JP4939296B2 - Display device, display method, display program, and recording medium - Google Patents

Description

  The present invention relates to a display device mounted on a moving body, a display method, a display program, and a recording medium. However, the use of the present invention is not limited to the above-described display device, display method, display program, and recording medium.

  In recent years, a moving body such as a vehicle is equipped with a display device such as a navigation device that displays the current position of the vehicle and a road based on map data. For example, when searching for a route to a destination, a route that passes through a so-called unopened level crossing may be set. In such a case, at a level crossing without opening, it takes time to pass through the level crossing, which may be significantly different from the searched scheduled time.

  Therefore, a technique has been proposed in which the opening / closing time for each time zone at each level crossing is stored in advance, and the route search is performed based on the stored data and taking into account the level crossing data corresponding to the time. (For example, see Patent Document 1 below.)

JP 2001-304877 A

  However, when the technique of Patent Document 1 described above is applied as a display device, for example, when the opening / closing times of adjacent railroad crossings are the same, one railroad crossing is a road crossing where the other railroad crossing is the same. However, even if it is a level crossing on a quiet road, a route taking into account only the opening and closing time of the level crossing is set, and therefore, the crossing of a congested road may be used for the route. That is, even if the opening and closing times are the same, there is a problem that an appropriate route cannot be set because only the opening and closing times are taken into consideration even though the traffic time is different and the passing time of the road is different.

  In order to solve the above-described problems and achieve the object, a display device according to claim 1 is based on recording means for recording map data, acquisition means for acquiring attribute information of a crossing, and the attribute information. Identifying a crossing that bypasses the traffic crossing (hereinafter referred to as a “detour crossing”) based on whether or not the crossing is a traffic crossing and based on the position of the traffic crossing determined from the crossing position on the map data Identifying means, display control means for controlling the traffic crossing and the detour crossing specified by the specifying means to display different symbols, respectively, and the symbol display of the traffic crossing controlled by the display control means And a display means for displaying a symbol display of the detour railroad crossing.

   According to a sixth aspect of the present invention, there is provided a display method for acquiring level crossing attribute information, and whether or not the level crossing is a traffic jam level crossing based on the level crossing attribute information acquired by the acquisition step. A step of identifying a crossing that bypasses the traffic crossing (hereinafter referred to as a “detour crossing”) based on the position of the traffic crossing determined from the crossing position on the map data; A display control step for controlling the traffic crossing and the detour crossing so as to display different symbols, and a display step for displaying the symbol display of the traffic crossing and the symbol display of the detour crossing controlled by the display control step; , Including.

  According to a seventh aspect of the present invention, a display program causes a computer to execute the display method according to the sixth aspect.

  A recording medium according to an eighth aspect of the invention is characterized in that the display program according to the seventh aspect is recorded in a computer-readable manner.

  Exemplary embodiments of a display device, a display method, a display program, and a recording medium according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Embodiment)
(Functional configuration of display device)
A functional configuration of the display device 100 according to the embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating an example of a functional configuration of the display device according to the embodiment. In FIG. 1, the display device 100 includes an acquisition unit 101, a specification unit 102, a display control unit 103, a display unit 104, a search unit 105, and a required time calculation unit 106.

  The acquisition unit 101 acquires crossing attribute information. The level crossing attribute information is information regarding the crossing time of the level crossing. Specifically, it may be information on the amount of traffic such as how much a vehicle passes per predetermined time at a railroad crossing. The attribute information includes, for example, information for each time zone recorded in advance, and real-time information received by wire or wireless.

  Based on the attribute information of the level crossing acquired by the acquisition unit 101, the specifying unit 102 determines whether the level crossing that is likely to cause a certain level of traffic congestion or the frequency of occurrence of a certain level of traffic congestion from the level crossing position on the map data. Identify high crossings (hereinafter referred to as “traffic crossings”). More than a certain amount of traffic is a traffic jam that exceeds a certain distance starting from the level crossing point, a traffic jam that has more than a certain number of vehicles, a traffic jam in which the number of vehicles waiting for the level crossing to open exceeds a certain number of times, The time required for passing the level crossing is a traffic jam of a certain time or more. That is, a level crossing that takes a long time to pass through a level crossing corresponds to a traffic jam crossing. The “constant” mentioned here does not have to be a constant value common to all level crossings, and may be a value set for each level crossing.

