JP4576955B2 - Navigation system - Google Patents

Description

  The present invention relates to a navigation system.

  Conventionally, in a navigation device mounted on a vehicle such as an automobile, an optimum route from a set departure point to a destination is searched based on road map data and displayed on a display means. . In this case, the route is searched so that the distance from the departure point to the destination is the shortest, or the route is searched so that the required time is the shortest. Based on the set vehicle speed for each road segment, calculate the estimated time to arrive at the destination, that is, the estimated required time, or use the estimated required time for each road segment included in the traffic information Thus, a technique for calculating the estimated time required to arrive at the destination has been proposed (see, for example, Patent Document 1).

The calculated estimated time required to arrive at the destination is displayed on the display means, and guidance is provided to the operator of the navigation device.
JP-A-8-287393

  However, in the above-mentioned conventional navigation device, there is no information about the time required for the displayed predicted required time to arrive at the destination in normal traffic conditions, that is, the length of the information compared with the normal required time. Not provided to. For this reason, the operator cannot determine whether the displayed predicted required time is longer or shorter than the normal required time. For example, the route to a destination that is always congested is the same as it is today, so it will take as much time as usual, or the route to a destination that is always free is congested today I couldn't judge that it took more time than usual.

  The present invention solves the conventional problem and changes the display form of the estimated required time based on the result of comparing the estimated required time to the destination with the normal required time, thereby the predicted required time. It is an object of the present invention to provide a navigation system that allows an operator to easily recognize whether a road is longer or shorter than a normal required time and grasp a road condition.

Therefore, in the navigation system of the present invention, a route search unit that searches for a route to the set destination , and a route line that indicates the searched route and a predicted required time to the destination are displayed on the display unit. A display control unit for causing the current traffic information and / or past traffic information for each link to be acquired, and the current traffic information and / or past traffic information. based on a total and predicted traffic information creation unit for creating predictive traffic information of each link, based on the predicted traffic information, and calculates a predicted link travel time for each link on the route, the predicted link travel time a predicted required time calculator for calculating predicted required time to the destination by, based on the past traffic information, each link on the path Calculates a statistical value of the link travel time with statistical link travel time, the statistical value creating unit for calculating a normal required time to the destination by aggregated the statistical link travel time, the predicted required time The display control unit further includes a required time comparison unit that compares the predicted link travel time with the statistical link travel time for each link on the route as well as the normal required time. The predicted travel time is displayed in a display form according to the comparison result with the normal travel time, and each section on the route line is displayed as a predicted link travel time and a statistical link travel time for a link corresponding to the section. Ru is displayed in display form corresponding to the comparison result of.

  According to the present invention, in the navigation system, the display form of the predicted required time is changed based on the result of comparing the predicted required time to the destination with the normal required time. Therefore, the operator can easily recognize whether the predicted required time is longer or shorter than the normal required time, and can grasp the road condition.

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

  FIG. 1 is a diagram showing a display screen of the navigation device according to the first embodiment of the present invention.

  In the figure, 11 is a display screen of a display unit of a navigation system (not shown) in the present embodiment. The navigation system is, for example, a navigation device mounted on a vehicle such as a passenger car, a truck, a bus, or a motorcycle, but may be any device that includes a display unit that can display a display screen 11 as shown in the figure. , A personal computer, a PDA (Personal Digital Assistant), a portable information terminal, a mobile phone, a PHS (Personal Handy-Phone System) phone, a game machine, etc. Further, the navigation system may be composed of a plurality of devices instead of a single device. For example, the navigation system includes a navigation device and an information providing server communicably connected to the navigation device, and executes navigation processing such as route search in response to a request transmitted from the navigation device by the information providing server. The result may be transmitted to the navigation device and displayed. The navigation system includes a personal computer and a web server connected to the personal computer via the Internet, and accesses a home page of the web server from the personal computer and performs navigation such as route search executed on the home page. It may be a system that acquires the processing result and displays it on the personal computer. In this embodiment, the navigation system is described as being a navigation device mounted on a vehicle having a function of executing navigation processing independently.

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

  The data recording unit stores map data including search data and the like. That is, the data recording unit includes a database composed of various data files, and displays a guide map along the searched route on the display screen 11 of the display unit in addition to search data for searching for a route. Or various data such as facility data is recorded in order to display other guidance information. Note that the data recording unit also includes information on links, which are units constituting a road. The data recording unit also records various data for outputting predetermined information by the audio output unit.

