JP2009217716A - Traffic information processing system, in-vehicle device, traffic information processing method and traffic information processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic information processing system for eliminating noise information of probe data, an in-vehicle device, a traffic information processing method and a traffic information processing program. <P>SOLUTION: A statistic server 2 for taking the statistics of probe data including the present time acquires probe data transmitted from a navigation system of a vehicle traveling in a noise determination section on the basis of a toll gate of a toll road, determines whether the acquired probe data are information transmitted from a vehicle waiting for the change of a toll on the basis of the present time included in the probe data, and excludes corresponding probe data from a statistical target. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a traffic information processing system, an in-vehicle device, a traffic information processing method, and a traffic information processing program.

In recent years, intelligent transport systems have been developed to support smooth driving of automobiles. For example, a system that generates road traffic information by regarding a vehicle traveling on a road as a sensor and collecting probe data including a current position and a vehicle speed from a communication device mounted on the vehicle has been developed. In order to popularize this system, probe data collection methods, statistical methods, and the like have been studied.

As an example of such a system, Patent Document 1 describes a system that changes the length of a traffic information determination section for determining road conditions from probe data in accordance with the number of vehicles. For example, when the number of vehicles traveling on a road section is small or when the vehicle speed of a vehicle traveling on that section is high, the section is lengthened and the number of data collected from the section is adjusted, so that the section is shortened. Data variation due to being too much is suppressed. In addition, in order to exclude data from a vehicle that is stopped for the driver's intention, data of a vehicle that travels over a predetermined travel time width is excluded as a noise component.
JP 2006-31422 A

  However, in the noise removal method of the above system, depending on the setting of the travel time width, it may be removed as a noise component even though it is originally a traffic jam, or may be adopted as normal data even though it is parked. For example, a service is known that changes the toll charge for toll roads by specifying the applicable time. A vehicle that waits for the toll change timing near the toll booth in order to use this service. There are many. In this case, the waiting time of the vehicle is considered to be about several minutes. Therefore, in the above system and the existing system, probe data transmitted from such a vehicle is also handled as statistical data. For this reason, by using uncertain data for statistics, the traveling time in the vicinity of the toll booth becomes longer, and the accuracy of the generated road traffic information is lowered.

  The present invention has been made in view of the above problems, and an object thereof is to provide a traffic information processing system, an in-vehicle device, a traffic information processing method, and a traffic information processing program capable of removing noise information from probe data. There is to do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a traffic information processing system for statistically analyzing probe information including time information, and is mounted on a vehicle traveling on a road section based on a toll gate on a toll road. Probe information acquisition means for acquiring the probe information transmitted from the apparatus, and whether the acquired probe information is information transmitted from a vehicle waiting for a toll change time is included in the probe information The gist of the present invention is that it comprises determination means for determining based on the time information and excluding corresponding probe information from the statistical object.

According to a second aspect of the present invention, in the traffic information processing system according to the first aspect, the probe information acquisition means acquires the probe information including the time information when passing through a toll gate, and the determination means The gist is to exclude the probe information from the statistical object when the time information indicates a time within a predetermined time since the change start time of the toll.

  According to a third aspect of the present invention, in the traffic information processing system according to the first aspect, the probe information acquisition means includes the probe information including an entry time at which the vehicle enters the road section, and an exit from the road section. The probe information including the time is acquired, and the determination unit excludes the probe information from the statistical target when a change start time of a toll is included between the entry time and the exit time. The gist is to do.

  According to a fourth aspect of the present invention, in the in-vehicle device that generates and transmits probe information, it is determined whether or not the generated probe information is probe information that belongs to a road section based on a toll gate on a toll road. And the generated probe information determines whether the travel time indicated by the generated probe information corresponds to the change time of the toll, and determines that the generated time corresponds to the change time of the toll. The gist of the present invention is to provide probe information transmitting means for excluding information from transmission targets.

  According to a fifth aspect of the present invention, in the traffic information processing method for statistically analyzing the probe information using a control means for acquiring probe information including time information, the control means is based on a toll gate on a toll road. The probe information acquired from the in-vehicle device of the vehicle traveling on the road section is acquired, and whether the acquired probe information is information transmitted from the vehicle waiting for the toll change time or not The gist is to exclude the relevant probe information from the statistical object.

  The invention according to claim 6 is a traffic information processing program that statistically analyzes the probe information using a control unit that acquires probe information including time information, and the control unit is based on a toll gate on a toll road. Probe information acquisition means for acquiring the probe information transmitted from an in-vehicle device of a vehicle traveling on a road section, and whether the acquired probe information is information transmitted from a vehicle waiting for a toll change time The gist is to determine whether or not based on the time information included in the probe information and to function as a determination means for excluding the corresponding probe information from the statistical object.