  The attribute information may be generated in advance as follows, for example. That is, if the number of vehicles that block traffic per certain time at a level crossing is compared with the threshold value for whether or not there is a traffic jam set for each level crossing, if the number is greater than the threshold, The attribute information may be generated. The number of traffic blocks is a value calculated based on, for example, an average value of traffic volume per fixed time and a level crossing opening / closing time per fixed time. Furthermore, the attribute information may be generated as information indicating whether a crossing is likely to cause a certain level of traffic congestion or a frequency crossing at which a certain level of traffic congestion occurs frequently. The fixed time may be a time set for each level crossing.

  Further, the specification of the traffic jam crossing may be specified in advance by the specifying unit 102 based on the traffic volume for each time zone at each level crossing, or the traffic volume for each time zone recorded in advance, or Based on the traffic volume for each time zone received from the server, the specifying unit 102 may specify each time (for example, during route search).

  The display control unit 103 controls the display of the traffic jam crossing specified by the specifying unit 102 to a display different from the normal display.

  The display unit 104 displays the traffic jam crossing controlled by the display control unit 103. The display unit 104 may be any device that can display a traffic crossing such as a display. Therefore, the display unit 104 displays a level crossing in which a certain level of traffic congestion including the traffic level crossing occurs, which is different from the normal display.

  Further, the display control unit 103 may display a traffic jam crossing as a symbol, and may change the display format of the traffic jam crossing displayed as a symbol according to the attribute information of the traffic jam crossing acquired by the acquisition unit 101. The symbol display includes, for example, a mark indicating a level crossing. To change the display format according to the attribute information, for example, the mark may be blinked or the color of the mark may be changed according to the length of the traffic jam or the time taken for passing the crossing. Specifically, for example, if the time taken to pass a level crossing is a predetermined time or more, display a prompt to bypass the traffic jam crossing by, for example, speeding up blinking of the mark or displaying the color of the mark in red. That's fine.

  The specifying unit 102 specifies a crossing that bypasses the traffic crossing (hereinafter referred to as “detour crossing”) based on the position of the traffic crossing determined from the crossing position on the map data, and the display control unit 103 Alternatively, a detour railroad crossing may be displayed as a symbol. The symbol display includes, for example, a mark indicating a level crossing. In this case, the display control unit 103 may change the display format of the detour railroad crossing according to the attribute information of the traffic crossing. In other words, when the congestion at a traffic crossing is greater than or equal to a predetermined level, the color of the mark may be displayed in a blue color, such as blinking in blue, and the color that prompts passage to the detour crossing may be displayed.

  In addition, the identifying unit 102 detours the traffic crossing and based on the position of the traffic crossing determined from the railroad crossing position on the map data, and a road that crosses the track (hereinafter referred to as “three-dimensional crossing road”). It may be specified. In this case, similarly to the above-described display of the detour crossing, the display control unit 103 may display a three-dimensional intersection road as a symbol. More specifically, the three-dimensional intersection road is an overpass that straddles the track or an underpass that passes under the track.

  In the present embodiment, the search unit 105 is an arbitrary component. The search unit 105 searches for a route to the destination. The search unit 105 calculates the link cost of each link when performing a route search by the Dijkstra method or the like, for example. When a traffic crossing is included in a link, the link cost of the link may be set high. For example, when a traffic crossing is included, a predetermined link cost value may be multiplied. The predetermined link cost value is a weight used at the time of link calculation, and may be a fixed value. For example, it may be set for each level crossing or for each time zone. Note that the link cost corresponding to the traffic crossing may be recorded in advance, and the recorded link cost may be read when there is a traffic crossing in the route search by the search unit 105.

  Further, the search unit 105 selects an optimum route among routes passing through a traffic jam crossing, a detour crossing, or a three-dimensional intersection road based on the set search conditions. The search conditions are conditions such as time priority and distance priority. The optimum route is a route that best matches the search condition.

  Further, a required time calculation unit 106 may be provided. The required time calculation unit 106 may add a predetermined time (for example, 10 minutes) when the route includes a traffic jam crossing to calculate the time required for the route to the destination.

