JP4556589B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device.

  Conventionally, in a navigation apparatus mounted on a vehicle such as an automobile, when an operator such as a driver operates a predetermined input unit to set a destination, the destination and the current position detection processing unit detect the destination. Based on the current position of the vehicle, a route from the current position to the destination is searched, and the searched route is guided. In this case, the route is searched so that the distance from the current position to the destination is the shortest, or the route is searched so that the required time is the shortest.

In addition, a system for transmitting road traffic information to a navigation device is also provided so that an optimum route avoiding a traffic jam section can be searched by receiving road traffic jam information (see, for example, Patent Document 1). ). For example, in a road traffic information communication system called VICS (R) (Vehicle Information & Communication System), information on traffic control systems such as the police and the Japan Highway Public Corporation is collected and information on traffic jams and traffic Road traffic information such as regulation information is created and transmitted to the navigation device by communication means. And the navigation apparatus which received the said road traffic information can perform DRG (Dynamic Route Guidance) which searches the path | route which avoids traffic congestion based on the said road traffic information.
Japanese Patent Laid-Open No. 7-8385

  However, in the conventional navigation device, regardless of the personal characteristics of the driver, a route that avoids traffic congestion is searched and the searched route is guided. Therefore, even if there is some traffic jam on the route to the destination, it does not fit the personal characteristics of the driver who tends to prefer to travel along the original route without changing the route. End up. Further, in the conventional navigation device, if the difference between the required time when traveling along the original route and the required time when traveling along the route avoiding traffic congestion does not exceed a predetermined value, the traffic jam occurs. The route that avoids traffic is not guided, so even if a slight traffic jam occurs, it will not conform to the personal characteristics of the driver who tends to change the route and prefer to avoid the traffic jam .

  The present invention solves the problems of the conventional navigation device and guides a route that avoids traffic congestion based on the personal characteristics of the driver, thereby providing a route that matches the personal characteristics of each driver. An object is to provide a navigation device capable of guiding.

Therefore, in the navigation device of the present invention, a navigation device that searches for a route to a set destination and provides guidance, the storage means for storing search data, and the destination based on the search data A route search unit that searches for a route, a traffic information processing unit that causes the route search unit to search for a route using traffic information, and a guidance processing unit that provides guidance for the searched route. parts are searched for when the congestion avoiding interval occurring in periphrastic (U) times pathway congestion on the path has occurred, the guidance processing unit on the basis of the personal characteristics of the driver The threshold value corresponding to the difference between the route serving as a reference for guiding the detour route and the detour route is changed.

  According to the present invention, the navigation device guides a route for avoiding traffic jam based on the personal characteristics of the driver. Therefore, each driver does not feel annoyed and does not feel frustrated or stressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a diagram for explaining the personal characteristics of the driver in the embodiment of the present invention.

  In the present embodiment, the navigation device is a vehicle navigation device mounted on a vehicle such as a passenger car, a truck, a bus, or a motorcycle, and includes a calculation means such as a CPU and an MPU, a storage means such as a semiconductor memory, a magnetic disk, and an optical disk. A kind of computer having a communication interface and the like. The navigation device includes a GPS (Global Positioning System), a geomagnetic sensor, a distance sensor, a steering sensor, a beacon sensor, a gyro sensor, a current position detection processing unit that detects a current position, map data including road data, search data, and the like A data recording unit as a storage means for storing a route, a route search process for searching for a route to a set destination based on inputted information, a route guidance process, a POI (Point for searching a point or facility) of Interest) A navigation processing unit that performs various arithmetic processes such as a navigation process such as a search process, an input unit, a display unit, a voice input unit, a voice output unit, and a communication unit, and has a route to a set destination. Search and give guidance.

  The data recording unit stores map data including search data and the like. That is, the data recording unit includes a database composed of various data files, and in addition to search data for searching for a route, a display map of the display unit displays a guide map along the searched route, In order to display other guidance information, various data such as facility data are recorded. Note that the data recording unit also includes information on links, which are units constituting a road. The data recording unit also records various data for outputting predetermined information by the audio output unit.