  The input unit is for correcting a position at the start of traveling or inputting a destination, such as an operation key, a push button, a jog dial, a cross key, etc. arranged in the navigation device body. However, it may be a remote controller. When the display unit is a touch panel, it is desirable that the display unit includes operation switches such as operation keys and operation menus displayed on the display screen 11 of the display unit. In this case, input can be performed by touching the operation switch like a normal touch panel, that is, by touching.

  The display screen 11 of the display unit displays operation guidance, operation menus, operation key guidance, a route from the current position to the destination, guidance information along the route, and the like. As the display unit, a CRT, a liquid crystal display, an LED (Light Emitting Diode) display, a plasma display, a hologram device that projects a hologram on a windshield, or the like can be used. Here, the display unit is a touch panel that also functions as an input unit, and input can be performed by touching operation switches such as operation keys and operation menus displayed on the display screen 11 of the display unit. It will be explained as a thing.

  In the present embodiment, from the viewpoint of function, the navigation device searches for a route from the input departure point to the destination, the position of the traffic jam section, the length of the traffic jam section, the vehicle speed of the traffic jam section, the traffic jam A traffic information acquisition unit that acquires traffic information including traffic congestion information such as the degree of traffic congestion of a section, a predicted traffic information generation unit that generates predicted traffic information based on the traffic information, and arrives at the destination based on the predicted traffic information The estimated required time calculation unit that calculates the estimated required time, which is the time that is predicted to be required, and the required time comparison that determines whether the calculated predicted required time is longer or shorter than the normal required time And a display control unit for controlling the operation of the display unit and displaying the map and the estimated required time.

  Here, the route search unit searches for a route from the departure point to the destination as in a normal navigation device. Normally, the current location of the vehicle is automatically input as the departure location, but the operator can input an arbitrary location as the departure location. Then, the route search unit accesses a database stored in the data recording unit to search for a route so that the distance from the departure point to the destination is the shortest, or a route so that the required time is the shortest However, the route may be searched with reference to the traffic information acquired by the traffic information acquisition unit. When the route is set as a guidance target, that is, as a guidance route, the guidance route or guidance information along the guidance route is displayed on the display screen 11 of the display unit, or an audio output unit. The route guidance is performed by outputting the guidance information by voice.

  The traffic information acquisition unit acquires current traffic information and past traffic information. For example, VICS (R) information, which is traffic information provided by VICS (R) (Vehicle Information & Communication System), traffic information provided by other traffic information providing centers, probes such as probe cars, etc. Traffic information such as traffic information provided by the means can be acquired. Note that the traffic information is preferably acquired in association with a VICS (R) link or a road link. Here, the road link is a unit constituting a road, and is usually divided with an intersection of three or more roads as a boundary. And in a normal navigation apparatus, road link ID as an identification number which identifies a road link is provided.

  Further, the predicted traffic information creating unit creates predicted traffic information used for calculating the required time for prediction. In this case, the predicted traffic information creation unit creates the predicted traffic information based on the current traffic information, but can also create the predicted traffic information based on the current traffic information and the past traffic information.

  The predicted travel time calculation unit is necessary for arriving at the destination when traveling along the route searched by the route search unit based on the predicted traffic information created by the predicted traffic information creation unit. An estimated required time, which is a predicted time, is calculated. That is, using the degree of congestion, link travel time, vehicle speed, etc. for each link included in the predicted traffic information, the predicted link travel time for each link is calculated, and the predicted link travel time is summed up to calculate the required travel time. Is calculated. Further, the required time comparing unit compares the predicted required time calculated by the predicted required time calculating unit with a normal required time.

  Here, the normal required time is a statistical value of the required time when traveling on the same route in the past, and is, for example, an arithmetic average value, a median (median value), or the like. In this case, the navigation device transmits traffic information such as VICS (R) information acquired by the traffic information acquisition unit to the data recording unit. The data recording unit includes a traffic information database that accumulates the traffic information received from the traffic information acquisition unit.