  Further, the display control unit 103 may display that the route selected by the search unit 105 is a route that bypasses the traffic jam crossing. To display that it is a route that bypasses the traffic crossing, for example, you can create an image that displays that fact by text, or show the route that passes through the traffic crossing with a dotted line etc., and bypass the traffic crossing May be displayed.

(Display processing procedure of display device)
Next, a display processing procedure of the display device 100 will be described with reference to FIG. FIG. 2 is a flowchart illustrating an example of a display processing procedure of the display device according to the embodiment.

  In the flowchart of FIG. 2, the display device 100 waits for the acquisition unit 101 to acquire crossing attribute information (step S201: No loop), and when the acquisition unit 101 acquires crossing attribute information (step S201: Yes), the identifying unit 102 identifies a traffic crossing where a certain amount of traffic has occurred based on the acquired attribute information of the level crossing (step S202).

  Then, the display control unit 103 controls the display of the traffic jam crossing to a display different from the normal display (step S203). Then, the display unit 104 displays the traffic level crossing for which display control has been performed (step S204), and ends a series of processing.

  As described above, the display device 100 according to the present embodiment identifies the traffic crossing based on the attribute information of the level crossing, and controls the display of the identified traffic crossing to a display different from the normal display. I made it. According to such a display device 100, the user can obtain traffic information in the vicinity of a level crossing and can check a level crossing having a long transit time on the display screen. Therefore, the user can follow a travel route that avoids a crossing or a traffic jam with a long transit time. Moreover, if a large number of vehicles avoid a crossing with a long transit time, the traffic jam can be alleviated.

  Also, in the display device 100 according to the present embodiment, the display control unit 103 displays a traffic jam crossing as a symbol, and the traffic jam crossing displayed as a symbol according to the traffic jam crossing attribute information acquired by the acquisition unit 101 The format may be changed. According to such a configuration, the user can grasp the traffic crossing at a glance and can also grasp the degree of congestion at a glance.

  Moreover, in the display device 100 according to the present embodiment, the specifying unit 102 may specify the detour crossing, and the display control unit 103 may display the detour crossing as a symbol. According to such a configuration, the user can grasp the detour crossing at a glance and can easily find the detour crossing.

  Moreover, the display device 100 according to the present embodiment includes a required time calculation unit 106, and adds a predetermined time (for example, 10 minutes) to the route to the destination when the route includes a traffic jam crossing. The time may be calculated. In such a configuration, even if the searched route is, for example, a route passing through a traffic crossing or a route to a destination passing through a crossing with a long transit time, the waiting time due to the crossing is taken into consideration. The required time can be calculated. Therefore, even if the user waits for a crossing at a crossing with a long transit time, the calculated expected arrival time does not change. Can be done. Further, in such a configuration, if the searched route is a route that passes through a detour railroad or a three-dimensional crossing road, the user can avoid the traffic jam railroad crossing and can travel comfortably.

  Further, the search unit 105 in the display device 100 according to the present embodiment may select an optimum route from among a traffic crossing, a detour crossing, or a route passing through a three-dimensional intersection based on the set search conditions. Good. According to such a configuration, a route search according to search conditions such as time priority and distance priority can be performed.

  Further, the display control unit 103 in the display device 100 according to the present embodiment may display that the route selected by the search unit 105 is a route that bypasses the traffic jam crossing. According to such a configuration, the user can know that the displayed route is not a detour route but a route that bypasses the traffic jam crossing, and the time required to reach the destination is shortened. I can know that.

  Examples of the present invention will be described below. In the present embodiment, an example in which the display device 100 of the present invention is implemented by a navigation device mounted on a vehicle will be described.

(Hardware configuration of navigation device)
The hardware configuration of the navigation device 300 according to the present embodiment will be described with reference to FIG. FIG. 3 is a block diagram illustrating an example of a hardware configuration of the navigation device according to the present embodiment. In FIG. 3, a navigation device 300 is mounted on a moving body such as a vehicle, and includes a CPU 301, ROM 302, RAM 303, magnetic disk drive 304, magnetic disk 305, optical disk drive 306, optical disk 307, and audio. An I / F (interface) 308, a speaker 309, an input device 310, a video I / F 311, a display 312, a communication I / F 313, a GPS unit 314, and various sensors 315 are provided. Each component 301 to 315 is connected by a bus 320.

