JP4766319B2 - Navigation device, navigation method, and navigation program - Google Patents

Description

  The present invention relates to a navigation device, a navigation method, and a navigation program.

  2. Description of the Related Art Conventionally, a navigation device that guides a discount received on a route to a destination when a destination is set on a toll road that can receive a discount when a predetermined discount condition is satisfied (for example, Patent Document 1). When the discount is guided, the driver can save the travel fee by appropriately adjusting the travel time zone and the travel distance so that the conditions for receiving the discount are satisfied.

  However, the driver does not always set the destination. For this reason, according to the conventional navigation device, there is a possibility that the discount cannot be received because the destination is not set although the discount is received.

JP 2005-073333 A

  The present invention has been made to solve the above problem, and provides a navigation device, a navigation method, and a navigation program for guiding a driver that a discount can be received even if a destination is not set.

(1) A navigation apparatus for achieving the above object is discounted to a toll road traveling fee that allows a traveling fee to be discounted when the user enters a discounted time zone from a predetermined discounted zone or gets off the discounted zone during the discounted time zone. Storage means for storing discount conditions that are to be satisfied in order to be applied and include at least the discount section to which the discount is applied and the discount time zone as a condition; and on the toll road, When the vehicle passes through the entrance interchange on the toll road, the passage time is in the discount time zone, and the entrance interchange is in the discount section. The discount condition is searched. Calculate the estimated passing time of each interchange ahead of the entrance interchange, and the estimated passing time is within the discount time zone. Branch that search means interchange searches the discount condition in the discount section, the interchange in front of the entrance interchange that is expected to have been the discount condition is satisfied or met searched the search means in front of the junction specifying means for specifying for each direction, the guide for guiding the driver of the vehicle said that the discount is applied to the interchange in front of the entrance interchange which is specific in the specifying unit for every direction in which the branch Means.
According to the present invention, if there is an interchange that meets or is expected to meet the discount condition, the driver is informed that the discount is applied up to or from the interchange, so that the driver knows that the discount is available. Can do. Further, in the present invention, the interchange that is expected to meet or satisfy the discount condition is specified on the basis of the passage time passing through the interchange or the expected passage time passing through the interchange, so the driver does not need to set a destination. . Thus, according to the present invention, the driver can know that a discount can be obtained without setting a destination.
If you ride on a toll road from a certain discount section during the discount time zone on a toll road where the fare is discounted when you get on the discount period or get off the discount section at the discount time zone Can know that you can get a discount without setting a destination.
Also, on toll roads where the fare is discounted when you get on the discounted time zone from the specified discount zone or get off the discount zone at the discounted time zone, you got on the toll road at the discounted time zone but did not get on the discounted zone In this case, or when the user gets on a toll road from a discount section but does not get in the discount time zone, the driver can know that the driver can receive a discount without setting a destination.
Furthermore, by providing guidance for each branched direction, the driver can know that a discount can be received regardless of which direction the driver is heading.

(2) The guide unit may guide an interchange located farthest in the traveling direction of the vehicle among the interchanges ahead of the entrance interchange specified by the specifying unit.
According to the present invention, it is possible to know up to which interchange the discount can be received.

(3) When the entrance interchange is not in the discount section , the guide means includes a start interchange of the discount section closest to the vehicle traveling direction among the interchanges specified by the specifying means ahead of the entrance interchange. To the driver of the vehicle that the discount is applied.
According to the present invention, it is possible to know where the discount can be received from.

( 4 ) The toll road is a toll road in which a longest travel distance to which a discount is applied is defined, and the discount condition may further include the longest travel distance as a condition.

( 5 ) The search unit may include a traffic jam information acquisition unit that acquires traffic jam information, and may calculate the expected passage time in consideration of the traffic jam information acquired by the traffic jam information acquisition unit.
According to the present invention, the estimated passage time is calculated in consideration of traffic jams, so that it is possible to more accurately identify the interchange based on the estimated passage time. Therefore, it can guide more accurately that the discount is applied.

( 6 ) The guide means that the discount is applied before a predetermined distance of the nearest junction or a predetermined time before the discount time zone included in the discount condition searched by the search means. The driver may be guided.

