JP2008292415A - Navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and quickly change a travel index during traveling, to be preferred by convenience and judgement of a user, in a navigation system. <P>SOLUTION: This navigation system is provided with: an input operation part for inputting a destination, and for selecting the respective travel indexes of a distance, a time and a charge; a control part for searching a route; a display part for displaying the route; a position detecting part for detecting a current position; and an information storage part for storing route search information. The control part calculates two or more of the travel indexes from a branch point to the destination in each branch route (S6), in the case of advancing each branch route other than the route along the current route, when own vehicle approaches the branch point (S5), and displays all the travel indexes of the branch routes having the excellent travel index (S8), when at least one of the travel indexes is more excellent than the same kinds of travel indexes in the case of advancing the route along the current route (YES in S7). The user can thereby change quickly the travel index during the traveling, to be preferred by the user. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle navigation apparatus that searches for an optimum route to reach a destination designated by a driver.

  As the vehicle travels, the current position is detected by GPS (Global Positioning System), etc., and the current position is displayed on a display device together with a road map, and an appropriate route from the current position to the destination is displayed. A vehicle navigation device that is set and guided by a display device, an audio output device, or the like contributes to efficient and safe driving for the driver.

  Conventionally, this type of navigation device indicates a travel indicator such as a distance to a destination or an estimated arrival time, non-use of a toll road, etc. as a candidate of a travel indicator to be given priority to the user, and the user gives priority to any one of the indicators. The optimum route is determined by selecting the desired route, and the distance to the destination and the estimated arrival time when the optimum route is traced are displayed. For example, when the user selects “prefer distance”, the route with the shortest distance is determined as the optimum route, and the vehicle travels along this optimum route. However, if you want to change the priority running index for the convenience or judgment of the user while the vehicle is running, it takes time and effort to stop the vehicle and reselect the running index. I couldn't change it. Also, when the travel distance becomes longer and the predicted travel index such as the arrival time and travel cost on the optimal route that was initially set has deviated, for example, the travel index will be given priority to the arrival time or the low price travel priority from “distance priority” In the case where it is desired to change the driving index, the driving index that is given priority during the driving cannot be changed flexibly.

  By the way, as shown in Patent Document 1, in a navigation device that searches and guides a route to a destination, based on the current location information of the detected moving body and the information necessary for the stored route search, the current route There is known a navigation device that searches for a different sub-route and displays and guides the route information of the current route and the sub-route when a moving object approaches a branch point. However, this device first determines a sub-route different from the current route, and when these two routes are merged by intermediary or the like, the destination information (distance to the destination, The required time (predetermined charge) is not presented, so if there are two or more branch routes, such as an intersection, it is presented even if there are other routes with superior destination information other than the current route and sub route. There wasn't.

  Further, as shown in Patent Document 2, in a vehicle navigation apparatus that can be connected to an ETC vehicle-mounted device that performs toll payment for toll road use charges, a guide route that includes a toll road with a toll gate as a guide route to a destination. 2. Description of the Related Art A vehicle navigation device that searches for an optimal guide route by prioritizing search is known. However, this device preferentially guides the guidance route including the toll road, and the user can select the route even if there is another excellent travel indicator route when the toll road is not used. It was difficult.

  Moreover, as shown in Patent Document 3, a route other than the planned travel route is selected as a comparison target route among a plurality of routes obtained by route search, and the current position of the vehicle is displayed on the planned travel route on the road map. On the comparison target route, a navigation device that displays the virtual current position of the vehicle based on the elapsed time from the route search start point is known. However, this device verifies the travel position when actually traveling on the planned travel route and the travel position when it is assumed that the vehicle traveled on another route in real time, and compares the planned travel route with the comparison target route. However, it is troublesome for the user because the data is displayed even if the travel index of the comparison target route is inferior to that of the planned travel route.

  Further, as shown in Patent Document 4, a plurality of search routes to a destination are determined based on the travel history information stored in the past, and can be used without the user setting the priority. There is known a navigation device that can provide route guidance with a priority order that reflects a user's travel preference. This device provides route guidance based on priorities that reflect user preferences, and routes that do not match user preferences even if they have excellent operation indicators are excluded from the targets of route guidance. It was sometimes done. In addition, the configuration is complicated, such as requiring past travel history information.