  According to the first aspect of the present invention, when the probe information is acquired from the vehicle in the road section based on the toll gate, and the information is from the vehicle waiting for the change time based on the time included in the probe information. Excludes that information. For this reason, it is possible to exclude uncertain information and perform statistics using reliable information.

  According to the second aspect of the present invention, if the probe information includes a time close to the change start time of the toll, the probe information is excluded from the statistical object. For this reason, it is possible to perform statistics using reliable information and to reduce the amount of processing for removing uncertain information.

  According to the third aspect of the present invention, when the change start time of the toll is included between the entry time and the exit time of the road section based on the toll gate, the probe information is taken from the statistical object. Since it is excluded, statistics can be performed using reliable information, and the processing amount for removing uncertain information can be reduced.

According to the invention described in claim 4, the in-vehicle device generates the probe when the generated probe information belongs to a road section based on the toll gate of the toll road and corresponds to the toll change time. Exclude information from transmission. For this reason, it is possible to exclude uncertain information and prevent unnecessary data from being transmitted.

  According to the fifth aspect of the present invention, when the probe information is obtained from the vehicle in the road section based on the toll gate, and the information is from the vehicle waiting for the change time based on the time included in the probe information. Excludes uncertain information because it excludes that information. Therefore, statistics can be performed using reliable information.

  According to the invention described in claim 6, in accordance with the traffic information processing program, the probe information is acquired from the vehicle in the road section based on the toll gate, and the vehicle waiting for the change time based on the time included in the probe information. If the information is, the information is excluded. For this reason, it is possible to exclude uncertain information and perform statistics using reliable information.

(First embodiment)
Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram for explaining a probe information processing system 1. In the present embodiment, a communication device that transmits probe data (probe information) is embodied in a navigation device 10 as an in-vehicle device.

  The navigation device 10 mounted on the vehicle C is connected to the statistical server 2 as a traffic information processing system installed in the management center 4 via the relay device 3 and a dedicated line or a public line network. The navigation device 10 transmits the probe data to the statistics server 2 via the relay device 3. The statistics server 2 of the present embodiment collects probe data from a large number of navigation devices 10, removes noise information from the probe data, performs statistical processing, generates road traffic data, and distributes the data to each navigation device 10. .

  Next, the hardware configuration of the navigation device 10 will be described with reference to FIG. The navigation device 10 includes a control unit 11. The control unit 11 includes a CPU 12, a RAM 13, a ROM 14, a vehicle side interface (I / F) 15, a communication interface (I / F) 16, and an identification data storage unit 17. A probe information transmission program is stored in the ROM 14 or a storage unit (not shown).

The CPU 12 identifies the position of the vehicle by radio navigation and autonomous navigation based on detection signals acquired from the GPS (Global Positioning System) receiving unit 30, the vehicle speed sensor 31, and the gyro 32 via the vehicle-side I / F 15.

Further, the CPU 12 acquires an on signal indicating depression of the brake pedal from an electronic control device (hereinafter referred to as ECU 33) mounted on the vehicle C via the vehicle side I / F 15.
The communication I / F 16 is an interface for connecting to the relay device 3, and the CPU 12 transmits probe data to the statistics server 2 and receives road traffic data from the statistics server 2 via the communication I / F 16. .

  The identification data storage unit 17 stores a vehicle ID 22 assigned to each vehicle. When transmitting the probe data, the CPU 12 transmits the probe data with the vehicle ID 22 unique to the vehicle.

  Further, the navigation device 10 reads route network data (hereinafter referred to as route data 19A) and map drawing data 19B from the geographic information storage unit 18 formed of an external storage medium such as an internal hard disk or an optical disk.

  The route data 19A has a link ID, a connection node, a road type, and a link cost. Nodes are data elements indicating intersections, interchanges, road end points, and the like, and links are data elements that connect the nodes.

  The map drawing data 19B is stored for each mesh obtained by dividing a map of the whole country, and has background data for drawing roads, urban areas, facilities, etc., road shape data indicating the shape of the roads, and the like. The CPU 12 collates the road shape data with the travel locus, and performs map matching for specifying the vehicle position on the road.

