of the current position, it is guided.
Further, for example, a stop-by place is guided according to the positional relationship between the departure point, the destination, the passing point, and the current position.

FIG. 5 is a table showing an example of the contents of guidance for the user state grasped by the setting state of the navigation device.
Here, what the user is acting for is determined according to the state of the navigation setting, and a proposal suitable for the action plan is made.
The navigation setting state includes a destination (point) setting state, a route setting state, a display guidance setting state, and the like. Destination setting status refers to whether a destination such as a hot spring resort or a scenic spot is set as a destination, whether a facility such as a parking lot is pinpointed, a destination is not set, a destination Is set for a place to go regularly or whether the destination is set to a limited place. The route setting state is whether the route setting is prioritized or non-prioritized for a toll road, whether a detour or another route is set, or the like. The display / guidance setting state is whether the scale of the display map is set to a wide area or set in detail.

For example, when the genre of the set destination is a travel destination such as an amusement park or hot spring, a nearby stop such as a restaurant, bank or scenic spot is searched and guided.
If a facility is selected at a pinpoint, the facility is informed of the presence or absence of a parking lot, and if not, the surroundings are searched to guide the parking lot.
If the set route is toll road priority, guide the SA and PA that are facilities on the toll road as a resting place, and if the route is toll road non-priority, search the surrounding search range when encouraging a break, Guide the rest area.
When a detour or another route search is performed for a preset route, it is based on the detoured portion of the original route, for example, the facility facing the detoured portion of the original route or the road of that portion A facility within a predetermined range (such as within a predetermined distance from the road) is excluded from the peripheral search target and the search result is guided. Also, it is determined that the user is in a hurry and no guidance is given to encourage a break.
When the destination is not set, the destination of the genre reflecting the season, weather and date is guided. For example, when the season is autumn and the weather is fine, a valley with autumn leaves is proposed, and when the weather is rain, an indoor facility such as a movie theater is searched and suggested as a destination. Also, when various information can be obtained from the information center via the information transmitting / receiving device 5 through communication, the event held at the current date and time is searched and proposed, and the facility is proposed as the destination. You can also.

When the destination is set as a pinpoint, the presence / absence of the parking lot and the degree of congestion are guided, and the vicinity is searched and guided. For example, when a store stored in advance is selected, it is searched whether or not the store parking lot / affiliated parking lot information is stored. Display time etc. Alternatively, a parking lot is set as a destination and route guidance to the destination is performed. When the partner parking lot is not stored in the parking lot of the store, a time rental parking lot existing around the destination is searched and displayed. When various information can be acquired by communication, it is configured to acquire and display business hours, fees, congestion, etc. as parking lot information, and to select a parking lot to be guided from the information You can also.
When the destination is a place where the destination goes regularly, guidance other than the route is provided, and when the destination is limited, the surroundings of the destination and around the route are searched for guidance.

  In addition, as an example of the display / guidance setting state, the scale of the display map is judged, and in the case of a wide area, the surrounding facilities are searched in a wide range, and in the case of details, the range is narrowed and the search is performed. The search range of surrounding facilities is variable according to the scale.

FIG. 6 is a table showing an example of the content of guidance for the user state grasped by learning of the navigation device.
Here, the user's behavior at the time of past driving is learned, and the user's behavior is predicted based on the learning result. Read from the data and perform route guidance reflecting this.
In addition, the average travel speed (section) is accumulated, the information and a re-search request from the user, or learning that the search is intentionally off the route, and the average travel speed of a certain section is obtained during the route travel. When it falls below the predetermined value, another route is proposed.
When a user's behavior is predicted and another route is proposed based on the result, the searched other route may be displayed together with the original route, and the user may be prompted to select either one or the other route. The route guidance may be automatically switched to the route.

In the case where traffic information is included, another route is proposed by estimating the user's tolerance from the frequency of another route search request for traffic information ahead of the route.
In addition, it learns at what timing the user took a break when traveling for a long time in the past, and guides the learning result in a proposal for a break during a long time travel.

Further, the frequency of the output request of the incidental information of the past user is learned, and the VICS information is periodically sent when the output within the predetermined time or the predetermined distance traveling is more than the predetermined number of times.
In addition, when the user frequently outputs information in front of the route and surrounding information (the output within a predetermined time or within a predetermined distance is more than a predetermined number of times), the information is periodically or constantly sent.
In addition, the user learns how often the user accesses the center to acquire information, and periodically accesses the center to provide information when the output within a predetermined time or within a predetermined distance is greater than a predetermined number of times.