( 7 ) The guide means may further guide the start time of the discount time zone included in the discount condition searched by the search means, or the time until the start time.
According to the present invention, the driver can know when the discount is available.

( 8 ) A navigation method for achieving the above-mentioned object is a discount on tolls on toll roads in which the toll is discounted when riding from a predetermined discount section in the discount time zone or getting off from the discount section in the discount time zone Navigation using a navigation device comprising storage means for storing discount conditions to be satisfied in order to be applied, and at least discount conditions including the discount interval to which the discount is applied and the discount time zone as conditions A method for searching for the discount condition on the toll road where the vehicle has passed through the entrance interchange on the toll road in the discount time zone and the entrance interchange is in the discount section. If there is no applicable discount condition, each interchange chain ahead of the entrance interchange Calculates the passage predicted time of the search steps interchange the passage predicted time is in the discount time zone to search for the discount condition in the discount period, the discount condition is satisfied or met found by the search step a specific step of identifying each direction for branching interchange is in front of the entrance interchange expected in front of the junction, said to interchange in front of the entrance interchange which is specific in the particular stage discount applies to a And a guidance step for guiding the driver of the vehicle for each branching direction .
According to the present invention, the driver can know that a discount can be obtained without setting a destination.

( 9 ) The navigation program for achieving the above object is a discount on a toll road traveling fee that allows the traveling fee to be discounted when the user enters a discounted time zone from a predetermined discounted section or gets off the discounted section in the discounted time zone. A computer having storage means for storing discount conditions to be satisfied in order to be applied, and including at least the discount interval to which the discount is applied and the discount time zone as a condition In the above, the discount condition in which the passing time when the vehicle has passed through the entrance interchange on the toll road is in the discount time zone and the entrance interchange is in the discount section is searched, and there is no corresponding discount condition In this case, the estimated passage time of each interchange ahead of the entrance interchange is calculated, and the Search means interchange predicted time is in the discount time zone to search for the discount condition in the discount section, from the front the entrance interchange that is expected to have been the discount condition is satisfied or met searched the search means specifying means for specifying for each direction for branching is interchange in front of the junction, the said discount from specific to said inlet interchange to interchange in the front is applied by the specifying unit for every direction in which the branch It is made to function as a guide means for guiding the driver of the vehicle.
According to the present invention, the driver can know that a discount can be obtained without setting a destination.

  It should be noted that the order of each operation of the method described in the claims is not limited to the order of description as long as there is no technical obstruction factor, and may be executed in any order, or may be executed simultaneously. Also good. In addition, each function of the plurality of means provided in the present invention is realized by a hardware resource whose function is specified by the configuration itself, a hardware resource whose function is specified by a program, or a combination thereof. The functions of the plurality of means are not limited to those realized by hardware resources that are physically independent of each other. The present invention can also be specified as an invention of a recording medium on which a program is recorded.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a block diagram showing a hardware configuration of the navigation apparatus 10 according to one embodiment of the present invention. The navigation device 10 is mounted on a vehicle such as an automobile or a motorcycle. The navigation device 10 guides a recommended route to a destination point and a travel point of the own vehicle.

The interface 22 includes an AD converter, a DA converter, and the like, and converts a signal form between the CPU 20 and each block in the navigation apparatus 10 and a communication signal form with the information center 24 via the communication unit 23. Do.
The hard disk device (HDD) 18 stores a map database (map DB) and the like. The map DB is a database composed of information that digitally represents a map, and is used for detecting the current position of the vehicle on the road network, searching for a route, and the like. In the map DB, intersections, junctions, turning points, dead ends, interchanges on toll roads (hereinafter referred to as “IC”) and the like are nodes, and roads are defined as links that connect nodes. For each link, traffic direction, distance, number of lanes, road type (general road, toll road, automobile road, mountain road, etc.), link ID, starting and ending nodes, right turn lane, left turn lane, etc. Information is defined as attribute information.