  The input unit is for correcting a position at the start of traveling or inputting a destination, such as an operation key, a push button, a jog dial, a cross key, etc. arranged in the navigation device body. However, it may be a remote controller. When the display unit is a touch panel, it is preferable that the display unit includes operation switches such as operation keys and operation menus displayed on the display screen of the display unit. In this case, input can be performed by touching the operation switch like a normal touch panel, that is, by touching.

  The display screen of the display unit displays operation guidance, operation menus, operation key guidance, a route from the current position to the destination, guidance information along the route, and the like. As the display unit, a CRT, a liquid crystal display, an LED (Light Emitting Diode) display, a plasma display, a hologram device that projects a hologram on a windshield, or the like can be used.

  In the present embodiment, the navigation processing unit includes a route search unit that searches for a route from the input departure point to the destination, a traffic information processing unit that acquires and processes traffic information as information used for the search, And a guidance processing unit for guiding the searched route.

  Here, the route search unit searches for a route from the departure point to the destination as in a normal navigation device. Normally, the current location of the vehicle is automatically input as the departure location, but the operator can input an arbitrary location as the departure location. Then, the route search unit accesses a database stored in the data recording unit to search for a route so that the distance from the departure point to the destination is the shortest, or a route so that the required time is the shortest Explore. In this case, the route search unit searches for a route with reference to the traffic information acquired by the traffic information processing unit, and when it is determined that a traffic jam has occurred on the route based on the traffic information, DRG for searching for a route that avoids the section is performed.

  The traffic information processing unit obtains traffic information including traffic jam information such as a traffic jam section position, a traffic jam section length, a vehicle speed of the traffic jam section, a traffic jam degree of the traffic jam section, a traffic jam trend of the traffic jam section, and the like. Process information. For example, VICS (R) information that is traffic information provided by VICS (R), traffic information provided by other traffic information providing centers, actual travel data of the vehicle that is a travel history acquired by the vehicle, probe car It is possible to acquire traffic information such as actual travel data of other vehicles, which is travel history information provided by other vehicles. Note that the traffic information is preferably acquired in association with a VICS (R) link or a road link. Here, the road link is a unit constituting a road, and is usually delimited with an intersection of three or more roads as a boundary. And in a normal navigation apparatus, road link ID as an identification number which identifies a road link is provided. In addition, the traffic information processing unit accumulates past traffic information as necessary, statistically processed statistical traffic information, traffic such as own vehicle or other vehicle travel history information as actual travel data, etc. Information can be stored in a data recording unit or the like.

  When the route searched by the route search unit is set as a guidance target route, that is, as a guidance route, the guidance processing unit follows the guidance route or the guidance route on the display screen of the display unit. The route guidance is performed by displaying the guidance information or by outputting the guidance information from the voice output unit. Further, the guidance processing unit grasps the personal characteristics of the driver by learning, and changes the standard for guiding a route for avoiding traffic jam based on the grasped personal characteristics.

  In this case, the personal characteristics of the driver are, for example, a tendency or tendency to prefer to drive along the original route without changing the route even if some traffic congestion occurs on the route to the destination. Also, even if a slight traffic jam occurs, there is a tendency or tendency to change the route and avoid the traffic jam. Here, as shown in FIG. 2A, description will be made assuming that a route 11 to the destination is searched and set, and the vehicle is traveling along the route 11. Reference numeral 12 denotes a current position mark indicating the current position of the vehicle, and reference numeral 13 denotes a section where a traffic jam occurs, that is, a traffic jam section. In this case, first, the navigation processing unit determines whether there is a traffic jam on the route 11 from the current position of the vehicle to the destination based on the traffic information acquired by the traffic information processing unit, that is, on the route 11. Whether or not there is a traffic jam section 13 based on traffic information is repeatedly determined at predetermined time intervals (for example, 16 [msec]).