  In addition, the user learns what genre is selected when selecting a destination, and proposes a destination preferentially according to the frequency. For example, for a user who selects a convenience store as a stopover point while traveling on a route, the convenience store is preferentially displayed and a stopover point is proposed. Furthermore, it can be configured to learn by adding information such as date and time, day of the week, season, etc. together with the genre, and provide information by taking into account the date and time and day of the week.

FIG. 7 is a table showing an example of the content of guidance for the user status ascertained from the user's behavior with respect to the navigation device.
When scrolling well during traveling to see the traveling direction of the route (within a predetermined time or a predetermined number of times within a predetermined distance of traveling), the traveling direction is automatically scrolled at regular time intervals or displayed in a frame diagram.

In addition, when searching for a nearby facility often during traveling (a predetermined number of times within a predetermined time or within a predetermined distance of traveling), the periphery is searched at a predetermined timing for guidance.
In addition, when a different route is often searched during traveling (a predetermined number of times within a predetermined time or within a predetermined distance), another route is searched and guided at a predetermined timing.

  In this way, the contents of the guidance for the user status are stored as a table, and by referring to the table according to the grasped user status, detailed and appropriate guidance for each user can be performed. it can. In addition to the above, for example, a table may be prepared in consideration of various factors such as weather conditions, nighttime, number of passengers, family trips, employee trips, etc.

Next, a processing flow for performing the above guidance will be described.
FIG. 8 is a diagram showing a guidance processing flow when the travel duration (travel distance) exceeds a certain value.
During route travel guidance (S11), it is determined whether or not the travel duration (travel distance) exceeds a certain value (S12), and if so, a break is prompted (S13), and the rest area is searched by searching for the surroundings. Guide (S14).

FIG. 9 is a diagram showing a guidance processing flow while entering a highway from a general road. In this process, it is assumed that the user returns using the expressway.
During travel guidance on general roads (S21), it is determined whether the distance to the expressway entrance is within a predetermined distance (for example, 2 km) (S22). When the distance is within the predetermined distance, a surrounding search is performed (S23), Guide to souvenir shops and gas stations.

FIG. 10 is a diagram showing a guidance processing flow when there is a tunnel ahead.
During route travel guidance (S31), it is determined whether or not there is a tunnel ahead (S32). When it is determined that there is a tunnel, guidance is provided to prompt the lights to turn on (S33).

FIG. 11 is a diagram showing a processing flow of break guidance during traveling on a highway.
During route guidance (S41), it is determined whether the road being traveled is a highway as a road type (S42). If it is a highway, a rest area is searched (S43) and SA and PA are guided (S44). ).

  FIG. 12 is a diagram showing a guidance processing flow when the destination genre is travel. During route guidance (S51), it is determined whether or not the genre of the set destination is a trip (S52). If it is a trip, a famous place around the route is searched (S53), and the search result is guided (S54). ).

FIG. 13 is a diagram showing a guidance processing flow depending on whether the set route is paid priority or non-prioritized.
During route travel guidance (S61), it is determined whether or not the route selection has priority for pay (S62). When pay priority is given, SA and PA are guided as resting places (S63), and when the pay non-priority is selected, the peripheral search range is selected. The rest area is searched for (S64), and the search result is guided (S65).

FIG. 14 is a diagram showing a flow of performing guidance processing based on the learning result.
During route travel guidance (S71), the average travel speed of a certain section is compared with the learning result to determine whether the average travel speed is smaller than the learning result value (S72). Is proposed (S74).

FIG. 15 is a diagram showing a flow of performing guidance processing based on the actual action of the user with respect to the navigation device.
During route travel guidance (S81), it is determined whether or not there has been an action to look closely at the travel direction of the route, and if so, the screen is automatically scrolled in the travel direction at regular intervals (S83).

Next, an example will be described in which anthropomorphic characters are displayed on the screen and searched for, guided, or guided by telop through the characters. The following shows an example in which a traveling state is determined and an appropriate traveling plan is proposed.
FIG. 16 is a diagram showing an example of searching and guiding around the destination.
For example, a guide character appears in the lower right corner of the screen near the destination (FIG. 16A). The appearance of the character is performed when the system determines that guidance is required, but it may be made to appear by manually triggering. The route extends upward from the lower center of the screen, and a mark displaying a triangle mark in the circle indicates the vehicle position. Next, although not shown, the character walks around the destination and searches for the surroundings. At this time, it is displayed that the character is searching with a motion of walking around. When the search is completed, the user returns to the original position and faces the front to guide the search result. In the illustrated example, a surrounding parking lot (landmark P on the screen) and a one-way street (arrow on the screen) are guided (FIG. 16B).

