JP2006133148A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of properly instructing a driving beginner to turn right or turn left at the time of going out to a road from a parking lot. <P>SOLUTION: Information related to traveling road type, lane number, road width, limiting speed, one-way road and the like of the road to advance from the parking lot is acquired from road data stored in a DVD-ROM 111. Information related to congestion of the road to advance from the parking lot is acquired from a VICS information receiving part 18. Based on the acquired information, the navigation device 1 determines whether the beginner with insufficient driving technique can safely leave the parking lot by right turn or not. When it is determined that it is difficult for the beginner with insufficient driving technique to leave the parking lot by right turn, a route guide for leaving the parking lot by left turn is executed even if it is a detour. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a navigation device that appropriately guides a right turn and a left turn from a non-road area such as a parking lot to a driver who is inexperienced in driving skills such as a beginner driving.

2. Description of the Related Art Currently, there is a navigation device that provides route guidance that allows easy driving while avoiding a right turn and a U-turn as much as possible when selecting "beginner" from a menu displayed on the screen (Patent Document 1).
JP-A-8-254433

  In the navigation device disclosed in Patent Document 1, a beginner is uniformly guided to avoid a right turn as much as possible, so even if the beginner can easily make a right turn, a right turn is avoided and a detour route may be guided. Occur.

(1) The navigation device of the invention of claim 1 includes a current position detecting means for detecting the current position of the vehicle, a search means for searching for a recommended route from the current position detected by the current position detecting means to the destination, and a non-road area. A road that obtains at least one of road information and traffic information of a right-turn entry determination means that determines whether the recommended route searched by the search means as the current location enters the road from a non-road area by making a right turn When a right turn approach is determined by the traffic information acquisition means and the right turn entry determination means, the validity of the right turn is determined based on at least one of the road information and the traffic information acquired by the road traffic information acquisition means. Re-searching means for re-searching a recommended route for entering a left turn from a non-road area to the road.
(2) The navigation device of the invention of claim 2 is searched by the search means for searching for a recommended route from the current location to the destination based on the information transmitted from the vehicle, and by the search means using the non-road area as the current location. A right turn approach judging means for judging whether or not the recommended route enters the road from a non-road area by a right turn, a road traffic information obtaining means for obtaining at least one of road information and traffic information of the approaching road, and a right turn approach When it is determined that a right turn approach is determined by the determination means, the validity of the right turn is determined based on at least one of the road information and the traffic information acquired by the road traffic information acquisition means. A transmitter for re-searching a recommended route to enter, and transmitting information of the recommended route re-searched by the re-search unit to the vehicle. Characterized in that it comprises and.
(3) The invention according to claim 3 is the navigation device according to claim 1 or 2, wherein the road information acquired by the road traffic information acquisition means includes the road type, the number of road lanes, the road width, the road It includes any one of speed limit and one-way information on the road, and the traffic information includes traffic jam information.
(4) In the navigation device according to claim 3, when the road information is the road width, the re-search means has a road width of the road acquired by the road traffic information acquisition means of a predetermined value or more. In this case, it is characterized by re-searching a recommended route for entering the left turn from the non-road area.
(5) According to a fifth aspect of the present invention, in the navigation device according to the third aspect, when the road information is a road speed limit, the re-search means has a predetermined road speed limit acquired by the road traffic information acquisition means. When the value is greater than or equal to the value, the recommended route for entering the left turn from the non-road area to the road is re-searched.
(6) The invention according to claim 6 is the navigation device according to claim 3, wherein when the road information is the road type, the re-search means is configured such that the road type of the road acquired by the road traffic information acquisition means is a national road. When, it is characterized by re-searching the recommended route to turn left into the road from the non-road area.
(7) In the navigation device according to claim 3, when the road information is the number of road lanes, the re-search means has a predetermined number of road lanes acquired by the road traffic information acquisition means. In the above case, the recommended route for entering the left turn from the non-road area to the road is re-searched.
(8) The invention according to claim 8 is the navigation device according to claim 3, wherein when the traffic information is traffic jam information on the road, the re-search means uses the traffic jam information acquired by the road traffic information acquisition means to make a right turn When the lane to be shown is congested, the recommended route for making a left turn from the non-road area to the road is re-searched.
(9) The invention of claim 9 is characterized in that, in the navigation device according to any one of claims 1 to 8, the route is searched for by the re-search means and the recommended route is guided.