  When there is a traffic jam section 13 based on traffic information on the route 11, the route search unit of the navigation processing unit searches for a route that avoids the traffic jam section 13, that is, a bypass route 14 as shown in FIG. DRG is performed to As a result of performing the DRG, when a new route, that is, the detour route 14 is found, the guidance processing unit changes the route 11 to the destination to a route that passes the detour route 14 and changes the route of the changed route. Give guidance. That is, when the vehicle reaches within a predetermined distance before the branch point to the detour route 14, guidance that passes the detour route 14 is displayed on the display screen of the display unit, or is output from the voice output unit. .

  Here, as a personal characteristic, even if there is some traffic jam on the route 11 to the destination, the driver tends to prefer to travel along the original route 11 without changing the route. If it is a person who has, it will be troublesome to change the course, etc., so it is considered that the vehicle travels as indicated by the bold line in FIG. That is, the vehicle travels along the route 11 to the destination without traveling along the detour route 14 that avoids the traffic jam section 13.

  In addition, when the driver is a person having a tendency or tendency to change the route and avoid the traffic jam even if a slight traffic jam occurs on the route 11 to the destination as a personal characteristic, Even if it gets involved in a slight traffic jam, it feels frustrated or feels stress, so it is considered that the vehicle travels as shown by a thick line in FIG. That is, the vehicle travels along the detour route 14 that avoids the traffic jam section 13.

  It should be noted that even if a slight traffic jam occurs on the route 11 to the destination, a driver who has a tendency or a tendency to change the route and avoid the traffic jam can perform a DRG, that is, a detour route. Even when the guidance 14 is not performed, when it is detected that a traffic jam has occurred on the route 11 to the destination, the user selects the detour route 14 that avoids the traffic jam section 13 and selects the detour route. 14 is considered to run along the road.

  Therefore, in the present embodiment, the guidance processing unit grasps the personal characteristics of the driver, and determines whether or not to guide the detour route 14 that avoids traffic jam based on the grasped personal characteristics. The threshold value that is the standard of the vehicle is changed, and a route that matches the personal characteristics of the driver is guided. The threshold value is the difference between the time required when passing through the route 11 where the initially searched traffic jam occurs and the time required when passing through the newly searched traffic route 14 avoiding the traffic jam. It is a numerical value corresponding to. That is, the required time is shortened by changing the route and passing the detour route 14. When the difference is equal to or greater than a threshold value, the detour route 14 is guided.

  In this case, as the threshold value, for example, 180 seconds is set as an initial value in advance. The initial value is set for a driver having an average personal characteristic. When the traffic information acquired by the traffic information processing unit detects that a traffic jam has occurred on the route 11 originally searched, the route search unit performs DRG to avoid the traffic jam section 13. The route 14 is searched. Then, the guidance processing unit calculates the difference between the required time when passing through the route 11 and the required time when passing through the detour route 14, determines whether the difference is equal to or greater than a threshold, and exceeds the threshold. If so, the detour route 14 is guided.

Note that the guidance processing unit tends to prefer to drive along the original route 11 without changing the route even if the driver's personal characteristics cause some traffic congestion on the route 11. When it is determined that the threshold value is determined, the threshold value is updated so that a new value is obtained by adding a constant value, for example, 30 seconds, from the threshold value. Therefore, the standard for guiding a route that avoids traffic congestion becomes high, and guidance for the detour route 14 becomes more difficult. Therefore, not greater shortening degree of time required due to the through bypass path 14 by changing the path, i.e., the detour path 14 benefits large and only lever by passing through the guide rows of the detour path 14 It will not be broken. Thus, the driver having the personal characteristics is not bothered by the guidance of the detour route 14.