  The CPU 301 governs overall control of the navigation device 300. The ROM 302 stores various programs such as a boot program, a current location calculation program, a navigation program, a route guidance program, a voice generation program, a map data display program, and a symbol display program. The RAM 303 is used as a work area for the CPU 301.

  The current location calculation program, for example, calculates the current location of the vehicle (the current location of the navigation device 300) based on output information from a GPS unit 314 and various sensors 315 described later.

  The navigation program searches for an optimal route from the departure point to the destination point using map data recorded on a magnetic disk 305 described later. Here, the optimum route is the shortest (or fastest) route to the destination point or the route that best meets the conditions specified by the user. Further, not only the destination point but also a route to a stop point or a rest point may be searched. The searched guidance route is output to the audio I / F 308 and the video I / F 311 via the CPU 301.

  The route guidance program is based on the guidance route information searched by executing the navigation program, the vehicle current location information calculated by executing the current location calculation program, and the map data read from the magnetic disk 305. Real-time route guidance information is generated. The generated route guidance information is output to the audio I / F 308 and the video I / F 311 via the CPU 301.

  The voice generation program generates tone and voice information corresponding to the pattern. That is, based on the route guidance information generated by executing the route guidance program, the virtual sound source corresponding to the guidance point is set and the voice guidance information is generated and output to the voice I / F 308 via the CPU 301. .

  The map data display program displays map data recorded on the magnetic disk 305 and the optical disk 307 on the display 312 by the video I / F 311.

  The symbol display program displays the crossing position on the map data displayed on the symbol recorded on the magnetic disk 305 or the optical disk 307, and changes the display format based on the attribute information of the crossing.

  The magnetic disk drive 304 controls the reading / writing of the data with respect to the magnetic disk 305 according to control of CPU301. The magnetic disk 305 records data written under the control of the magnetic disk drive 304. As the magnetic disk 305, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 306 controls the reading / writing of the data with respect to the optical disk 307 according to control of CPU301. The optical disk 307 is a detachable recording medium from which data is read according to the control of the optical disk drive 306. As the optical disc 307, a writable recording medium can be used. In addition to the optical disk 307, the removable recording medium may be an MO, a memory card, or the like.

  The audio I / F 308 is connected to a speaker 309 for audio output. Examples of the input device 310 include a remote controller having a plurality of keys for inputting characters, numerical values, and various instructions, a keyboard, a mouse, and a touch panel. The input device 310 may be realized by any one of a remote controller, a keyboard, a mouse, and a touch panel, or may be realized by a plurality of forms.

  The video I / F 311 is connected to the display 312. Specifically, the video I / F 311 includes, for example, a graphic controller that controls the entire display 312, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, the display 312 is configured by a control IC or the like.

The display 312 displays icons, cursors, menus, windows, or various data such as characters and images. On the display 312, the above-described map data is drawn two-dimensionally or three-dimensionally. The map data displayed on the display 312 can be displayed with a mark representing the current location of the vehicle on which the navigation device 300 is mounted. The current location of the vehicle is calculated by the CPU 301.

  As this display 312, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted. The display 312 is installed near the dashboard of the vehicle, for example. A plurality of displays 312 may be installed in the vehicle, for example, in the vicinity of the dashboard of the vehicle or in the vicinity of the rear seat of the vehicle.

  The communication I / F 313 is connected to a network via wireless and functions as an interface between the navigation device 300 and the CPU 301. The communication I / F 313 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 301.

  Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication I / F 313 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices. Get road information such as regulations. VICS is a registered trademark.

  The GPS unit 314 receives radio waves from GPS satellites and outputs information indicating the current location of the vehicle. The output information of the GPS unit 314 is used when the current position of the vehicle is calculated by the CPU 301 together with output values of various sensors 315 described later. The information indicating the current location is information for specifying one point on the map data, such as latitude / longitude and altitude.

  The various sensors 315 output information that can determine the position and behavior of the vehicle, such as a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor. The output values of the various sensors 315 are used for the calculation of the current location of the vehicle by the CPU 301 and the measurement of the change in speed and direction.