  In response to the data request from the relay device 3, the CPU 12 generates probe data 40 and transmits it to the relay device 3. FIG. 3 is a conceptual diagram illustrating the data configuration of the probe data 40. The probe data 40 includes a vehicle ID 40A, a current position 40B, a travel link 40C, a current time 40D as time information, a traveling direction 40E, a speed 40F, and a brake flag 40G. The vehicle ID 40 </ b> A is the same identification data as the vehicle ID 22 stored in the identification data storage unit 17. The current position 40B is the position of the vehicle C when the probe data 40 is transmitted or generated, and the traveling link 40C is the link ID of the road to which the current position 40B is mapped. The current time 40D is the time when the probe data 40 is transmitted or generated. The traveling direction 40E is the traveling direction of the vehicle C when the probe data 40 is transmitted or generated. The speed 40F is a vehicle speed when the probe data 40 is transmitted or generated, and is a value calculated based on the vehicle speed sensor 31. The brake flag 40G is a flag indicating whether or not the brake pedal has been depressed, and is set based on an on signal or an off signal acquired from the ECU 33. In addition to this, the probe data 40 may include travel information such as the operating status of the wiper and the operating status of the ABS.

  As shown in FIG. 2, the navigation device 10 includes an image processor 35 and an audio processor 36. The image processor 35 reads out the map drawing data 19B and displays the map screen 5A on the display 5, according to the road traffic data received from the statistics server 2, the presence or absence of traffic congestion, approach to the alerting point, etc. The traffic information display of is displayed. Further, the voice processor 36 outputs guidance voices such as the presence / absence of traffic jam / congestion, approach to the alerting point, etc. from the speaker 6 provided in the passenger compartment according to the road traffic data received from the statistical server 2.

  Next, the statistics server 2 will be described with reference to FIG. The statistical server 2 includes a computer 20 including a CPU 21, a RAM 22, a ROM 23, and a communication interface (I / F) 24. The statistics server 2 includes a probe data storage unit 25, a traffic information storage unit 26, and a filter information storage unit 27. The computer 20 constitutes probe information acquisition means, determination means, and control means. A traffic information processing program is stored in the ROM 23 or a storage unit (not shown).

In the probe data storage unit 25, probe data 40 received from each navigation device 10 is temporarily stored. The traffic information storage unit 26 stores road traffic data 41 generated by statistically processing the probe data 40. The filter information storage unit 27 stores discount time data 42. In this embodiment, the discount time data 42 stores information related to a discount service for toll roads for vehicles equipped with ETC (Electronic Toll Collection system) on-board devices. This discount service is a service applied in a predetermined time zone. Specifically, the discount time data 42 has a change time composed of a discount start time (change start time) and a discount end time for each discount service.

The computer 20 performs statistics using the probe data 40 temporarily stored in the probe data storage unit 25 and generates road traffic data 41. Although this statistical method is not particularly limited, for example, one vehicle C calculates the travel time (required time) from the point X to the point Y using the probe data 40 transmitted at the point X and the point Y. This is repeated for the probe data 40 of each vehicle C, and the average travel time from point X to point Y is calculated and included in the road traffic data 41. Alternatively, using the probe data 40 of each vehicle C collected at the points X and Y, the point X to the point of the point X to the point of the speed X from the point X to the point Y of each vehicle C and the frequency of the brake flag 40G. The degree of congestion between the points Y is determined. The determined congestion degree is included in the road traffic data 41.

  Next, the processing procedure of this embodiment is demonstrated according to FIGS. In this embodiment, each relay device 3 is installed at a point A and a point C before and after the toll booth T of the toll road R shown in FIG. Using the collected probe data 40, road traffic data 41 near the toll gate is generated. Here, the reference for determining the noise information is the passage time of the point B. In the present embodiment, the relay device 3 installed at the point B uses a device having a communication area of about 3 to 5 m, and receives the probe data 40 from only the vehicle C on which the ETC onboard equipment is mounted. It may be installed near the toll booth dedicated to ETC. Or you may make it receive the probe data 40 from all the vehicles C which pass the toll gate T regardless of the presence or absence of an ETC onboard equipment.

  FIG. 5 shows a procedure when the navigation apparatus 10 transmits the probe data 40. When the control unit 11 of the navigation device 10 receives a data request from the relay device 3 installed at the point B, the control unit 11 generates probe data 40. Specifically, the current position is first acquired (step S1-1). At this time, the link ID to which the current position is mapped is extracted, and this link ID is set as the traveling link 40C. Further, the traveling direction 40E is acquired based on the gyro 32 or the route data 19A.