The vehicle speed sensor 15 is a sensor used for calculation of a speedometer and the own vehicle position. The vehicle speed sensor 15 can be composed of a vehicle speed sensor using wheel rotation speed, a Doppler ground vehicle speed sensor using radio waves or ultrasonic waves, a ground vehicle speed sensor using light and a spatial filter, and the like.
The direction sensor 16 includes a geomagnetic sensor, a left and right wheel speed difference sensor, a vibration gyro, a gas rate gyro, and an optical fiber gyro used for dead reckoning navigation.

The GPS unit 14 receives orbit data transmitted from three or four satellites used for satellite navigation, and outputs an latitude / longitude data of the current location of the vehicle, an ASIC (Application Specific Integrated Circuit), etc. Consists of.
The communication unit 23 receives various types of traffic information such as traffic jam information near the current position and traffic regulation information transmitted to each vehicle by FM multiplex broadcasting, optical beacons, infrared beacons, and the like from the information center 24. The received traffic information is stored in the RAM 19, flash memory 21 or HDD 18 by the CPU 20.

  The ETC (automatic toll collection system) unit 12 includes an antenna and an ASIC for communicating with a communication device provided at an entrance toll gate on a toll road. The ETC unit 12 acquires billing amount information corresponding to the travel section of the toll road from a communication device provided at the entrance / exit toll gate of the toll road, and subtracts the billing amount from the prepaid information. By detecting the communication between the ETC unit 12 and the entrance / exit toll gate on the toll road, it is possible to detect that the vehicle has entered the toll road or got off the toll road.

The display 13 is configured by an FPD (Flat Panel Display), HUD (Head Up Display), or the like used for displaying operation guidance, a map, or a travel route guidance.
The speaker 17 as a guidance means is used for outputting guidance voices such as operations, travel routes, and discounts. The speaker 17 may be shared with the audio speaker or may be dedicated for navigation.

The RAM 19 is a volatile storage medium that temporarily stores data and programs processed by the CPU 20.
The flash memory 21 as a storage means is a nonvolatile storage medium such as an EEPROM storing a control program executed by the CPU 20 and discount conditions. The discount conditions may be stored in the HDD 18. The control program, discount conditions, map DB, and the like can be stored in the flash memory 21 or the HDD 18 by downloading from a predetermined server via a network or reading from a computer-readable storage medium such as a removable memory (not shown). it can.
CPU20 as a search means, an identification means, a guidance means, and traffic jam information acquisition means controls each part of the navigation apparatus 10 by running a control program.

Next, an example of a discount applied to a toll road travel fee will be described.
As discounts for toll roads, for example, discounts that apply only to vehicles equipped with ETC units, commuting discounts that apply to a predetermined discount time zone in areas other than metropolitan suburbs, There are known early morning and night discounts that are applied, and late night discounts that are applied not only to the section but also to a predetermined discount time zone at midnight. Here, commuting discount will be described as an example.

FIG. 3 is a schematic diagram for explaining the commuting discount. Commuting discounts can be obtained by taking a toll road from a discount zone other than the suburbs of a metropolitan area during the discount time zone of 6:00 to 9:00, or during the discount time zone of 17:00 to 20:00. When you get off the toll road from the discount zone during the time zone, the travel fee will be discounted for the amount of travel in the discount zone. In addition, commuting discounts have the following conditions.
(1) The longest travel distance of one time is limited to 100 km or less, and if it exceeds 100 km, no discount is applied over the entire traveled section.
(2) If a discount zone is entered before the discount time zone and the discount zone is passed after the discount time zone has passed, no discount will be applied.
(3) It is not applied more than once in one discount time zone. For example, 6:00 to 9:00 and 17:00 to 20:00 are each one discount time zone, and the discount is applied only once in each discount time zone.
The aforementioned flash memory 21 stores a discount condition that includes all the above-mentioned conditions as a discount condition corresponding to the commuting discount.