Further, as shown in Patent Document 5, the search route is extended from the departure side and from the destination side, the previous node and the search cost are stored in each node, and from the departure side and from the destination side. 2. Description of the Related Art A navigation device is known in which a plurality of routes are calculated by obtaining a search cost for each route at the intersection of the routes, and a route is provided with priorities in ascending order of search cost. However, in this device, the user selects a favorite route at the time of departure, and it is difficult to change the travel index flexibly while traveling.
Japanese Patent Laid-Open No. 2001-304890 JP 2006-242700 A JP 2005-24387 A JP 2004-317428 A JP 2002-202137 A

  The present invention has been made to solve the above problem, and in a navigation device that provides route guidance to a destination, when traveling, when it is desired to change a traveling index to be prioritized by user convenience or judgment, An object of the present invention is to provide a navigation device that can be changed easily and quickly.

  In order to achieve the above object, the invention of claim 1 comprises an input means for inputting a destination, a route search means for searching for a route from the current position of the moving body to the destination input by the input means, Information storage for storing guidance means for guiding the route searched by the route search means, current position detection means for detecting the current position of the mobile object, and information necessary for route search (hereinafter referred to as route search information). And the entire apparatus, and based on the current position information detected by the current position detection means and the route search information stored in the information storage means, the current position to the destination A navigation apparatus comprising a control calculation means for calculating at least two or more of the three travel indices of the predicted travel distance, travel time, and travel cost. And further comprising a travel index selection means for the user to select the travel index, wherein the route search means preferentially searches for the optimal route with the travel index selected by the travel index selection means, When the moving body approaches the branch point, the control calculation means, when the mobile body travels on each branch route other than the branch route along the current optimum route among the branch routes branched at the branch point In addition, the value of the two or more travel indices from the branch point to the destination is calculated for each branch route, and at least one travel index of the two or more travel indices is: When the moving body is superior to the same type of travel index when traveling along a branch route along the current optimal route, the travel means of the branch route having this excellent travel index is It is intended to inside.

  According to a second aspect of the present invention, in the navigation device according to the first aspect, the guide means includes display means for displaying the route searched by the route search means, and the control calculation means is the excellent running index. Is displayed on the display means.

  According to a third aspect of the present invention, in the navigation device of the first aspect, the guidance means includes voice guidance means for guiding the route searched by the route search means by voice, and the control calculation means is the superior All the travel indices of the branch route having the travel indices are voice-guided by the voice guidance means.

  According to a fourth aspect of the present invention, in the navigation device according to at least one of the first to third aspects, the navigation apparatus further comprises traffic information receiving means capable of receiving traffic information including road information, and the control calculation means is In addition to the current position information detected by the current position detection means and the route search information stored in the information storage means, based on the traffic information obtained by the traffic information reception means, At least two or more travel indices are calculated.

  According to a fifth aspect of the present invention, in the navigation device according to at least one of the first to fourth aspects, the travel cost includes a toll road fee and a fuel cost.

  According to the first aspect of the present invention, if there is a branch route having an excellent travel index other than the current optimum route for each branch point, the entire travel index of the branch route is displayed. It is possible to select a branch route having a travel indicator simply by changing the traveling direction of the vehicle. As a result, the user can check the driving index of the branch route at every intersection during driving, and if the user wants to change the driving index to be prioritized by the convenience or judgment of the user, the current optimum route can be easily and quickly prioritized. It is possible to change to a branch route having a travel index that the user wants to perform, which increases the convenience of the user's driving travel. In particular, when the travel distance is long, it is difficult to set the best route from the beginning, and the predicted travel index of the optimal route set first often deviates from the initial prediction during travel. In such a case, it is possible to change to a branch route having an index that is prioritized more frequently, so that driving driving that is always close to the user's wish is possible. In addition, the user is guided in the form of proactively proposing that there is another excellent route in addition to the route along the driving index originally selected by the user. The route can be selected, and there are many opportunities for selection.

  According to the invention of claim 2, since all the travel indicators and routes of the branch route having excellent travel indicators can be displayed on the same display means, all the travel indicators can be confirmed simultaneously with the route confirmation, and the branch route can be selected. It can be done quickly and easily.

  According to the third aspect of the present invention, it is possible to know all the travel indexes of the branch route having excellent travel indexes without looking at the route display screen by voice guidance, so that the vehicle branches while traveling more safely. A route can be selected.