  The acquisition unit 101, the specifying unit 102, the display control unit 103, the display unit 104, and the search unit 105 included in the display device 100 illustrated in FIG. 1 are the ROM 302, the RAM 303, and the navigation unit 300 illustrated in FIG. The CPU 301 executes a predetermined program using programs and data recorded on the magnetic disk 305, the optical disk 307, and the like, and realizes the function by controlling each part in the navigation device 300.

  That is, the navigation apparatus 300 of the present embodiment shows the functions provided in the display apparatus 100 shown in FIG. 1 by executing various programs recorded in the ROM 302 as a recording medium in the navigation apparatus 300, as shown in FIG. The display processing procedure can be executed.

(Example of display processing of navigation device 300)
Next, an example of display processing performed by the navigation device 300 according to the present embodiment will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of the display process of the navigation device according to the present embodiment.

  In the flowchart of FIG. 4, the navigation apparatus 300 is in a standby state until an instruction to start a route search is received (step S401: No loop). When an instruction to start a route search is received (step S401: Yes), for example, time Under the priority search condition, the route search is performed without multiplying the link including the railroad crossing by the link cost (step S402). Then, the route search is performed by multiplying the link including the railroad crossing by the link cost (step S403). The required time may be calculated by adding a predetermined time when the route includes a traffic jam crossing. The link cost calculation will be described later.

  Then, it is determined whether or not the above-described two routes are different (step S404). If it is determined in step S404 that the two routes are different (step S404: Yes), a traffic crossing is identified from the map data (step S405). More specifically, the two routes are different. Specifically, the route searched by multiplying the link by the link cost is a route that bypasses the traffic jam crossing, and is a route that takes less time than a route that passes through the traffic jam crossing. Means that.

  Then, the display format of the traffic crossing is changed according to the attribute information such as the length of the traffic jam and the waiting time for the level crossing (step S406). The change of the display format is, for example, blinking a traffic crossing in red, as will be described in detail later. And the detour crossing which detours a traffic jam crossing is specified (step S407). As a detour crossing, for example, a crossing that is not a traffic crossing but is another crossing existing along the same track as the traffic crossing may be used as the detour crossing. Then, according to the degree of congestion at the traffic crossing, for example, the display format of the detour crossing such as blinking the detour crossing in blue is changed (step S408).

  And the image which displayed that it is the path | route which detoured the traffic jam crossing is produced (step S409). The image in this case is, for example, a character image such as “I bypassed a crossing in a traffic jam” as will be described later. Then, the traffic crossing at which the display format is changed, the detour crossing, and the route passing through the detour crossing are displayed (step S410), and the series of processing ends. On the other hand, in step S404, when the two routes of the route searched without multiplying the link by the link cost and the route searched by multiplying the link by the link cost are not different (step S404: No), that is, on the link When it is determined that there is no traffic jam crossing, the series of processing ends.

  In the above description, in step S404, when the two routes are different, that is, when there is a route that bypasses the traffic jam crossing, the route that is automatically bypassed is selected. You may make it accept. Specifically, it displays a message such as "Do you want to detour the crossing in a traffic jam?", And when you receive an "YES" input from the user, displays the route that passes through the detour. When the input of “No” is accepted, a route passing through the traffic jam crossing may be displayed.

  Further, in this embodiment, when detouring a traffic crossing, not only the detour crossing but also a three-dimensional crossing road that crosses the track. In the case of a route for which a three-dimensional intersection road is selected, the display format may be changed, for example, the display of the three-dimensional intersection road is blinked in blue. In step S409, a character image is created. However, along with this, for example, a route passing through a traffic jam crossing may be indicated by a dotted line.

  Further, when all the level crossings near the traffic crossing are congested, that is, when the detour crossing cannot be specified, the route passes through the traffic crossing. In this case, it is only necessary to display that the route passes through a traffic jam crossing and to blink all the crossings displayed on the map in red.

(Example of link cost calculation process used during route search)
Next, an example of a link cost calculation process used in route search in this embodiment will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a link cost calculation process used in route search in this embodiment.

  In the flowchart of FIG. 5, the navigation device 300 calculates the link cost from the link length, the width, the number of lanes, the number of traffic lights, and the like (step S501). The crossing attribute of the link is acquired from the map data (step S502). Then, it is determined whether or not the acquired crossing attribute includes a crossing attribute of a traffic jam crossing (step S503). A method for assigning a level crossing attribute for a traffic jam level crossing will be described later. If it is determined in step S503 that the acquired level crossing attribute includes a level crossing attribute of a traffic jam crossing (step S503: Yes), it is determined whether the time to reach the link is within the time of the traffic jam crossing (step S504). .