  According to the present invention, since the validity of the right turn of the approaching road is determined based on the road information and traffic information of the road entering from the non-road area such as a parking lot, when entering the road from the non-road area It is possible to guide right and left turns appropriately.

  A configuration of a navigation apparatus according to an embodiment of the present invention is shown in FIG. 1 has a function of receiving traffic jam information from the VICS center and displaying the traffic jam status on a display monitor in addition to a normal navigation function such as a map display. The navigation device 1 includes a control circuit 11, ROM 12, RAM 13, current location detection device 14, image memory 15, display monitor 16, input unit 17, VICS (road traffic information system) information reception unit 18, disk drive 19, and communication unit 110. Have. The disc drive 19 is loaded with a DVD-ROM 111 on which map data is recorded.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. When the control circuit 11 performs a predetermined route search process based on the map data stored in the DVD-ROM 111, the processing result is displayed on the display monitor 16 as a recommended route.

  The current position detection device 14 is a device that detects the current position of the vehicle. For example, a vibration gyro 14a that detects the traveling direction of the vehicle, a vehicle speed sensor 14b that detects the vehicle speed, and a GPS signal from a GPS (Global Positioning System) satellite. It consists of a GPS sensor 14c and the like. The navigation device 1 determines a map display range, a route search start point, and the like based on the current location of the vehicle detected by the current location detection device 14, and displays the current location on the map.

  The image memory 15 stores image data to be displayed on the display monitor 16. This image data includes road map drawing data and various graphic data, which are appropriately generated based on map data stored in the DVD-ROM 111 read by the disk drive 19. The navigation device 1 can perform map display and the like by using the image data generated in this way.

  The display monitor 16 provides the driver with various information such as a map near the vehicle position as a screen display based on various information such as map data. The input unit 17 has an input switch for the driver to set the destination of the vehicle, which is realized by an operation panel, a remote controller, or the like. The driver operates the input unit 17 in accordance with instructions on the screen displayed on the display monitor 16 to select a destination and set the destination.

  When the destination is set by the driver, the navigation apparatus 1 performs a route calculation from the current location detected by the GPS sensor 14c to the destination based on a predetermined algorithm. The route thus obtained (hereinafter referred to as a recommended route) is displayed on the screen in a manner different from other roads by changing the display form, for example, the display color. Thereby, the driver can recognize the recommended route on the map on the screen. In addition, the navigation device 1 guides the vehicle by performing route guidance in the traveling direction using a screen or voice to the driver so that the vehicle can travel according to the recommended route.

  The VICS information receiving unit 18 receives VICS information such as traffic jam information supplied from a VICS information center (not shown) and outputs it to the control circuit 11. This VICS information is transmitted mainly by radio beacons installed on highways, optical beacons installed mainly on general roads, or FM multiplex broadcasting. The navigation device 1 receives the VICS information transmitted by them by the VICS information receiving unit 18.

  The disk drive 19 reads the map data for displaying the map on the display monitor 16 from the loaded DVD-ROM 111. The map data may be read from a recording medium other than the DVD-ROM, such as a CD-ROM or a hard disk.

  The map data stored in the DVD-ROM 111 includes road data for drawing a road. The road data includes link data related to section routes (links) divided by predetermined units and node data related to intersections (nodes). The link data and node data include information on road type, width and lane, one-way traffic, speed limit, and link cost data for each link. The link cost of each link is calculated from the link length, link type, average travel time, etc., and is used for route search to search for a recommended route to the destination. The recommended route is, for example, a route that minimizes the sum of the link costs of each link to the destination.

  The communication unit 110 receives information transmitted from a communication center (not shown) and outputs the information to the control circuit 11. Conversely, the communication unit 110 can also transmit the output from the control circuit 11 to the communication center. A communication center transmits various information to the navigation apparatus 1 via a network.

  Specific route guidance by the navigation device 1 according to the embodiment of the present invention will be described with reference to FIG. It is assumed that the vehicle 21 on which the driver rides goes to the destination A from the parking lot 23 of the restaurant 22. At this time, the driver searches the recommended route by setting the parking lot 23 as the current location and setting A as the destination. When a recommended route is searched using the current location as a starting point and A as a destination, a route that minimizes the sum of link costs to the destination is searched as a recommended route. Therefore, the vehicle usually turns right from the parking lot 23 of the restaurant 22. The route 24 is searched as a recommended route.