  According to the invention of claim 4, since traffic information such as new traffic jam information on the branch route is obtained for each branch point by the traffic information including road information, the accuracy of calculation of all travel indicators is improved.

  According to the invention of claim 5, since the toll road fee and the fuel cost are included in the travel cost, a more detailed travel cost can be calculated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block configuration of a navigation apparatus 1 according to the present invention. The navigation device 1 of this embodiment includes an input operation unit (input unit, travel index selection unit) 2, a position detection unit (current position detection unit) 3, an information storage unit (information storage unit) 4, and a display unit (guidance unit). 5. Voice guidance section (guidance means, voice guidance means) 6, traffic information reception section (traffic information reception means) 7, ETC in-vehicle device 8 and a control section (route search means, control calculation means) 10 for controlling each section. ing.

  The input operation unit 2 has a function of inputting information related to route guidance such as a departure point and a destination and instructing the control unit 10 to perform navigation processing according to the driver's will. As a means for realizing the function, the input operation unit 2 is an operation panel that can input a destination by a telephone number or coordinates on a map or request route guidance by touch operation and key operation, respectively. 21 and a remote control 23, and further includes a voice input unit 22 that can be input by voice input dialogue. The operation panel 21 is configured by providing a touch panel on a display screen of the display unit 5 described later. . By operating the input operation unit 2, the user can perform various instructions and settings such as searching for a route to the destination and changing the setting of the display screen.

  Furthermore, when the user searches for a route, the input operation unit 2 gives priority to the travel index selected from the screen for selecting each travel index of the expected travel distance, travel time, and travel fee displayed on the display unit 5. It has the role of the driving | running | working parameter | index selection means which selects these with the operation panel 21 or the remote control 23.

  The position detection unit 3 uses a satellite navigation system (GPS) to obtain current position information such as the latitude and longitude of the vehicle from a GPS antenna, and the traveling direction of the vehicle is determined by using the geomagnetism. , A gyro sensor 33 for detecting the traveling direction of the vehicle in a relative direction, and a distance sensor 34 for detecting the traveling distance of the vehicle from the rotational speed of the wheels. The position detection unit 3 detects the current position of the vehicle using position information, direction information, distance information, and the like from the GPS receiver 31 and other sensors.

  The information storage unit 4 is an external storage device that stores route search information that is information necessary for route search, such as navigation programs and data, and includes, for example, a CD-ROM, a DVD-ROM, or the like. The information storage unit 4 includes a program for performing processing such as route search, a program and data for display output control necessary for route guidance, a program for interactive guidance by voice input, and data necessary for it, A program for performing voice output control necessary for voice guidance and data necessary for the program are stored. The route search information data stored in the information storage unit 4 includes map data, road data, toll road / ferry usage fee data, search data, guidance data, map matching data, destination data, registration point data (address, telephone Number), genre-specific data, calendar data, and other files. It is also possible to store only data on the CD-ROM and store the program in the control unit 10.

  The display unit 5 is configured by a simple liquid crystal display or the like, and displays guidance information necessary for the user on the screen. Here, the intersection enlarged map screen, the branch enlarged map screen based on the map data and the guidance data processed by the control unit 10, the current route and the branch route being traveled, information on the destination in each route, destination name, time, distance , A direction arrow or the like is displayed. The display unit 5 is provided in an instrument panel in the vicinity of the driver's seat, and the user can confirm the current location of the vehicle by seeing the display unit 5 and obtain information on the route in the future. Further, the display unit 5 can be used as the operation panel 21 using a touch panel provided on the display screen, etc., so that the user can perform point input, road input, etc. by touching the screen or tracing the screen. It is configured.

  The voice guidance unit 6 performs route guidance by voice, and includes a voice output unit 61 that outputs a guidance voice signal formed by the control unit 10 to be described later, and a speaker 62 that amplifies the output voice from the voice output unit 61. It has. By the voice guidance of the voice guidance unit 6, the driver can know the route information without looking at the display unit 5.

  The traffic information receiving unit 7 includes a VICS / FM multiple receiver 71 that sequentially receives current road traffic information outside the vehicle. VICS (Vehicle Information & Communication System) provides road traffic information in real time, and transmits information by FM multiplexing (text broadcasting), radio wave beacon, and optical beacon. The latest road traffic information such as traffic congestion information and traffic accident information from the VICS is transmitted to the control unit 10, and the control unit 10 calculates a driving index on the driving route in consideration of the road traffic information. be able to.