  In step S504, when it is determined that the time to reach the link is within the time of traffic jam crossing (step S504: Yes), the link cost is increased by α (step S505), and the series of processes is terminated. Α is a weighting value set for each traffic crossing. On the other hand, when it is determined in step S503 that the acquired crossing attribute does not have a crossing attribute for a traffic jam crossing (step S503: No), a series of processing ends. If it is determined in step S503 that the time to reach the link is not within the time for traffic jam crossing (step S503: No), the series of processing ends. Note that the order of the processing in step S503 and step S504 is arbitrary, and the processing in step S504 may be performed first.

(Example of processing to generate attribute information for traffic crossings)
Next, with reference to FIG. 6, an example of processing for generating traffic crossing attribute information in the present embodiment will be described. FIG. 6 is a flowchart illustrating an example of processing for generating attribute information of a traffic jam crossing in the present embodiment.

  In the flowchart of FIG. 6, the number (N) that blocks traffic per certain time at a certain level crossing is acquired (step S <b> 601). The number (N) of traffic blocking is a value calculated based on, for example, the average value of traffic volume per fixed time and the opening / closing time of a level crossing per fixed time. And it is judged whether there exists any time slot | zone when the number (N) which interrupts the acquired traffic exceeds predetermined value ((beta)) (step S602). The constant value (β) is a threshold set for each level crossing. In addition, the time zone in this case is a time zone having a long blocking time, for example, a time zone such as 7:00 am to 9:00 am during rush hours. β may not be a constant value, and may be varied depending on the number of lanes, for example.

  In step S602, when it is determined that there is a time zone in which the number (N) of traffic blocking exceeds a predetermined value (β) (step S602: Yes), a crossing attribute of a traffic jam crossing is added to the link including the crossing ( Step S603). Then, the time zone in which N exceeds β is stored (step S604), and the series of processing ends. In Step S602, when it is determined that there is no time zone in which the number (N) of traffic blocking exceeds the predetermined value (β) (Step S602: No), the series of processes is terminated. Here, in step S604, the time zone where N exceeds β is stored, but it is not always necessary to store the time zone, and information indicating whether or not the level crossing is a traffic jam crossing is generated as at least attribute information. It only has to be done.

(Example of level crossing display)
Next, an example of a crossing display according to the present embodiment will be described with reference to FIG. FIG. 7 is an explanatory diagram illustrating an example of a crossing display according to the present embodiment.

  In FIG. 7, the display screen 700 displayed on the display 312 is north-up displayed, and the upper part of the display screen 700 is set to the north and displayed. The display screen 700 displays a track 710, a road 720, a railroad crossing 730 (730a to 730c), a three-dimensional intersection road 731, a current position 740, a destination 750, and a character display 760. Each level crossing 730 is displayed as a symbol. The level crossings 730a and 730b are traffic crossings. The level crossing 730c is a detour level crossing. The three-dimensional intersection road 731 is displayed as a symbol. The three-dimensional intersection road 731 is a road that three-dimensionally intersects the track.

  As will be described later, the display format of the level crossing 730 is changed based on attribute information such as the waiting time of the level crossing 730. In this embodiment, for example, the east-side traffic crossing 730a and the west-side traffic crossing 730b are close to the station 732, so the time when the circuit breaker is the longest is long, so the road is congested, The outer periphery shows red. Details of the color of the outer periphery of the crossing symbol will be described later. Further, the detour railroad crossing 730c is not congested, and the outer periphery of the crossing symbol indicates blue. In addition, in the three-dimensional intersection road 731, the outer periphery of the crossing symbol indicates yellow.

  It is assumed that when such a display screen 700 is displayed, it is assumed that the user is located at the current position 740 and a route search to the destination 750 is performed. In the normal route search, for example, a route that has followed the shortest route is drawn, that is, a route that passes through the east-side traffic crossing 730a or the west-side traffic crossing 730b is drawn. Then, a route passing through the railroad crossing 730c or a route passing through the three-dimensional intersection road 731 is searched. Then, the character image “760 crossing the crossing in a traffic jam” is displayed on the character display 760.