  Further, the navigation device has a statistical value creating unit as statistical value creating means. The statistical value creation unit can perform statistical processing of traffic information such as VICS (R) information accumulated in the traffic information database to create a statistical value. For example, a statistical travel time is created as a statistical value from the link travel time for each link included in the accumulated past traffic information, and a statistical value of the required time for traveling the route from the departure point to the destination is obtained. create. In the present embodiment, the statistical value is a value obtained by performing statistical processing while excluding abnormal values. For example, when creating a statistical travel time, the vehicle speed corresponds to 200 [km / h]. Link travel time is excluded as an abnormal value.

  In this case, it is desirable that the information such as the link travel time and the vehicle speed is stored together with a factor that changes the information, that is, a change factor. The factors include time factors, calendar factors, weather factors, and the like. The time factor is, for example, a narrow time zone of about 15 minutes, a wide time zone of about 1 hour, a broader time zone such as morning, noon, evening, night, midnight, etc. Even if the time zone is different, the link travel time, the vehicle speed, etc. change. In addition, the calendar factors include day of the week, date, season, etc. Even for the same link, the link travel time, vehicle speed, etc. change between weekends and days of the week. Link travel time, vehicle speed, etc. will also change from the usual days of holidays, Bon holidays, New Year holidays, and summer holidays. Furthermore, the weather factors are, for example, fine weather, rain, snow, etc. Even if the link is the same, in the case of rain, snow, etc., the link travel time, vehicle speed, etc. change compared to the case of fine weather. To do. And it is desirable to use the statistical travel time corresponding to the same factor as the case where the predicted required time is calculated as the normal required time as a comparison target. For example, if the time point for calculating the estimated required time belongs to the morning time zone, the statistical travel time calculated using the link travel time included in the traffic information acquired in the morning time zone is used. To do.

  To explain with a specific example, when calculating the statistical value of the link travel time of a certain road link A on Monday at 8:00, the road link A over one month of July of a certain year. Get the link travel time. In this case, the link travel time on July 1 (Monday) is 100 seconds, the link travel time on July 8 (Monday) is 130 seconds, and the link travel time on July 15 (Monday) is 105 seconds. Assuming that the link travel time on Monday, July 22 is 120 seconds, the arithmetic average is calculated to be 114 seconds. Therefore, the normal link travel time of road link A at 8:00 on Monday can be 114 seconds.

  The navigation device can also obtain a normal required time as a statistical value of the required time by using a travel history acquired when the vehicle actually traveled on the same route in the past. That is, the travel history can be included in the traffic information acquired by the traffic information acquisition unit. In this case, the navigation device includes a travel history acquisition unit as a travel history acquisition unit. The travel history acquisition unit acquires travel history information including information such as a vehicle speed acquired from a speedometer, a vehicle speed sensor, etc., vehicle position information detected by the current position detection processing unit, a travel locus, and the like. To the department. The travel history information is acquired in association with a link of a road on which the vehicle has traveled. The data recording unit includes a travel history information database that accumulates the travel history information received from the travel history acquisition unit.

  The statistical value creating unit creates a statistical value by performing statistical processing on the travel history information accumulated in the travel history information database. For example, a statistical travel time is created as a statistical value from the link travel time for each link actually traveled by the vehicle included in the travel history information, and the time required for traveling the route from the departure point to the destination is calculated. Create a value. The statistical value creating unit creates statistical values by performing statistical processing on the accumulated travel history information at a timing such as once a day or once a week when the vehicle is stopped. A statistical value may be created by performing statistical processing on travel history information sequentially acquired while the vehicle is traveling.

  Also in this case, as in the case of the traffic information described above, it is desirable that the travel history information such as the link travel time is stored together with a change factor as a factor that changes the travel history information. For example, if the time point for calculating the estimated required time belongs to the morning time zone, the statistical travel time calculated using the link travel time included in the travel history information acquired in the morning time zone is used. Use it.

  Then, as shown in FIG. 1A, the display control unit displays a route to the searched destination on the display screen 11 of the display unit, and also displays a predicted required time display field indicating the predicted required time. 15 is displayed on the display screen 11 of the display unit. In FIG. 1A, reference numeral 12 denotes a current position mark indicating the current position of the vehicle on the map, and the direction of the arrow in the current position mark 12 indicates the traveling direction of the vehicle. Reference numeral 13 denotes a destination mark indicating a destination set on the map, and reference numeral 14 denotes a route line indicating a route searched by the route search unit on the map. FIG. 1A shows a case where the predicted required time calculated by the predicted required time calculation unit is the same as the normal required time.