  In addition, when it is determined that the personal characteristics of the driver tend to prefer to change the route and avoid the traffic jam even if a slight traffic jam occurs on the route 11, The threshold value is updated so that a constant value, for example, a value obtained by subtracting 30 seconds from the threshold value becomes a new threshold value. Therefore, the standard for guiding a route that avoids traffic congestion is lowered, and guidance of the detour route 14 is more easily performed. Therefore, even when the degree of shortening the required time by changing the route and passing the detour route 14 is small, that is, even if the merit by passing the detour route 14 is small, the detour route 14 is guided. become. As a result, the driver having the personal characteristics does not enter the traffic jam section 13 and feel frustrated or feel stressed.

  Next, the operation of the navigation device having the above configuration will be described.

  FIG. 1 is a flowchart showing the operation of the navigation device according to the embodiment of the present invention.

  Here, the operation | movement which grasps | ascertains a driver | operator's personal characteristic by learning the driver | operator's action with respect to the result of having performed DRG is demonstrated. In this case, first, DRG processing is performed to search for a detour route 14 that avoids the traffic jam section 13, that is, a new route. Subsequently, the guidance processing unit determines whether or not a value obtained by subtracting the time required for the new route from the time required for the conventional route is equal to or greater than a threshold value. That is, it is determined whether or not the difference between the required time when the route 11 is initially searched and the required time when the route is newly searched is greater than or equal to the threshold value. If the difference is not greater than or equal to the threshold value, the process ends.

  If the difference is equal to or greater than the threshold, the guidance processing unit guides a new route. Subsequently, the guidance processing unit determines whether or not the vehicle has traveled along the conventional route, that is, whether or not the vehicle has traveled along the route 11 originally searched. This is because even if DRG is performed and guidance for a new route is performed, the driver does not necessarily drive the vehicle along the new route.

  When the vehicle does not travel along the originally searched route 11, that is, when the vehicle passes a newly searched route, the guidance processing unit sets the personal characteristics of the driver to avoid traffic congestion. And That is, even if a slight traffic jam occurs on the route 11, it is determined that the tendency or propensity to change the route and avoid the traffic jam section 13. And the said guidance process part subtracts n second from the said threshold value, and complete | finishes a process. That is, the threshold value is updated so that a value obtained by subtracting a certain value from the threshold value becomes a new threshold value, and the process is terminated. However, the subtracted value should not be less than 0 seconds. The n as a constant value can be set arbitrarily. In addition, the guidance processing unit can be regarded as having no problem with the current threshold value. That is, the threshold value can be left unupdated.

  On the other hand, when the vehicle travels along the originally searched route 11, that is, when the vehicle does not pass through the newly searched route, the guidance processing unit sets the personal characteristics of the driver to avoid congestion. And That is, even if some traffic jam occurs on the route 11, it is determined that it is a tendency or a tendency to travel along the route 11 originally searched without changing the route. And the said guidance process part adds n second to the said threshold value, and complete | finishes a process. That is, the threshold value is updated so that a value obtained by adding a certain value to the threshold value becomes a new threshold value, and the process is terminated.

Next, a flowchart will be described.
Step S1: DRG processing is performed.
Step S2: It is determined whether or not the value obtained by subtracting the time required for the new route from the time required for the conventional route is equal to or greater than the threshold value. If the value obtained by subtracting the time required for the new route from the time required for the conventional route is equal to or greater than the threshold, the process proceeds to step S3. If the value obtained by subtracting the time required for the new route from the time required for the conventional route is not equal to or greater than the threshold. The process ends.
Step S3: A new route is guided.
Step S4: It is determined whether or not the vehicle has traveled on the conventional route. If the vehicle travels on the conventional route, the process proceeds to step S6, and if the vehicle does not travel on the conventional route, the process proceeds to step S5.
Step S5: Set the driver's personal characteristics as characteristics to avoid traffic jams, and subtract n seconds from the threshold value, or terminate the process with no problem at the current threshold value.
Step S6: The driver's personal characteristics are set so as to avoid traffic congestion, and n seconds is added to the threshold value, and the process is terminated.