(Example of display format of level crossing symbols)
Next, an example of a display format of a crossing symbol according to the present embodiment will be described with reference to FIG. FIG. 8 is an explanatory diagram illustrating an example of a display format of a crossing symbol according to the present embodiment.

  In FIG. 8, a crossing symbol 800 is a symbol displayed on the crossing 730 shown in FIG. In FIG. 8, a railroad crossing symbol 800 includes a mark 810 indicating a train and an outer periphery 820. The color of the outer periphery 820 changes according to the attribute information. For example, when the time required to pass through a level crossing is very long, specifically, when it takes 30 minutes or more to pass through the level crossing, the light turns red. Further, for example, when it takes 10 minutes or more and 30 minutes or less to pass the railroad crossing, the light turns yellow. In addition, for example, when the time required to pass the railroad crossing is 10 minutes or less, that is, when it is not congested, the light turns blue. In addition, about lighting of the outer periphery 820, you may set arbitrarily not only in the system which represented the traffic jam in 3 steps | paragraphs using the three colors mentioned above.

(Example of the display format of the solid intersection symbol)
Next, an example of the display format of the solid intersection symbol according to the present embodiment will be described with reference to FIG. FIG. 9 is an explanatory diagram illustrating an example of a display format of a solid intersection symbol according to the present embodiment.

  In FIG. 9, a three-dimensional intersection symbol 900 is a symbol displayed on the three-dimensional intersection road 731 shown in FIG. In FIG. 9, a three-dimensional intersection symbol 900 is composed of a mark 910 indicating a three-dimensional intersection road and an outer periphery 920. The three-dimensional intersection symbol 900 may be displayed at all times, or may be displayed only when there is a traffic crossing in the vicinity. In addition, when there is a traffic crossing in the vicinity, the color of the outer periphery 920 may be changed to make it stand out. For example, when there is a traffic crossing in the vicinity, the user can be urged to pass through the three-dimensional intersection road by lighting the outer periphery 920 in blue.

  As described above, the navigation apparatus 300 according to the present embodiment identifies the traffic crossing based on the attribute information of the level crossing, and controls the display of the identified traffic crossing to a display different from the normal display. did. According to such a navigation apparatus 300, the user can confirm on the display screen a traffic crossing having a long transit time. Therefore, the user can follow a travel route that avoids a traffic crossing. Moreover, if a large number of vehicles avoid a crossing with a long transit time, the traffic jam can be alleviated.

  In addition, the navigation device 300 according to the present embodiment displays a traffic jam crossing as a symbol, and changes the display format of the traffic jam crossing displayed as a symbol according to the attribute information of the traffic jam crossing. According to such a configuration, the user can grasp the traffic crossing at a glance and can also grasp the degree of congestion at a glance.

  Further, the navigation device 300 according to the present embodiment identifies the detour crossing and displays the detour crossing as a symbol. According to such a configuration, the user can grasp the detour crossing at a glance and can easily find the detour crossing.

  Further, the navigation device 300 according to the present embodiment calculates a time required for a route by adding a predetermined time when a traffic jam crossing is included in a link. According to such a configuration, the required time in consideration of the waiting time due to the traffic crossing can be calculated even for the route to the destination via the traffic crossing. Therefore, even if the user waits for a level crossing at a traffic crossing, the calculated expected arrival time will not change, so the user must drive with ease and comfort after driving through the level crossing. Can do. Further, according to such a configuration, the user can avoid a traffic jam crossing and can travel comfortably as long as the route is a detour crossing or a route to a destination via a three-dimensional crossing road.

  In addition, the navigation device 300 according to the present embodiment selects, for example, a route having the shortest required time among routes passing through a traffic jam crossing, a detour crossing, or a three-dimensional intersection based on a time-first search condition. did. According to such a configuration, a route with the shortest required time can be searched.

  In addition, the navigation device 300 according to the present embodiment creates a character image for displaying that the selected route is a route that bypasses the traffic jam crossing. According to such a configuration, the user can know that the displayed route is not a detour route but a route that bypasses the traffic jam crossing, and the time required to reach the destination is shortened. I can know that.