Next, various driving patterns and ICs that satisfy or are expected to satisfy the commuting discount conditions in these various driving patterns will be described.
FIG. 1 is an example of a traveling pattern in which the entrance IC 43 on the toll road is in the discount zone and the passage time after passing through the entrance IC 43 is in the discount time zone (17:00 to 20:00). In this case, since the entrance IC 43 is in the discount zone and the passage time when the entrance IC 43 passes is in the discount time zone, it is determined that the commuting discount is applied when the entrance IC 43 passes. In commuting discount, if you ride on a toll road during the discount time zone from the IC in the discount zone, even if you travel beyond the discount time zone, it is within the discount zone and the travel distance of the discount zone is within 100 km Discounts are applied up to the IC. In other words, in the case of the traveling pattern shown in FIG. 1, the front IC that satisfies the discount condition is specified when it passes through the entrance IC 43. For example, referring to FIG. 1, the ICs up to IC 47 in the A direction and up to IC 50 in the B direction are specified as the ICs that satisfy the discount condition.

  FIG. 4 is an example of a travel pattern in which the passage time passing through the entrance IC 61 is included in the discount time zone, but the entrance IC 61 is not in the discount section. In this case, among the ICs in the nearest discount zone of the host vehicle, the IC whose expected passage time is in the discount time zone is specified. For example, since IC63 to IC65 and IC68 to IC70 are in the most recent discount zone and the expected passage time is in the discount zone, they are expected to satisfy the commuting discount conditions at least for the discount zone and the discount zone. . ICs ahead of IC 66 and ICs ahead of IC 71 are excluded because the expected passage time is not in the discount time zone. Next, ICs that are expected to satisfy all the conditions included in the commuting discount are identified from among the ICs whose estimated passage time is in the discount time zone and in the most recent discount section. In the commuting discount, the travel distance of the discount section is up to 100 km. For this reason, it is expected that ICs whose travel distance from the starting point IC 62 is within 100 km satisfy the condition among the interchanges whose estimated passage time is in the discount time zone and in the latest discount zone. For example, ICs 63 to 65, IC 68, and IC 69 are expected to satisfy the condition because the distance from the starting point IC 62 is within 100 km. Since IC70 exceeds 100 km, it is excluded.

  FIG. 5 is an example of a travel pattern in which the passage time when the entrance IC 82 passes through the entrance IC 82 is not included in the discount time zone, although the entrance IC 82 is in the discount section. The specific method in this case is substantially the same as the traveling pattern described in FIG. First, the discount time zone closest to the current time (hereinafter referred to as “the latest discount time zone”) is first identified, and among the ICs in the discount zone, the IC whose expected transit time is in the latest discount time zone. Is identified. For example, since IC84 to IC86 and IC89 to IC91 are in the discount zone and the expected passage time is in the latest discount time zone, they are expected to satisfy the commuting discount conditions at least for the discount time zone and the discount zone. . ICs ahead of IC87 and ICs ahead of IC92 are excluded. Next, it is expected that ICs that are within the discount zone and have a travel distance within 100 km from the entrance IC 82 satisfy the condition among the ICs that are in the discount zone and the estimated passing time is the latest discount time zone. For example, ICs 84 to 86, IC 89, and IC 90 are expected to satisfy the condition because the distance from the entrance IC 82 is within 100 km. Since IC91 exceeds 100 km, it is excluded.

Next, processing for guiding an IC to which a discount is applied will be described.
FIG. 6 is a flowchart showing a flow of processing for guiding an IC to which a discount is applied. This processing is executed at a predetermined time interval on the toll road, when passing the IC while traveling on the toll road, or on the toll road. In the following, the case of getting on a toll road will be described as an example.

In S105, the CPU 20 determines whether or not the own vehicle is on a toll road. Specifically, for example, when the CPU 20 detects communication between the ETC unit 12 and the entrance toll gate of the toll road, it determines that the user has boarded the toll road.
In S110, the CPU 20 stores the entrance IC in the RAM 19. The stored entrance IC is used as a starting point for charge calculation. In addition, when the entrance IC is the starting point when determining whether the travel distance of the discount section is within 100 km, this entrance IC is used.

In S115, the CPU 20 reads the discount condition from the flash memory 21 or the HDD 18.
In S120, the CPU 20 searches for a discount condition in which the entrance IC passage time after passing through the entrance IC is in the discount time zone. The CPU 20 proceeds to S125 when the applicable discount condition is searched, and proceeds to S140 when it is not found.