  An experienced driver can easily enter the route 24 and turn to the destination A by making a right turn. However, a driver who is immature in driving skill may hesitate to make a right turn and proceed to the route 24 depending on the state of a road to depart from or a traffic jam. Therefore, the navigation device 1 according to the embodiment of the present invention performs route guidance as follows according to the situation of the road that enters from the parking lot 23 to a driver who is immature in driving technology.

  As shown in FIG. 3, when the road entering from the parking lot 23 is one-way in the right direction when viewed from the driver, the driver of the vehicle 21 needs to be careful only about the vehicle coming from the left side. However, it is not difficult for an immature driver to make a right turn. Therefore, in this case, the navigation device 1 performs route guidance by calculating the route 31 toward the destination A after turning right at the parking lot 23 as a recommended route.

  As shown in FIG. 4, when the road entering from the parking lot 23 is an opposite lane and there are multiple lanes on one side, turning right from the parking lot 23 toward the destination A will drive from the left and right. You have to pay attention to vehicles coming in multiple lanes. Turning right on such a road is difficult for a driver who is immature in driving skills. In this case, for the safety of a driver who is immature in driving technology, the navigation apparatus 1 performs route guidance using the route 41 which is left from the parking lot 23 and turns left as a recommended route.

  As shown in FIG. 5, when the lane 51 traveling in the right direction on the road entering from the parking lot 23 is congested or congested, if you exit the parking lot 23 and turn right and proceed in the direction of destination A, You have to get into the queue of congested or congested vehicles, paying attention to the vehicles that are traveling from. There may be cases where the vehicle is moving from the right while it is stopped without being interrupted by a congested or congested vehicle line, and turning right in such a situation is difficult for drivers who are immature in driving skills. Accompany. In this case, for the safety of a driver who is immature in driving technology, the navigation device 1 performs route guidance using the recommended route 52 as the route 52 that is left from the parking lot 23 and turns left.

  As shown in FIG. 6, when the width of the road entering from the parking lot 23 is wide, for example, when the road width is 10 meters, if the vehicle turns right from the parking lot 23 and proceeds toward the destination A, the vehicle Before you come, you must cross the wide lane and immediately enter the right lane. The vehicle may travel from the right before crossing a wide lane, and the vehicle may travel from the left even after crossing. Turning right on such a road is difficult for a driver who is immature in driving skills. In this case, for the safety of a driver who is not yet skilled in driving technology, the navigation apparatus 1 performs route guidance using a route 61 that turns left and proceeds as a recommended route.

  As shown in FIG. 7, when the speed limit of the road entering from the parking lot 23 is fast, for example, when the speed limit is 60 km / h, if you turn right from the parking lot 23 and proceed toward the destination A, You must go to the right lane promptly before a fast vehicle comes from the left or right side. Turning right on such a road is difficult for a driver who is immature in driving skills. In this case, for the safety of a driver who is immature in driving technology, the navigation apparatus 1 performs route guidance using the recommended route 71 as a route 71 which is left from the parking lot 23 and turns left.

  As shown in FIG. 8, when the type of road entering from the parking lot 23 is a national road, if the user turns right from the parking lot 23 and proceeds toward the destination A, the national road generally has a lot of traffic. Turning right is difficult for drivers who are not skilled in driving skills. In this case, for the safety of a driver who is immature in driving technology, the navigation apparatus 1 performs route guidance using a route 81 which is left from the parking lot 23 and turns left as a recommended route.

  9 and 10 are flowcharts for explaining a processing process in the control circuit 11 for the navigation device 1 according to the embodiment of the present invention to perform route guidance as described above for a driver who is not yet skilled in driving technology. Shown in 9 and 10 is executed by a program that starts when a destination is input.