  In addition, the navigation device 300 according to the present embodiment accepts selection of one of a route to a destination via a traffic crossing and a route to a destination via a detour railroad or a multilevel crossing road. It may be. According to such a configuration, the user can arbitrarily select a route and can respond to the preference of the user.

  As described above, according to the display device, the display method, the display program, and the recording medium of the present invention, the traffic crossing is identified based on the attribute information of the level crossing, and the display of the identified traffic crossing is displayed as a normal display. The display is controlled differently. According to such a configuration, the user can obtain the traffic jam information in the vicinity of the level crossing and can check the traffic level crossing having a long transit time on the display screen. Therefore, the user can follow a travel route that avoids a traffic crossing. Moreover, if a large number of vehicles avoid a crossing with a long transit time, the traffic jam can be alleviated.

  As described above, since screen display or route search taking account of the crossing time of a crossing can be realized, it is possible to travel while avoiding a crossing generally called a crossing without opening.

  The display method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. Further, this program may be a transmission medium that can be distributed via a network such as the Internet.

It is a block diagram which shows an example of a functional structure of the display apparatus concerning embodiment. It is a flowchart which shows an example of the display processing procedure of the display apparatus concerning embodiment. It is a block diagram which shows an example of the hardware constitutions of the navigation apparatus concerning a present Example. It is a flowchart which shows an example of the display process of the navigation apparatus concerning a present Example. In this example, it is a flowchart which shows an example of the process of calculation of the link cost used at the time of a route search. 6 is a flowchart illustrating an example of data storage processing for use in identifying a traffic crossing in this embodiment. It is explanatory drawing which shows an example of the display of a level crossing concerning a present Example. It is explanatory drawing which shows an example of the display format of a crossing symbol concerning a present Example. It is explanatory drawing which shows an example of the display format of the solid intersection symbol concerning a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Display apparatus 101 Acquisition part 102 Identification part 103 Display control part 104 Display part 105 Search part 106 Time required calculation part 300 Navigation apparatus 730 Level crossing 730a Congestion level crossing 730b Congestion level crossing 731 Level crossing road 800 Level crossing symbol 810 Mark 820 Outer periphery 910 Mark 920

Claims (8)

A recording means for recording map data;
Acquisition means for acquiring crossing attribute information;
A crossing that bypasses the traffic crossing based on whether the crossing is a traffic crossing based on the attribute information and the position of the traffic crossing determined from the crossing position on the map data (hereinafter, “detour”). A specific means of identifying the level crossing)
Display control means for controlling the traffic crossing and the detour crossing specified by the specifying means so as to display different symbols respectively ;
Display means for displaying the traffic jam crossing symbol display and the detour railroad crossing symbol display controlled by the display control means;
A display device comprising: The specifying means bypasses the traffic jam crossing based on the position of the traffic jam crossing specified from the railroad crossing position on the map data, and a road that crosses the track (hereinafter referred to as a “three-dimensional cross road”). Identify
The display device according to claim 1 , wherein the display control means displays the three-dimensional intersection road as a symbol. An input means for specifying at least a destination;
And a search means for searching for a route from the departure place to the destination,
When the route includes a link including the traffic jam crossing specified by the specifying unit, the search unit performs a route search by multiplying a link cost of the link by a predetermined link cost value. the display device according to claim 1 or 2. The search means, based on the set search condition, the congestion level crossing, the detour crossing or of the path through the crossing roads, according to claim 3, characterized by selecting an optimal route Display device. The display device according to claim 3 , wherein the display control unit displays that the route selected by the search unit is a route bypassing the traffic jam crossing. An acquisition process for acquiring attribute information of a level crossing;
Based on the level crossing attribute information acquired in the acquisition step, whether or not the level crossing is a traffic crossing, and based on the position of the traffic crossing identified from the crossing position on the map data, bypass the traffic crossing A specific process for identifying the level crossing to be performed (hereinafter referred to as the “detour level crossing”) ,
A display control step for controlling the traffic crossing and the detour crossing specified by the specific step so as to display different symbols, respectively ;
A display step for displaying the symbol display of the traffic crossing and the symbol display of the detour crossing controlled by the display control step;
A display method comprising: A display program for causing a computer to execute the display method according to claim 6 . 8. A computer-readable recording medium on which the display program according to claim 7 is recorded.

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