  Next, the operation in the subroutine of step S1 will be described.

  FIG. 3 is a flowchart showing a subroutine of DRG processing in the embodiment of the present invention.

  First, the route search unit acquires travel route information. The travel route information is information related to the route 11 to the destination that was initially searched as the travel route, and the shape of the route 11, the distance to the destination on the route 11, and travel along the route 11. It includes information such as the time required to reach the destination. Subsequently, the route search unit acquires traffic jam information in the traveling direction of the travel route. That is, traffic jam information on the route 11 in the forward direction of the vehicle is acquired. The traffic jam information is included in the traffic information acquired by the traffic information processing unit. Consists of traffic jam trends.

  Subsequently, the route search unit calculates a new route in consideration of traffic jam and ends the DRG process. That is, the detour route 14 as a route that avoids the traffic jam section 13 is searched and the DRG process is terminated. The detour route 14 is a route whose required time is shortened by passing through the detour route 14 while avoiding the traffic jam section 13.

Next, a flowchart will be described.
Step S1-1: Travel route information is acquired.
Step S1-2: Congestion information in the traveling direction of the travel route is acquired.
Step S1-3: A new route is calculated in consideration of the traffic jam and the DRG process is terminated.

  Next, an operation for grasping the personal characteristics of the driver by learning without performing DRG will be described.

  FIG. 4 is a flowchart showing an operation when DRG is not performed in the navigation device according to the embodiment of the present invention.

  In this case, first, a traffic jam is detected on the travel route or the travel destination of the travel road. Here, when the route 11 to the destination is searched in advance and the vehicle is traveling along the route 11, the traffic jam ahead in the traveling direction as the traveling destination on the route 11 as the traveling route is It is detected based on traffic information acquired by the traffic information processing unit. Further, when the route 11 to the destination is not searched, the traffic jam ahead in the traveling direction on the road on which the vehicle is currently traveling is detected based on the traffic information acquired by the traffic information processing unit.

  Subsequently, the guidance processing unit determines whether or not the route or the destination has been changed by turning left or right. That is, when the vehicle is traveling along the route 11, it is determined whether the vehicle is traveling along a route other than the route 11 originally searched by changing the route. Further, when the route 11 to the destination is not searched, it is determined whether or not the vehicle has deviated from the road that has traveled up to the present time by changing the traveling direction.

  When the route or the destination is changed, the guidance processing unit sets the personal characteristics of the driver as characteristics that avoid traffic congestion. That is, even if a slight traffic jam occurs on the route 11, it is determined that the tendency or propensity to change the route and avoid the traffic jam section 13. And the said guidance process part subtracts n second from the threshold value used as the reference | standard for determining whether to guide the detour route 14 which avoids traffic congestion, and complete | finishes a process. That is, the threshold value is updated so that a value obtained by subtracting a certain value from the threshold value becomes a new threshold value, and the process is terminated. However, the subtracted value should not be less than 0 seconds. The n as a constant value can be set arbitrarily.

  Further, when the route or the destination is not changed, the guidance processing unit sets the personal characteristics of the driver as characteristics that avoid traffic congestion. That is, even if some traffic jam occurs on the route 11, it is determined that it is a tendency or a tendency to travel along the route 11 originally searched without changing the route. And the said guidance process part adds n second to the said threshold value, and complete | finishes a process. That is, the threshold value is updated so that a value obtained by adding a certain value to the threshold value becomes a new threshold value, and the process is terminated. In addition, the guidance processing unit can be regarded as having no problem with the current threshold value. That is, the threshold value can be left unupdated.

Next, a flowchart will be described.
Step S11: A traffic jam is detected on the travel route or on the traveling road.
Step S12: It is determined whether or not the route or destination has been changed by turning left or right. If the route or destination has been changed by turning left or right, the process proceeds to step S13. If the route or destination has not been changed by turning left or right, the process proceeds to step S14.
Step S13: The driver's personal characteristics are set to avoid traffic congestion, and n seconds are subtracted from the threshold value, and the process is terminated.
Step S14: The driver's personal characteristics are set to characteristics that avoid congestion, and n seconds is added to the threshold value, or the process is terminated with no problem at the current threshold value.