  In step S901, the current position detection device 14 detects the current position of the vehicle. Next, in step S902, a recommended route to the destination set with the parking lot that is the current location detected in step S901 as a departure point is searched. In step S903, guidance information such as what guidance is performed at which node from the searched recommended route is created. In step S904, based on the guidance information created in step S903, it is determined whether a right turn is guided to the road entering from the parking lot. If a positive determination is made in step S904, the process proceeds to step S905. If the determination in step S904 is negative, the process proceeds to circle 2. The circle 2 proceeds to step S913, and the recommended route is displayed on the display monitor 16 to provide route guidance.

  In step S905, the road type, the number of lanes, the road width, the speed limit, and the one-way information of the road entering from the parking lot are acquired from the road data stored in the DVD-ROM 111. In step S906, VICS information (traffic information) transmitted from the VICS center is received by the VICS information receiving unit 18, and traffic congestion information on the road entering from the parking lot is acquired from the VICS information. After step S906, the process proceeds to circle 1. After circle 1, the process proceeds to step S907.

  In step S907, it is determined whether or not the road entering from the parking lot 23 is one-way in the right direction when viewed from the parking lot 23, based on the information on the one-way road obtained in step S905, that is, information on the traveling direction of the road. To do. If the determination in step S907 is affirmative, the process proceeds to step S913 to display a recommended route on the display monitor 16 and perform route guidance. If step S907 is negative, the process proceeds to step S908. In step S908, it is determined from the information on the road lane acquired in step S905, that is, information on the number of lanes of the road, whether the road entering from the parking lot 23 is an oncoming lane and is a multiple lane on one side. If step S908 is positive, the process proceeds to step S914. If step S908 is negative, the process proceeds to step S909.

  In step S909, it is determined from the traffic jam information acquired in step S906, that is, traffic information received from the outside, whether the lane going to the right of the road entering from the parking lot 23 is jammed or congested. In the present embodiment, the traffic information is acquired by receiving the VICS information by the VICS information receiving unit 18. If step S909 is affirmative, the process proceeds to step S914. If step S909 is negative, the process proceeds to step S910. In step S910, it is determined whether the road width of the road entering from the parking lot 23 is 10 m or more from the road width information acquired in step S905, that is, information on the width of the road. If step S910 is positive, the process proceeds to step S914. If step S910 is negative, the process proceeds to step S911.

  In step S911, it is determined whether the speed limit of the road entering from the parking lot 23 is 60 km / h or more based on the speed limit information acquired in step S905, that is, information on the speed limit of the road. If step S911 is positive, the process proceeds to step S914. If step S911 is negative, the process proceeds to step S912. In step S912, it is determined whether or not the road type of the road entering from the parking lot 23 is a national road from the road type information acquired in step S905. If step S912 is positive, the process proceeds to step S914. If step S912 is negative, the process proceeds to step S913. In step S913, the recommended route is displayed on the display monitor 16 to provide route guidance.

  In step S914, the link cost of the link going to the right of the road entering from the parking lot 23 is set to infinity. In step S915, a recommended route is searched with the link cost set in step S914. In step S916, guidance information such as what guidance is performed at which node from the searched recommended route is created. Then, the process proceeds to step S913, and route guidance is performed using the guidance information created by displaying the recommended route.

  Next, the recommended route search performed in steps S902 and S915 will be described in detail with reference to FIG. In the recommended route search in step S902, the search is performed using the link cost value included in the map data stored in the DVD-ROM 111 as it is. In this case, the sum of the link cost values of the right direction of the link L1 and the right direction of the link L5 is the left direction of the link L1, the downward direction of the link L2, the right direction of the link L3, the upward direction of the link L4, and the link L5. Since it is smaller than the sum of the link cost values in the right direction, the route 101 that directly proceeds to the node N1 and proceeds to the link L5 is searched for as a recommended route.

  On the other hand, in the recommended route search in step S915, since the link cost in the right direction of the link L1 is set to infinity, the total of the link cost values in the right direction of the link L1 and the right direction of the link L5 is the left of the link L1. This is greater than the sum of the link cost values of the direction, the link L2 downward, the L3 rightward, the L4 upward, and the L5 rightward. Therefore, the route 102 that travels through the link L1, the node N2, the link L2, the node N3, the link L3, the node N4, the link L4, the node N1, and the link L5 is searched as a recommended route.