  When the estimated required time is shorter than the normal required time, the display control unit displays a display screen 11 as shown in FIG. In this case, the display form of the predicted required time display field 15 is different from the case where the predicted required time is the same as the normal required time, and the display form of the frame of the predicted required time display field 15 is changed. The display form of the predicted required time display field 15 may be changed in any way, and the color, pattern, line thickness, line type, etc. of the predicted required time display field 15 can be changed. . Further, the background of the estimated required time display field 15, that is, the color, pattern, etc. in the frame may be changed, or the font, color, etc. of the displayed character may be changed.

  In this case, it is desirable that the display form of the predicted required time display column 15 is changed to a form that allows the operator to sensuously understand that the predicted required time is shorter than the normal required time. It is desirable to change the color of the frame, the color in the frame, the color of the character, etc. of the estimated required time display field 15 to a color that generally indicates safety, security, etc., such as blue and green. Furthermore, the display form of the estimated required time display column 15 is gradually changed according to the magnitude of the difference between the estimated required time and the normal required time, that is, according to the extent that the estimated required time is shorter than the normal required time. It can also be made. For example, as the predicted required time becomes shorter, the predicted required time display field 15 can be changed to a darker color. Thereby, the operator can determine how much the route to the destination is free.

  If the estimated required time is longer than the normal required time, the estimated required time display field 15 is displayed as shown in FIG. Also in this case, the display form of the estimated required time display field 15 may be changed in any way, and the color, pattern, line thickness, line type, etc. of the estimated required time display field 15 are changed. Can do. Further, the background of the estimated required time display field 15, that is, the color, pattern, etc. in the frame may be changed, or the font, color, etc. of the displayed character may be changed. The predicted required time display field 15 when the predicted required time is longer than the normal required time is displayed in a display form different from the predicted required time display field 15 when the predicted required time is shorter than the normal required time. Can be identified.

  In this case, it is desirable that the display form of the predicted required time display field 15 is changed to a form that allows the operator to sensuously understand that the predicted required time is longer than the normal required time. It is desirable to change the color of the frame in the estimated required time display field 15, the color in the frame, the color of the character, etc. to a color that generally indicates caution, danger, etc., such as red, yellow. Further, the display form of the predicted required time display column 15 is gradually changed according to the magnitude of the difference between the predicted required time and the normal required time, that is, according to the extent that the predicted required time is longer than the normal required time. It can also be made. For example, as the estimated required time becomes longer, the color of the predicted required time display column 15 can be changed to a darker color. Accordingly, the operator can determine how congested the route to the destination is.

  In this way, the operator can grasp the estimated required time to the destination only by visually recognizing the predicted required time display column 15 displayed on the display screen 11, and the estimated required time is a normal required time. It can be easily recognized whether it is longer or shorter than the time. Therefore, the operator can grasp the road condition of the route to the destination, that is, the degree of congestion instantaneously and accurately.

  Next, the operation of the navigation device having the above configuration will be described. Here, an operation for determining the display form of the estimated required time display field 15 will be described.

  FIG. 2 is a flowchart showing the operation of the navigation device according to the first embodiment of the present invention.

  First, the operator operates the input unit of the navigation device to set a destination. For example, a search condition for searching for a route such as highway priority can be set as necessary. Subsequently, the route search unit of the navigation device searches for a route from the current position to the destination based on the current position of the vehicle, the set destination, the search condition, and the like. In this case, for road sections where traffic information can be used, a route is searched using the traffic information. That is, a search cost is calculated using traffic information, and a route is searched for such a search cost as low as possible.

  Subsequently, the predicted required time calculation unit of the navigation device calculates today's required time for the searched route. That is, a predicted required time, which is a time predicted to be necessary to arrive at the destination when traveling along the route searched by the route search unit at the present time, is calculated. Then, the statistical value creation unit of the navigation device calculates the usual required time for the searched route. That is, when the vehicle travels along the searched route, a statistical value of the time required to arrive at the destination is created.