  The ETC in-vehicle device 8 is a stationary transmission / reception device (roadside device) installed at a toll gate in an automatic toll collection (ETC) system that electronically pays tolls at entrances and exits of toll roads such as expressways. ) Is a transmitter / receiver attached to a vehicle for automatically paying a fee. By providing this ETC in-vehicle device 8, it is possible to pass through the toll gate non-stop, saving time, and automatically storing toll road charges during driving, Can be calculated immediately. The toll road fee calculated by the ETC in-vehicle device 8 is transmitted to the control unit 10 and used for the actual calculation of the travel cost of the travel index in the control unit 10.

  The control unit 10 includes a CPU 11, a flash memory 12, a ROM 13, and a RAM 14. The CPU 11 (route search means) executes various calculation processes in addition to route search processing based on route search information in the information storage unit 4, output of route guidance information, and display control of output guidance information. The flash memory 12 reads a program from the CD-ROM of the information storage unit 4 and stores it. The ROM 13 stores a program for performing a program check of the flash memory 12 and a program for updating the program and data stored in the information storage unit 4 based on the program and data stored in the flash memory 12, and the RAM 14 is set. The searched route guidance information such as the point coordinates of the destination and the road name and the data during the calculation process are temporarily stored. In addition, the control unit 10 performs dialogue processing by voice input from the input operation unit 2 or converts voice read from the information storage unit 4 into an analog signal based on a voice output control signal from the CPU 11 to convert the voice guidance signal. As a voice processor for outputting to the voice output unit 61, a sensor input interface for taking in sensor signals from each sensor of the position detection unit 3, and a timepiece for measuring time such as travel time. Note that all the programs used in the present embodiment may be stored in the information storage unit 4, or some or all of the programs may be stored in the ROM 13 of the control unit 10.

  In the control unit 10, the CPU 11 realizes various navigation functions by performing necessary arithmetic processing based on data and programs stored in the information storage unit 4. That is, the CPU 11 predicts the travel from the current position to the destination based on the current position information of the vehicle detected by the position detection unit 3 and the route search information stored in the information storage unit 4 in the route search process. At least two or more travel indices are calculated from the three travel indices of distance, travel time, and travel cost. In addition, when the user searches for a route, the CPU 11 displays on the display unit 5 a selection screen that allows the user to select any one of the three travel indicators of travel distance, travel time, and travel cost. When the user selects one of the three travel indicators by operating the input operation unit 2 from this selection screen, the CPU 11 searches for an optimum route that prioritizes the selected travel indicator. This optimum route search is to search for the shortest travel distance to the destination, the shortest travel time, or the route with the minimum travel cost. For example, the user selected the travel distance as the travel index to be prioritized by the user. In this case, a route that provides the shortest travel distance is searched for as the optimum route.

  In addition, in the calculation of the travel index, the CPU 11 adds the traffic obtained by the traffic information receiving unit 7 in addition to the current position information of the vehicle detected by the position detecting unit 3 and the route search information stored in the information storage unit 4. Based on the information, a driving index is calculated. As a result, it is possible to obtain all travel indices using traffic information such as the latest traffic jam information for each branch point, and a more accurate travel index can be obtained.

  In addition, when the vehicle approaches the branch point, the CPU 11 proceeds from the branch point when the vehicle travels on each branch route other than the branch route along the current optimum route among the branch routes branched at the branch point. The value of two or more driving indicators to the destination is calculated for each branch route, and at least one of the two or more driving indicators indicates that the vehicle is along the current optimal route. When the travel route is superior to the same kind of travel indicator when the vehicle travels along the branch route, all the travel indicators of the branch route having the superior travel indicator are displayed on the display unit 5.

  A flow of the entire system of the navigation device of this embodiment will be described. When the CPU 11 reads the program from the information storage unit 4 and starts the route guidance program, the CPU 11 detects the current position by the position detection unit 3 and displays the surrounding map on the display unit 5 around the current position. In addition, the name of the current position is displayed. Next, when the input operation unit 2 sets a destination using a target name such as a place name or a facility name, a telephone number or an address, a registration point, a road name, and the like, and a priority traveling index is designated, The CPU 11 searches for a route from the current position to the destination. When the route is determined, the CPU 11 tracks the current position by the position detection unit 3, and displays the travel index of the branch route on the display unit 5 at each intersection, and the current route / branch route until the destination is reached. Repeat the guidance.