The navigation device according to the above embodiment has the following operational effects.
(1) When the recommended route turns right from the parking lot and enters the road, if the difficulty of driving operation to enter the road is high, it will guide you to proceed in the left turn direction even if it is a detour. Even a beginner or other inexperienced driver can make a safe departure from the parking lot to his destination.
(2) If it is safe for a driver with inexperienced driving skills to turn right from the parking lot and proceed on the road, route guidance is provided without prohibiting right turn, so unnecessary left turn route guidance is provided. There is no useless detour.

  It is preferable to perform the processes of steps S904 to 912 and S914 to 916 only when the beginner mode is selected from the route search menu displayed on the display monitor 16 for the route guidance of the navigation device according to the above embodiment. Also, the beginner mode may be set in the initial setting menu. Alternatively, the beginner mode may be set when a simple menu prepared so that the driver can easily operate the navigation device is selected.

  Although the case where the vehicle travels from the parking lot to the road has been described in the above embodiment, the vehicle is not limited to the parking lot as long as it is a place other than the road (non-road area). For example, a vacant lot or a gas station may be used.

  In the above embodiment, the road width reference value that makes it difficult for the vehicle to turn right from the parking lot and enter the road is 10 m. However, the road width serving as the reference value can be appropriately changed according to the traffic volume of the road. For example, a road width larger than 10 m may be used if the traffic volume is small, and a road width smaller than 10 m may be used if the traffic volume is high.

  In the above embodiment, the reference speed limit of the road on which it is difficult for the vehicle to turn right from the parking lot and enter the road is set to 60 km / h. However, the speed limit serving as the reference value is appropriately changed depending on the traffic volume of the road. be able to. For example, if the traffic volume is low, the speed may be higher than 60 km / h, and if the traffic volume is high, the speed may be lower than 60 km / h.

  In the above embodiment, information such as the road type, the number of lanes, the road width, the speed limit, and the one-way street of the road entering from the parking lot 23 is acquired from the road data stored in the DVD-ROM 111. May be used to receive road data transmitted from the communication center and obtain information such as the road type, the number of lanes, the road width, the speed limit, and the one-way street of the road entering from the parking lot 23.

  In the above embodiment, the navigation device 1 determines the appropriateness of the right turn of the road entering from the non-road area, and searches for the recommended route. However, the communication center 121 is the navigation device of the road entering from the non-road area. The validity of the right turn may be determined and a recommended route may be searched. The operation of the navigation device 1 when searching for a recommended route using the communication center 121 as a navigation device will be described with reference to FIGS.

  The navigation device 1 transmits the current location information detected by the current location detection device 14 and the destination information set by the driver to the communication center 121 that searches for a recommended route as a navigation device via the communication unit 110. To do. Information on the current location and the destination transmitted from the navigation device 1 is received by the communication center 121 via the network 122. In the communication center 121, a recommended route is searched and guidance information is created based on the received current location and destination information. At this time, steps S902 to S912 and steps S914 to S916 in FIGS. 9 and 10 are performed in the communication center 121. The searched recommended route information and the created guidance information are transmitted to the navigation device 1 via the network 122. The navigation device 1 receives the recommended route information and the guidance information transmitted from the communication center 121 by the communication unit 110. The received recommended route is displayed on the monitor 16 and route guidance is performed. As described above, the navigation device can perform route guidance based on road information or traffic information of a road entering from a non-road area.

  As described above, the communication center 121 determines the validity of a right turn of a road entering from a non-road area as a navigation device, and searches for a recommended route. There is no need for the function to perform the operation, the present location can be detected, the destination can be set, and the recommended route can be displayed. For this reason, even in a navigation device with a simple configuration, appropriate guidance for right and left turns when entering a road from a non-road area based on road information and traffic information of a road entering from a non-road area such as a parking lot Can receive.

The correspondence between the structure of the claims and the structure of the embodiment is as follows.
The current location detection means corresponds to the current location detection device 14, and the search means corresponds to the control circuit 11. The right turn entry determination means corresponds to the control circuit 11, and the road traffic information acquisition means corresponds to the DVD-ROM 111 and the VICS information receiving unit 18. The re-search means corresponds to the control circuit 11, and the recommended route display means corresponds to the display monitor 16. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