  Subsequently, the required time comparing unit compares the predicted required time calculated by the predicted required time calculating unit with the normal required time, and determines whether today is earlier or later than usual. That is, it is determined whether the estimated required time is shorter or longer than the normal required time. In this case, when comparing the predicted required time with the normal required time, a threshold value can be set. For example, if the difference obtained by subtracting the normal required time value from the predicted required time value is equal to or greater than the positive threshold value, it is determined that the predicted required time is longer than the normal required time, and the difference is equal to or less than the negative threshold value. If so, it can be set to determine that the estimated required time is shorter than the normal required time. Moreover, the said threshold value can be set arbitrarily, for example, can be 5 [%] of normal required time. If the threshold is not set, if the difference obtained by subtracting the normal required time value from the predicted required time value is positive, it is determined that the predicted required time is longer than the normal required time. If it is negative, it is determined that the estimated required time is shorter than the normal required time.

  When the predicted required time is shorter than the normal required time, the display control unit expresses the predicted required time in blue. That is, the display form of the predicted required time display column 15 is set to a display form that allows the operator to sensuously understand that the predicted required time is shorter than the normal required time. Therefore, the operator can instantly and accurately grasp that the road condition of the route to the destination is more vacant than usual.

  When the estimated required time is longer than the normal required time, the display control unit expresses the estimated required time in red. That is, the display form of the predicted required time display column 15 is set to a display form that allows the operator to sensuously understand that the predicted required time is longer than the normal required time. Therefore, the operator can instantly and accurately grasp that the road condition of the route to the destination is more crowded than usual.

  If the predicted required time is the same as the normal required time, the display control unit sets the display form of the predicted required time display field 15 to the normal one.

Next, a flowchart will be described.
Step S1: The current required time for the searched route is calculated.
Step S2: The usual required time for the searched route is calculated.
Step S3 It is determined whether today is earlier or later than usual. If today is earlier than usual, the process proceeds to step S4. If today is later than usual, the process proceeds to step S5.
Step S4 The estimated required time is expressed in blue.
Step S5 The estimated required time is expressed in red.

  Thus, in the present embodiment, the navigation device compares the estimated required time for arriving at the destination with the normal required time, and displays the predicted required time displayed on the display screen 11 based on the result. The display form of the column 15 is changed. Therefore, the operator can instantly and accurately grasp whether the road condition to the destination is more crowded or vacant by visually recognizing the estimated required time display column 15.

  This allows the operator to say, for example, that the route to a destination that is always busy is relatively free today, so it takes less time than usual, or that the route to a destination that is always free is today It can be easily determined that it takes more time than usual because it is crowded by chance. Therefore, the navigation device according to the present embodiment travels around the operator's home, for example, an area within a radius of 30 km from the home, when the operator travels on a daily commuting route, a school route, or the like. This is particularly effective when

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 3 is a diagram showing an example of a predicted required time display field of the navigation device according to the second embodiment of the present invention.

  In the present embodiment, the display control unit displays a predicted arrival time corresponding to a predicted required time that is a time predicted to be necessary to arrive at the destination. The predicted arrival time is a time predicted to arrive at the destination. In this case, the predicted arrival time may be displayed together with the predicted required time, or may be displayed instead of the predicted required time. That is, the display of the predicted time can be omitted. The predicted arrival time can be easily calculated from the predicted required time calculated by the predicted required time calculation unit and the current time.

  In FIG. 3, 16 is a predicted arrival time display field for displaying the predicted arrival time. In the examples shown in FIGS. 3A and 3B, the predicted arrival time display field 16 is displayed as an analog clock. 3A shows the predicted arrival time display column 16 when the predicted required time is shorter than the normal required time, and FIG. 3B shows the predicted arrival time display when the predicted required time is longer than the normal required time. Column 16 is shown.

  In the example shown in FIGS. 3C and 3D, the predicted arrival time display column 16 is displayed in the same manner as the predicted required time display column 15 in the first embodiment. 3C shows the predicted arrival time display field 16 when the predicted required time is shorter than the normal required time, and FIG. 3D shows the predicted arrival time display when the predicted required time is longer than the normal required time. Column 16 is shown.

  Then, the display form of the predicted arrival time display field 16 is changed based on the result of comparing the predicted required time with the normal required time in the same manner as the predicted required time display field 15 in the first embodiment. Is done. Therefore, the operator can instantly and accurately grasp whether the road condition to the destination is more crowded or vacant by visually recognizing the predicted arrival time display field 16.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st and 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Also, the description of the same operations and effects as those of the first and second embodiments is omitted.