FIG. 17 is a diagram illustrating an example of a case where a change occurs by examining the road situation in the traveling direction of a route that is currently running.
In this example, the distance from the current location and the state of change are guided by display and voice through the character, and it is guided that there is a lane decrease 2 km ahead. Although illustration is omitted, the character approaches the route from a predetermined position on the screen, moves forward on the route and searches, and when the search is completed, returns to the original position as shown. May be.

FIG. 18 is a diagram showing another example of a case where a change occurs when the road condition in the traveling direction of the currently traveling route is investigated.
In this example, it is displayed that there is a junction 2 km ahead in the telop.

FIG. 19 is a diagram illustrating another example of a case where a change occurs when the road condition in the traveling direction of the currently traveling route is investigated.
In this example, guidance is provided by using a telop. FIG. 19A shows an example in which there is a tunnel 2 km ahead, and FIG. 19B warns that it is an accident-prone point.

FIG. 20 is a diagram showing an example in which characters appear on the screen from the traveling direction of the currently traveling route.
In this example, the character searches for a route traveling direction and returns along the route to report the search result. When searching forward, the character is displayed so as to move forward along the route.

FIG. 21 is a diagram illustrating an example of prompting a break by displaying the current running state.
After the departure, the mileage has reached 180 km and the running time is 2 hours is displayed on the screen, and a break is urged by the character by display and voice.

FIG. 22 is a diagram illustrating an example of proposing break points.
A message is displayed on the screen indicating that the mileage has reached 180 km since the departure, and the running time is 2 hours. The character prompts the user to take a break with display and voice, and confirms the user interactively. When the request is confirmed, the nearest rest point is suggested by display and voice.

FIG. 23 is a diagram showing an example of guiding real-time information that the user wants to know.
Real-time information (such as FM multiplex broadcasting) that the user wants to "prefer everyday", "interest", or "want to know regularly" is guided through the character. In the example shown in the figure, today's weather is fine, the temperature is maximum 32 ° C., and the minimum 21 ° C. is displayed on the screen.

  As described above, according to the present invention, the load on the user is reduced, and it is possible to concentrate more on driving, so the industrial applicability is extremely large.

It is a figure which shows the structural example of the navigation apparatus for vehicles of this embodiment. It is a figure for demonstrating the flow of the whole system of this embodiment. It is a figure which shows the table of the example of the content of the guidance with respect to the user state grasped | ascertained with the time factor. It is a figure which shows the table of the example of the content of the guidance with respect to the user state grasped | ascertained by the place factor. It is a figure which shows the table of the example of the content of the guidance with respect to the user state grasped | ascertained by the setting state of the navigation apparatus. It is a figure which shows the table of the example of the content of the guidance with respect to the user state grasped | ascertained by learning of the navigation apparatus. It is a figure which shows the table of the example of the content of the guidance with respect to the user state grasped | ascertained from the user's action with respect to a navigation apparatus. It is a figure which shows the guidance processing flow when driving | running | working continuation time (traveling distance) exceeds a fixed value. It is a figure which shows the guidance processing flow during entering a highway from a general road. It is a figure which shows the guidance processing flow in case there exists a tunnel ahead. It is a figure which shows the processing flow of the break guidance during driving | running | working on a highway. It is a figure which shows the guidance process flow in case the genre of the destination is a trip. It is a figure which shows the guidance processing flow by whether the set route | route is pay priority or non-priority. It is a figure which shows the flow which performs a guidance process based on a learning result. It is a figure which shows the flow which carries out a guidance process based on the user's actual action with respect to a navigation apparatus. It is a figure which shows the example which searches and guides the destination periphery. It is a figure which investigates the road condition of the route advancing direction currently driving | running | working, and shows an example in case a change arises. It is a figure which investigates the road condition of the route advancing direction currently driving | running | working, and shows the other example when a change arises. It is a figure which investigates the road condition of the route advancing direction currently driving | running | working, and shows the other example when a change arises. It is a figure which shows the example where a character appears on a screen from the direction of a route currently traveling. It is a figure which shows the example which displays the present driving state and encourages a break. It is a figure which shows the example which proposes a break point. It is a figure which shows the example which guides the real-time information which a user wants to know.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Input device, 2 ... Current position detection device, 3 ... Information storage device, 4 ... Central processing unit, 5 ... Information transmission / reception device, 6 ... Output device

Claims (1)

Current position detecting means for detecting the current position of the vehicle;
A route search means for searching for a route to the destination;
A detour search means for searching for a detour route to the searched route,
Surrounding facility guide means for searching for facilities around the current position and guiding search results;
Have
The surrounding facility guidance means guides a search result by excluding facilities within a predetermined range based on the road of the detour portion of the original route detoured by the detour from the facilities around the searched current position. A navigation device characterized by that.

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