  At this time, when the vehicle approaches the branch point before arriving at the destination, the CPU 11 searches for a branch route other than the current optimum route, and at least two points from the branch point to the destination are searched for each searched branch route. A running index is calculated. When the calculated travel index in the branch route includes a travel index superior to any one of the two or more travel indexes of the current optimal route, information on all the travel indexes of the branch route is displayed on the display unit 5. The guidance is displayed by being superimposed on the screen, or the voice guidance unit 6 guides the voice. Or, it guides with both screen and voice. As a result, the driver can check the driving index of the branch route at each intersection, so if you want to change the priority of the driving index even while driving, follow the branch route with the selected priority index. By running, it is possible to change the running index immediately prioritized.

  Next, the operation procedure of the navigation device 1 of the present embodiment will be described with reference to the flowchart of FIG. When the user inputs a destination with the input operation unit 2 (S1), and subsequently selects one of the travel indices of travel distance, travel time, and travel cost as a route search condition (here, for example, If the distance is selected (S2), the CPU 11 searches for the route with the shortest distance (S3), and starts route guidance with the searched shortest distance route as the current optimum route (S4). . Next, when the own vehicle approaches the intersection (approx. 200 meters before) (S5), the CPU 11 determines a route other than the branch route along the current optimum route among the branch routes at which the own vehicle branches at the branch point. For each branch route, the value of two or more travel indicators from the branch point to the destination is calculated for each branch route (S6). When at least one of the two or more driving indicators is superior to the same type of driving indicator when the vehicle travels a branch route along the current optimum route (YES in S7), this excellent The total travel index of the branch route having the travel index is displayed on the display unit 5 (S8). When the user selects a branch route different from the current optimum route at this intersection (S9), the CPU 11 displays the route guidance of the branch route selected by the user on the display unit 5 (S10), When it arrives (YES in S11), the guidance is terminated. If NO in S11, the process returns to S5 and the same process is repeated. On the other hand, in the case of NO in S7, the guidance of the current optimum route is continued (S12), and when reaching the destination (S11) as described above, the guidance is terminated. As a result, the user can flexibly select a branch route having an advantageous travel index desired by the user at that time for each intersection, and can always travel along a route close to the desired route. .

  With reference to FIG. 3 (a), (b), the example of driving | running | working of the vehicle along the said operation | movement procedure is demonstrated. 3A shows a road map of a wide area from the starting point A to the destination B, and FIG. 3B shows a road map in which a narrow area near the intersection P in FIG. 3A is enlarged. .

  The user inputs the location (address, telephone number, etc.) of the destination B at the starting point A using the input operation unit 2. Here, it is assumed that the shortest distance is selected as the travel index. When the vehicle travels along route 5R of the traveling road and comes to approximately 200m before intersection P, X direction (extension direction of route 5R) and Y direction (route 12R in the left turn direction intersecting route "5R") at intersection P The road is branched in the Z direction (the direction opposite to the Y direction of the route 12R). Here, the CPU 11 calculates indexes of travel distance, time, and fee when the vehicle travels in the X direction, the Y direction, and the Z direction. As a result, if you proceed in the X direction, it is 44.2km to the destination and the required time is 66 minutes and the fee is 0 yen. If you proceed in the Y direction, the destination is 60.3km and the required time is 52 minutes. 700 yen is displayed, and no running indicator in the Z direction is displayed. As a result, when traveling in the Y direction, the distance is longer and the fare is higher than the direction along the current optimal route (X direction), but there is an advantage that at least the required time is shortened. , Time and fee (running indicator) are displayed in guidance. However, the distance, time, and fee in the Z direction are all inferior to those in the X direction and have no merit.

  As described above, in the route guidance, if there is at least one driving indicator that is superior to the current route, all the driving indicators are displayed, and if there is no merit, no indication is displayed. As a result, the user can easily change the route by turning left in the Y direction at the intersection P and accelerate the arrival when the user wants to prioritize the early arrival time before the intersection P due to personal reasons. be able to. On the other hand, when there is no element superior to the current route as in the Z direction, since the travel indicator is not displayed, unnecessary display at the intersection can be avoided to avoid unnecessary confusion for the user.