  Next, an operation for guiding the detour route 14 on the basis of the threshold value changed based on the personal characteristics of the driver ascertained by learning will be described.

  FIG. 5 is a diagram showing a display screen of the navigation device according to the embodiment of the present invention.

  The navigation device searches for the route 11 to the destination, and when traveling along the route 11 is started, continuously repeats the DRG process at a predetermined time interval, and the route on the route 11 ahead of the traveling direction of the vehicle. The detour route 14 that avoids the traffic jam section 13 is searched. The operation of the DRG process is the same as that in the flowchart shown in FIG. Then, it is determined whether or not the difference between the required time when passing through the route 11 and the required time when passing through the detour route 14 is equal to or greater than a threshold value. If the difference is equal to or greater than the threshold value, the guidance processing unit Will guide the new route.

  In this case, as shown in FIG. 5, it is desirable to display the difference between the required time when passing through the route 11 and the required time when passing through the detour route 14 on the display screen of the display unit. Here, if the personal characteristics of the driver ascertained through learning are characteristics that avoid traffic jams, even if the degree of shortening the required time due to changing the route and passing the detour route 14 is small, that is, shortening Since the detour route 14 is guided even if the required time is short, as shown in FIG. 5A, even if the required time to be shortened is 2 minutes, for example, Information is provided.

Further, when the personal characteristics of the driver comprehended by learning a characteristic that does not avoid congestion, if Kere size reduce the degree of time required due to the through bypass path 14 by changing the path, i.e., shortening If required time Kere length is, since the guide of the detour path 14 is performed, as shown in FIG. 5 (b), when the required time is shortened is 10 minutes, the guide of the detour path 14 is carried out .

  As described above, when the required time to be shortened when passing through the detour route 14 is displayed, the driver whose personal characteristic is a characteristic for avoiding traffic congestion can recognize that the required time is reduced even a little. So I don't feel frustrated or stressed. In addition, a driver whose personal characteristics are characteristics that do not avoid traffic jams can recognize that the required time is significantly increased when traffic jams are avoided, so there is no annoyance.

  By the way, the threshold value can be set for each day of the week, every time zone, every place, etc.

  FIG. 6 is a table showing threshold values in the embodiment of the present invention.

As an initial value of the threshold, a table as shown in FIG. 6 can be created in advance and stored in the data recording unit. In this case, the threshold is set to a value corresponding to each day of the week, each time zone, each place (for example, a region divided by a distance from a registered point such as a home), and the like. It is assumed that the position of a registration point such as home is registered in advance in the navigation device. In the example shown in FIG. 6 , the threshold is set to increase as the distance from the home increases. This is because it can be considered that it is a place where the geography is unguided for the driver as the distance from the home increases, and it is desirable that the route is not changed so much in a place where the geography is unguided. As shown in FIG. 6, the detour route 14 can be guided more appropriately by finely setting the threshold value according to the day of the week, the time zone, the location, or the like. The threshold value may be changed between a weekend and a weekday, or may be changed in the case of fifty days (every day), consecutive holidays, consecutive holidays, Bon holidays, New Year holidays, summer holidays, and the like.

  As described above, in the present embodiment, the personal characteristics of the driver are grasped by learning, and the detour route 14 that avoids the traffic jam section 13 is guided based on the grasped personal characteristics. More specifically, when the guidance of the detour route 14 searched by the DRG is performed, whether the driver's personal characteristic is a characteristic that avoids traffic congestion depending on whether or not the vehicle has traveled along the detour path 14. , Determine whether it is a characteristic that avoids traffic jams. If the driver's personal characteristics are characteristics that avoid traffic jams, the standard is lowered by subtracting a certain value from a threshold value that serves as a standard for determining whether to guide the detour route 14, and driving If the personal characteristic of the person is a characteristic that avoids traffic congestion, a certain value is added to the threshold value to raise the standard.