It is a block diagram which shows the structure of the navigation apparatus in embodiment of this invention. It is a figure for demonstrating the recommended route when a vehicle approachs a road from a parking lot. It is a figure for demonstrating the recommended path | route when the road where a vehicle approachs from a parking lot is one-way. It is a figure for demonstrating the recommended path | route when there are multiple one-side lanes of the road where a vehicle approachs from a parking lot. It is a figure for demonstrating the recommended path | route when the road into which a vehicle approachs from a parking lot is traffic jam. It is a figure for demonstrating the recommended path | route in case the road width of the road into which a vehicle approachs from a parking lot is 10 m or more. It is a figure for demonstrating the recommended path | route in case the speed limit of the road where a vehicle approachs from a parking lot is 60 km / h or more. It is a figure for demonstrating the recommended path | route when the classification of the road into which a vehicle approachs from a parking lot is a national road. It is a flowchart which shows the recommended route guidance process of the navigation apparatus by embodiment of this invention. It is a flowchart which shows the recommended route guidance process of the navigation apparatus by embodiment of this invention. It is a figure for demonstrating the route search by the navigation apparatus in embodiment of this invention. It is a figure for demonstrating operation | movement of the navigation apparatus when route search is performed in the communication center.

Explanation of symbols

1 Navigation device 11 Control circuit 12 ROM
13 RAM
14 current location detection device 15 image memory 16 output unit 17 input unit 18 VICS information receiving unit 19 disk drive 110 communication unit 111 DVD-ROM
21 Vehicle 22 Restaurant 23 Parking lot 24, 31, 41, 52, 61, 71, 81, 101, 102 Route 121 Communication center 122 Network

Claims (9)

Current location detection means for detecting the current location of the vehicle;
Search means for searching for a recommended route from the current location to the destination detected by the current location detection means;
A right turn entry judging means for judging whether or not the recommended route searched by the search means with a non-road area as a current location enters the road from the non-road area by a right turn;
Road traffic information acquisition means for acquiring at least one of road information and traffic information of the road to enter;
When a right turn approach is determined by the right turn approach determination means, the right turn is determined based on at least one of the road information and traffic information acquired by the road traffic information acquisition means. Re-searching means for re-searching a recommended route for entering the road from the left to the road. Search means for searching for a recommended route from the current location to the destination based on information transmitted from the vehicle;
A right turn entry judging means for judging whether or not the recommended route searched by the search means with a non-road area as a current location enters the road from the non-road area by a right turn;
Road traffic information acquisition means for acquiring at least one of road information and traffic information of the road to enter;
When a right turn approach is determined by the right turn approach determination means, the right turn is determined based on at least one of the road information and traffic information acquired by the road traffic information acquisition means. Re-search means for re-searching the recommended route to enter the road from the left turn,
A navigation device comprising: transmission means for transmitting information on a recommended route re-searched by the re-search means to the vehicle. The navigation device according to claim 1 or 2,
The road information acquired by the road traffic information acquisition means includes any one of road type, road lane number, road width, road speed limit and road one-way information. A navigation device characterized by including traffic jam information. The navigation device according to claim 3,
When the road information is the road width,
When the road width of the road acquired by the road traffic information acquisition unit is equal to or greater than a predetermined value, the re-search unit re-searches for a recommended route to enter the left turn from the non-road area to the road. Navigation device. The navigation device according to claim 3,
When the road information is the speed limit of the road,
The re-search means re-searches a recommended route for entering a left turn from the non-road area to the road when the speed limit of the road acquired by the road traffic information acquisition means is a predetermined value or more. Navigation device. The navigation device according to claim 3,
When the road information is the road type,
When the road type of the road acquired by the road traffic information acquisition unit is a national road, the re-searching unit re-searches a recommended route for entering a left turn from the non-road area to the road. . The navigation device according to claim 3,
When the road information is the number of lanes of the road,
The re-search means re-searches for a recommended route for entering a left turn from the non-road area to the road when the number of lanes of the road acquired by the road traffic information acquisition means is a predetermined number or more. apparatus. The navigation device according to claim 3,
When the traffic information is traffic congestion information on the road,
The re-search means re-searches a recommended route for entering a left turn from the non-road area to the road when the traffic congestion information acquired by the road traffic information acquisition means indicates that the lane entering the right turn is congested. A navigation device characterized by that. The navigation device according to any one of claims 1 to 8,
A navigation apparatus characterized in that route guidance is performed for a recommended route searched by the re-search means.

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