  As described above, according to the navigation device 1 of the present embodiment, if there is a branch route having an excellent travel index other than the current optimal route at each branch point, all travel indexes of the branch route are displayed. Therefore, the user can select a branch route having a better driving index only by changing the traveling direction of the own vehicle. As a result, the user can check the driving index of the branch route at every intersection during driving, and if the user wants to change the driving index to be prioritized according to the user's convenience or judgment, the user can easily and quickly change to the driving index he wants to prioritize. It is possible to improve the convenience of driving and driving for the user.

  In particular, when the travel distance is long, it is difficult to set the best route from the beginning, and the predicted travel index of the optimal route set first often deviates from the initial prediction during travel. In such a case, it is possible to change to a branch route having an index that is prioritized more frequently, so that driving driving that is always close to the user's wish is possible. In addition, the user is guided in a form proactively proposing that there is another excellent route in addition to the route according to the driving index originally selected by the user. The route can be selected, and there are many opportunities for selection.

  In addition to screen display guidance, guidance for all travel indicators for branch routes with excellent travel indicators can be provided by voice guidance, so the user can change the route without looking at the screen guidance for the branch route. Safe driving is possible. In addition, since traffic information including road information provides new traffic information on the branch route for each branch point, the calculation accuracy of all travel indices is improved. Further, since the toll road fee and the fuel cost are included in the travel cost, a more detailed travel cost can be calculated.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, in the present embodiment, the display of the travel index to the branch route at the intersection is performed when there is a travel index that is superior in at least one of the at least two travel indexes in the current optimum route in the branch route. In addition, although all the travel indicators of the branch route are displayed, it is also possible to reduce the number of times the travel indicators are displayed by displaying only when two or more or all of the travel indicators are excellent. It is also possible to give an allowable range to the value of each travel index and display a branch route having a travel index within the allowable range.

The block block diagram of the navigation apparatus which concerns on embodiment of this invention. The flowchart for demonstrating the operation | movement procedure of an apparatus same as the above. (A) is a figure for demonstrating the route guidance example of an apparatus same as the above, (b) is an enlarged view of the intersection P vicinity of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Input operation part (input means, driving | running | working parameter | index selection means)
3 Position detector (current position detector)
4 Information storage unit (information storage means)
5 Display section (display means, guidance means)
6 Voice guidance part (voice guidance means, guidance means)
7 Traffic information receiving part (Traffic information receiving means)
10 Control unit (control calculation means, route search means)
11 CPU (route search means)

Claims (5)

An input means for inputting a destination;
Route search means for searching for a route from the current position of the moving body to the destination input by the input means;
Guidance means for guiding the route searched by the route search means;
Current position detecting means for detecting a current position of the moving body;
Information storage means for storing information necessary for route search (hereinafter referred to as route search information);
Control of the entire apparatus, and predicted travel from the current position to the destination based on the current position information of the moving body detected by the current position detection means and the route search information stored in the information storage means In a navigation apparatus comprising a control calculation means for calculating at least two or more travel indexes among three travel indexes of distance, travel time and travel cost,
The vehicle further comprises a travel index selection means for the user to select the travel index,
The route search means preferentially searches for the optimal route with the driving index selected by the driving index selection means by the user,
The control calculation means is
When the mobile object approaches a branch point, the mobile object travels through each branch route other than the branch route along the current optimum route among the branch routes branched at the branch point. The value of the two or more travel indices from the destination to the destination is calculated for each branch route, and at least one of the two or more travel indices is determined by the mobile object When the route is superior to the same type of travel indicator when traveling along a branch route along the optimal route, all the travel indicators of the branch route having this superior travel indicator are guided by the guide means. Navigation device. The guide means includes display means for displaying the route searched by the route search means,
The navigation device according to claim 1, wherein the control calculation means displays all the travel indices of the branch route having the excellent travel index on the display means. The guidance means includes voice guidance means for guiding the route searched by the route search means by voice,
2. The navigation apparatus according to claim 1, wherein the control calculation means voice-guides all the travel indices of the branch route having the excellent travel index by the voice guidance means. A traffic information receiving means capable of receiving traffic information including road information;
In addition to the current position information of the mobile body detected by the current position detection means and the route search information stored in the information storage means, the control calculation means includes traffic information obtained by the traffic information reception means. The navigation device according to at least one of claims 1 to 3, wherein the at least two or more travel indices are calculated on the basis of the information. The navigation device according to claim 1, wherein the travel cost includes a toll road fee and a fuel cost.

Images