In S125, the CPU 20 searches for a discount condition in which the entrance IC is in the discount section among the discount conditions in which the entrance IC passage time is in the discount time zone. The CPU 20 executes the first process (S130) when the applicable discount condition is searched, and executes the second process (S135) when there is no search.
In S140, the CPU 20 searches for a discount condition in which the entrance IC is in the discount zone. If the applicable discount condition is found, the third process (S145) is executed, and if not, the process ends.

Next, the first, second, and third processes will be described. Here, a case where the above-described commuting discount is searched as a discount condition will be described as an example. However, here, for ease of understanding, it is assumed that there is no condition that a discount is not applied more than once in one discount time zone.
FIG. 7 is a flowchart showing the flow of the first process. The first process is a process corresponding to the travel pattern shown in FIG.
In S205, the CPU 20 performs correction by map matching using the map DB, while the latitude / longitude data of the current position of the vehicle input from the GPS unit 14, the traveling speed input from the vehicle speed sensor 15, and the direction sensor 16 are corrected. The current position of the own vehicle on the road network is detected based on the traveling direction input from. Next, the CPU 20 refers to the map DB, identifies the nearest junction JCT ahead of the current position, and determines the distance from the current position to the nearest junction JCT. The CPU 20 proceeds to S210 when the distance to the nearest junction JCT is 2 km or less, and proceeds to S220 if it is not within 2 km.

In S210, the CPU 20 refers to the map DB, and for each direction branched at the latest junction JCT, all conditions included in the commuting discount are ICs that are within the discount zone and within a distance of 100 km from the entrance IC. It is specified as an IC that satisfies the above.
In S215, the CPU 20 provides voice guidance to the farthest IC among the ICs identified in S210 for each direction. Specifically, for example, the CPU 20 provides voice guidance to the driver as shown in FIG. 1 as “discount is applied to A direction and IC 47. Discount is applied to B direction and IC 50”. Thereby, the driver can know the farthest IC to which the discount is applied even if the destination is not set. Further, since the CPU 20 guides the farthest IC in each branched direction, the driver can know the farthest IC to which the discount is applied regardless of which direction the driver is heading. The guidance is not limited to voice guidance, and guidance may be provided by displaying on the LCD.

In S220, the CPU 20 determines whether the toll road has been exited. If not, the process returns to S205 and repeats the process. If it gets off, the process is terminated.
Here, the guidance timing is determined based on the junction, but the guidance timing can be selected as appropriate. For example, guidance may be performed when entering the entrance IC.

FIG. 8 is a flowchart showing the flow of the second process. The second process is a process corresponding to the traveling pattern shown in FIG.
In S305, the CPU 20 specifies the most recent discount section among the discount sections in the traveling direction. However, since the traveling toll road may be branched at a forward junction, the CPU 20 specifies the nearest discount zone for each direction when branching forward.

In S310, the CPU 20 determines the distance from the own vehicle to the start point IC of the latest discount section specified in S305 at a predetermined time interval, and proceeds to S315 when the distance to the start point IC becomes 15 km or less.
In S315, CPU20 searches the traffic information received by the communication part 23, and acquires the traffic congestion condition from the own vehicle position to the end point IC of the nearest discount area.

  In S320, the CPU 20 calculates an estimated passing time in consideration of a traffic jam condition for each IC in front within the nearest discount zone and within 100 km from the starting point IC. Specifically, the CPU 20 determines the traffic jam section in the traveling direction based on the vehicle position and the traffic jam information received by the communication unit 23. Next, the CPU 20 obtains the distance to each IC from the map DB, calculates the required time at the standard speed at the time of the traffic jam for the traffic jam section, and the standard when there is no traffic jam for the traffic jam section. Calculate the required time at a reasonable speed. By calculating the estimated passage time in consideration of the traffic jam situation, the IC can be more accurately identified when the IC is identified based on the estimated passage time. Therefore, the driver can be guided more accurately to the IC to which the discount is applied.

  In S325, the CPU 20 specifies an IC whose estimated passage time is included in the discount time zone as an IC that is expected to satisfy the commuting discount.