  Therefore, when the driver's personal characteristics are characteristics that avoid traffic congestion, guidance of the detour route 14 becomes easier, and the degree of reduction in required time due to changing the route and passing the detour route 14 is reduced. Even if it is small, that is, even if the merit by passing through the detour route 14 is small, the detour route 14 is guided. Thus, the driver does not enter the traffic jam section 13 and feel frustrated or feel stressed.

Further, when the driver's personal characteristics are characteristics that do not avoid traffic congestion, guidance of the detour route 14 becomes more difficult, and the required time is shortened by changing the route 11 and passing the detour route 14. be large degree, i.e., only a large benefits of having passed through the detour path 14 lever, so that guidance of the detour path 14 is not performed. Thus, the driver is not bothered by the guidance of the detour route 14.

  In addition, as described in the flowchart shown in FIG. 4, the grasp of the driver's personal characteristics by learning can be performed even when the DRG is performed and the detour route 14 is not guided. .

  Further, in the present embodiment, as a reference for determining whether or not to guide the detour route 14, the time required for passing through the route 11 where the traffic jam occurs and the case of passing through the detour route 14 are described. Although only the example using the difference with the required time has been described, the degree of congestion can also be used as the criterion. In this case, the congestion degree is weighted to actively avoid the congestion section 13. Then, the personal characteristics of the driver are added to the weighting. For example, when the weighting as an initial value is 4, the weighting is changed to 5 when the personal characteristics of the driver are characteristics that avoid traffic congestion. Thereby, it becomes more sensitive to traffic jams, and the guidance of the detour route 14 becomes easier.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a flowchart which shows operation | movement of the navigation apparatus in embodiment of this invention. It is a figure explaining the driver | operator's personal characteristic in embodiment of this invention. It is a flowchart which shows the subroutine of the DRG process in embodiment of this invention. It is a flowchart which shows operation | movement when not performing DRG of the navigation apparatus in embodiment of this invention. It is a figure which shows the display screen of the navigation apparatus in embodiment of this invention. It is a table which shows the threshold value in embodiment of this invention.

Explanation of symbols

11 Route 13 Traffic jam section 14 Detour route

Claims (6)

A navigation device that searches and guides a route to a set destination,
(A) storage means for storing search data;
(B) a route search unit that searches for a route to the destination based on the search data;
(C) a traffic information processing unit that causes the route search unit to search for a route using traffic information;
(D) a guidance processing unit for guiding the searched route,
(E) the route search unit searches for a detour route to avoid the period in which the congestion is occurring if congestion has occurred on the path,
(F) The guidance processing unit changes a threshold value corresponding to a difference between the route serving as a reference for guiding the detour route and the detour route based on a driver's personal characteristics. Navigation device. The navigation device according to claim 1, wherein the guidance processing unit grasps a personal characteristic of the driver by learning a driver's behavior with respect to the detour route. The guidance processing unit, when the personal characteristics of the driver is a characteristic to avoid congestion of the reference low by changing the threshold value, is a characteristic of personal characteristics of the driver does not avoid the congestion The navigation device according to claim 1, wherein in the case, the threshold is changed to increase the reference. The threshold value, duration and any one of claims 1 to 3 with the difference between the required time is the corresponding threshold value in the case of through the bypass path when passing through the route congestion is occurring The navigation device described in 1. The guidance processing unit determines that the personal characteristic of the driver is a characteristic that avoids traffic when the driver passes the detour path, and the driver determines that the personal characteristic of the driver does not pass the detour path. The navigation device according to any one of claims 1 to 4 , wherein the personal characteristic of the driver is determined to be a characteristic that avoids traffic jams. The threshold value, the day of the week, the navigation device according to claim 1 which is set according to the time zone or location.

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