  FIG. 4 is a diagram showing a display screen of the navigation device according to the third embodiment of the present invention.

  In the present embodiment, as shown in FIG. 4, the display control unit, based on the result of comparing the estimated required time in each section of the route to the destination with the normal required time in each corresponding section, The display form of the line 14 is changed.

  In this case, the section is, for example, a road link. The predicted travel time calculation unit calculates the predicted link travel time predicted to be necessary for passing through each link when traveling along the route searched by the route search unit in the predicted travel time in each section. Calculate as time. Further, the statistical value creating unit calculates the statistical value of the link travel time for each link as the normal required time in each section. Further, the required time comparison unit determines whether the predicted required time calculated for each of the sections is longer or shorter than the normal required time. Then, the display control unit changes the display form of the route line 14 for each of the sections.

  The display form of the route line 14 may be changed in any way, and the color, pattern, thickness, type, and the like of the line indicating the route line 14 can be changed. For example, the estimated required time display field 15 The display form can be changed in the same manner.

  Thus, in the present embodiment, the display form of each section of the route line 14 indicating the route to the destination is compared with the estimated required time in each section of the route with the normal required time in each section. Based on the result of the change. Therefore, the operator can grasp for each section whether the road condition to the destination is more crowded or vacant by visually recognizing the route line 14.

  In the first and second embodiments, the predicted traffic information is created based on the current traffic information, and the predicted required time is calculated based on the predicted traffic information. However, the statistical value of the traffic information may be stored together with the event factor. In this case, the navigation apparatus includes an event information acquisition unit that acquires event information and a normal required time calculation unit that calculates a normal required time. Event information such as government offices, police, Japan Road Traffic Information Center, event companies, and publishers, such as information on fireworks, marathons, festivals, highway concentrated work, etc. The predicted traffic information is created using the statistical value of the traffic information of the event factor corresponding to the event information without using the traffic information. A predicted required time is calculated using the generated predicted traffic information. Then, the normal required time is calculated using the statistical values of the factors of the day of the week and the time zone corresponding to the current date and time. Note that the normal required time can also be calculated in consideration of seasonal and monthly factors.

  The present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

It is a figure which shows the display screen of the navigation apparatus in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the navigation apparatus in the 1st Embodiment of this invention. It is a figure which shows the example of the estimated required time display column of the navigation apparatus in the 2nd Embodiment of this invention. It is a figure which shows the display screen of the navigation apparatus in the 3rd Embodiment of this invention.

Explanation of symbols

14 Route line

Claims (3)

A route search unit for searching for a route to the set destination ;
A display system that displays a predicted time to the destination on a display unit along with a route line indicating the searched route ,
A traffic information acquisition unit for acquiring current traffic information and / or past traffic information for each link ;
Before SL based on the current traffic information and / or historical traffic information, and the predicted traffic information creation unit for creating predictive traffic information of each link,
Based on the predicted traffic information, and calculates a predicted link travel time for each link on the route, the predicted required time calculator for by total the predicted link travel time to calculate the predicted required time to the destination ,
Based on the past traffic information, a statistical value of the link travel time for each link on the route is calculated as a statistical link travel time, and the statistical link travel time is totaled to obtain a normal required time to the destination A statistical value creation unit for calculating
With the previous SL predicted required time is compared with the normal time required for each link on the path, further comprising a, a required time comparison unit that compares the predicted link travel time and the statistical link travel time,
The display control unit displays the predicted required time in a display form corresponding to a result of comparison with the normal required time, and displays each section on the route line for a predicted link trip for a link corresponding to the section. A navigation system characterized in that it is displayed in a display form corresponding to a comparison result between time and statistical link travel time . Prior Symbol display control unit, a predicted arrival time to the destination corresponding to the predicted required time, according to claim 1 a display form corresponding to the difference between the normal required time and the predicted required time Navigation system. Further comprising an event information acquisition unit that acquires event information,
The predictive traffic information creating unit creates the predicted traffic information based on past traffic information corresponding to the acquired event information,
The navigation system according to claim 1, wherein the statistical value creation unit calculates the statistical link travel time based on past traffic information corresponding to the acquired event information .

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