In S330, the CPU 20 provides voice guidance to the starting point IC and the IC located farthest from each of the ICs specified in S325. For example, voice guidance is given to the driver as shown in FIG. 4 "Discount is applied from IC62 15km ahead. Discount is applied to A and IC65. Discount is applied to B and IC69." As a result, the driver can know that the discount is applied to IC65 and IC69, and can also know where the IC starts the discount.
Note that the discount condition is that even if you get on the toll road from the entrance IC 61 outside the discount section, if the passing time passing through the starting point IC 62 is in the discount time zone, it is within the discount section and the travel distance within the discount section is within 100 km The discount may be applied to the IC even if the discount time zone is exceeded. In this case, the discount is applied to IC66 in the A direction. Since there are various discount conditions, up to which IC the discount is applied may be determined according to the discount conditions.

FIG. 9 is a flowchart showing the flow of the third process. The third process is a process corresponding to the travel pattern shown in FIG.
In S405, the CPU 20 specifies the latest discount time zone.
In S410, the CPU 20 determines the difference between the current time and the start time of the most recent discount time zone specified in S405 at a predetermined time interval, and proceeds to S415 when the time to the start time is within 15 minutes.

In S415, CPU20 searches the traffic information received by the communication part 23, and acquires the traffic congestion condition from the own vehicle position to the end point IC of a discount area.
In S420, the CPU 20 calculates a predicted passing time in consideration of a traffic jam situation for each IC in front within the discount zone and within 100 km from the entrance IC.
In S425, the CPU 20 identifies the IC included in the discount time zone with the latest estimated passage time as the IC expected to satisfy the commuting discount.

  In S430, the CPU 20 provides voice guidance of the farthest IC among the ICs specified in S425, the start time of the discount time zone, and the time until the start time. Specifically, for example, as shown in FIG. 5, a discount is applied to A and IC86 from 17:00 after 15 minutes. A discount is applied to B and IC90. To do. As a result, the driver can know that the discount is applied to IC86 and IC90, and can also know when the discount starts.

  According to the navigation device 10 of the present invention described above, since the IC that is farthest in the traveling direction among the ICs that satisfy or are expected to satisfy the discount condition is guided, the driver can receive a discount to the guided IC. I can know that. Further, in the present invention, an IC that satisfies or is expected to satisfy the discount condition is specified based on the passage time passing through the IC or the expected passage time passing through the IC, so the driver does not need to set a destination. . Thus, according to the present invention, the driver can know that a discount can be obtained without setting a destination.

  In this embodiment, the discount condition including the discount time zone and the discount section is described as an example. However, the discount condition may be any discount condition as long as it includes at least the discount time zone. For example, the discount section is not limited, and discount conditions apply to all traveled sections if you travel even a little during the discount period, or discount conditions that apply the discount for the distance traveled during the discount period. May be.

  In the present embodiment, only the commuter discount is described as an example of the discount condition, but there may be a plurality of types of discounts. When there are a plurality of types of discounts, there may be cases where the discount to be applied cannot be appropriately selected in the above-described process. In such a case, the process may be modified as appropriate according to the discount conditions.

  In addition, this invention is not limited to said embodiment, It can apply to various embodiment in the range which does not deviate from the summary.

The schematic diagram which shows an example of the running pattern which concerns on embodiment of this invention. The block diagram of the navigation apparatus which concerns on embodiment of this invention. The schematic diagram for demonstrating the discount conditions which concern on embodiment of this invention. The schematic diagram which shows an example of the running pattern which concerns on embodiment of this invention. The schematic diagram which shows an example of the running pattern which concerns on embodiment of this invention. The flowchart which concerns on embodiment of this invention. The flowchart which concerns on embodiment of this invention. The flowchart which concerns on embodiment of this invention. The flowchart which concerns on embodiment of this invention.

Explanation of symbols

10 navigation device, 17 speaker (guidance means), 21 flash memory (storage means), 20 CPU (search means, identification means, guidance means, traffic jam information acquisition means)

Claims (9)

It is a discount condition that must be satisfied in order to apply a discount to the toll road fare where the fare is discounted when riding from the predetermined discount section in the discount time zone or getting off from the discount section in the discount time zone, Storage means for storing a discount condition including at least the discount section to which the discount is applied and the discount time zone as a condition;
On the toll road, the discount condition in which the passing time when the vehicle has passed through the entrance interchange on the toll road is in the discount time zone and the entrance interchange is in the discount section is searched, and the corresponding discount condition If there is no search means to calculate the expected passage time of each interchange ahead of the entrance interchange, the search means for searching for the discount condition in which the expected passage time is in the discount time zone is in the discount section ,
Identifying means for identifying the interchange ahead of the entrance interchange that is expected to meet or satisfy the discount condition retrieved by the retrieval means for each direction that branches at a forward junction ;
And guide means for guiding the driver of the vehicle for each direction of the branch that the discount from the specific to said inlet interchange to interchange in the front is applied by the specifying unit,
A navigation device comprising: The navigation device according to claim 1, wherein the guide means guides an interchange located farthest in the traveling direction of the vehicle among the interchanges ahead of the entrance interchange specified by the specifying means. The guide means that, when the entrance interchange is not in the discount section, the discount is applied from the start point interchange of the discount section closest to the vehicle traveling direction among the interchanges ahead of the entrance interchange. The navigation device according to claim 1, wherein the navigation device guides a driver of the vehicle. The toll road is a toll road in which the longest mileage to which a discount is applied is defined,
The navigation device according to any one of claims 1 to 3 , wherein the discount condition further includes the longest travel distance as a condition. The searching means includes a congestion information acquisition means for acquiring traffic congestion information, any one of claim 1 to 4 for calculating the passage predicted time by adding the acquired congestion information in the congestion information obtaining means The navigation device described. The guide means informs the driver that the discount is applied before a predetermined distance before the nearest junction or a predetermined time before the discount time zone included in the discount condition searched by the search means. The navigation device according to any one of claims 1 to 5 , which guides the user. It said guiding means, the start time of the discount time zone included in the retrieved terms of discount in the searching means, or according to any one of claims 1 to 6, further guiding the time until the start time Navigation device. It is a discount condition that must be satisfied in order to apply a discount to the toll road fare where the fare is discounted when riding from the predetermined discount section in the discount time zone or getting off from the discount section in the discount time zone, A navigation method using a navigation device comprising storage means for storing a discount condition including at least the discount section to which the discount is applied and the discount time zone as a condition,
On the toll road, the discount condition in which the passing time when the vehicle has passed through the entrance interchange on the toll road is in the discount time zone and the entrance interchange is in the discount section is searched, and the corresponding discount condition If there is not, calculating a predicted passing time of each interchange ahead of the entrance interchange, and searching for the discount condition in which the expected passing time is in the discount time zone and the discount condition in the discount section ,
A specifying step of specifying for each direction branching at a forward junction an interchange ahead of the entrance interchange that is expected to meet or satisfy the discount condition searched in the search step;
A guide step of guiding the driver of the vehicle that the discount to the interchange in front of the entrance interchange which is specific in the particular stage is applied to each direction of the branch,
Navigation method including. It is a discount condition that must be satisfied in order to apply a discount to the toll road fare where the fare is discounted when riding from the predetermined discount section in the discount time zone or getting off from the discount section in the discount time zone, A computer having storage means for storing a discount condition including at least the discount section to which the discount is applied and the discount time zone as a condition;
On the toll road, the discount condition in which the passing time when the vehicle has passed through the entrance interchange on the toll road is in the discount time zone and the entrance interchange is in the discount section is searched, and the corresponding discount condition If there is no search means to calculate the expected passage time of each interchange ahead of the entrance interchange, the search means for searching for the discount condition in which the expected passage time is in the discount time zone is in the discount section ,
Identifying means for identifying the interchange ahead of the entrance interchange that is expected to meet or satisfy the discount condition retrieved by the retrieval means for each direction that branches at a forward junction ;
Navigation program to function as a guide means for guiding the driver of the vehicle said that the discount is applied to the interchange in front of the entrance interchange which is specific in the specifying unit for every direction of the branch.

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