  Further, the control unit 11 acquires the current time 40D via a clock oscillator built in the navigation device 10 or an external network (step S1-2). Further, various signals are acquired from the vehicle speed sensor 31 and the ECU 33, and travel information including speed, presence / absence of a brake, and the like is acquired (step S1-3). At this time, the control unit 11 calculates the speed 40F based on the vehicle speed pulse, and sets the brake flag 40G based on a detection signal indicating whether or not the brake pedal is depressed. For example, if it is determined that the brake pedal has been depressed, the brake flag 40G is set to “1”.

  When acquiring the current position 40B, the current time 40D, and the travel information, the control unit 11 assigns the vehicle ID 40A that is the same as the vehicle ID 22 and generates the probe data 40. Further, the generated probe data 40 is transmitted to the relay device 3 that has made a data request via the communication I / F 16 (step S1-4).

  The relay device 3 installed at the point B transmits the received probe data 40 to the statistics server 2. The statistical server 2 temporarily stores the received probe data 40 in the probe data storage unit 25.

  As shown in FIG. 6, the statistical server 2 performs noise removal on the probe data 40 collected at the point B (step S2-1), and performs statistical processing on the probe data 40 from which the noise information has been removed as a statistical target. Then, the road traffic data 41 is generated (step S2-2). The road traffic data 41 generated at this time may be information indicating traffic congestion / congestion from point A to point C including the toll gate, or traffic congestion / congestion from point A to point B or from point B to point C. It may be information indicating. When the computer 20 generates the road traffic data 41, the computer 20 transmits the road traffic data 41 to each navigation device 10 (step S2-3).

  Here, the noise removal processing will be described in detail with reference to FIG. The computer 20 acquires the probe data 40 collected at the toll booth T (point B) among the probe data 40 temporarily stored in the probe data storage unit 25 (step S3-1). When the relay device 3 that has transmitted the probe data 40 can be identified, the probe data 40 transmitted from the relay device 3 installed at the point B may be extracted, and the transmission source relay device 3 cannot be identified. May determine whether or not the current position 40B included in the probe data 40 is the coordinates of the point B.

  As described above, by acquiring the probe data 40 only in the section with the toll gate T as a reference, noise removal according to the situation in the vicinity of the toll gate T can be performed. That is, it is possible to make a noise determination that applies conditions that can be applied only in the vicinity of the toll gate T.

  When the probe data 40 collected at the point B is acquired, the computer 20 compares the current time 40D included in the probe data 40 with the discount time data 42 stored in the filter information storage unit 27, and obtains the probe data 40. It is determined whether or not the transmitted vehicle C has passed the point B immediately after the discount of the toll is started (step S3-2). Specifically, it is determined whether or not the current time 40D is within a predetermined time (for example, 5 minutes) after the discount start time included in the discount time data 42 has passed.

  For example, when a discount service is applied when passing through a toll booth T at a specified time zone or when traveling on a toll road in a specified time zone, the discount time data 42 includes “6” as the discount start time. "9:00" is stored as the discount time. When there are a plurality of discount services, a plurality of sets of discount start times and discount end times are stored. The computer 20 selects the discount start time closest to the current time 40D from among the discount start times stored in the discount time data 42. For example, after the current time 40D has passed the discount start time “6 o'clock”. It is determined whether it is included within a predetermined time.

  If it is determined that the current time 40D is included within a predetermined time after the discount start time has elapsed and the transmission source vehicle C has passed immediately after the discount start (YES in step S3-2), the probe data 40 The vehicle C that has transmitted is likely to have passed the point B after waiting for the discount start time. In this case, for example, the time required for point A to point B or point A to point C is increased only for the time waiting in front of the entrance of the toll booth T, or there is no congestion at the point A. The speed 40F at the point A is reduced. Therefore, the computer 20 regards the probe data 40 included within the predetermined time after the discount start time as the current time 40D as noise information and excludes it from the statistical target (step S3-3).

  On the other hand, when the current time 40D is not included within the predetermined time after the discount start time has elapsed, and it is determined that the transmission source vehicle C is not a vehicle that has passed immediately after the discount start (NO in step S3-2), The probe data 40 is included in the statistical object (step S3-4).

  As described above, when the noise removal process is performed, the process returns to step S2-2 illustrated in FIG. 6 to perform a known statistical process. Here, the statistics are performed using the probe data 40 that is the statistical target in step S3-2. By performing the noise removal process before the statistics, the road traffic data 41 with high accuracy can be generated even with a relatively small number of data. Therefore, the time required for data collection is also shortened, and the update frequency of the road traffic data is reduced. Can be improved.

  In addition, at point B, an ETC-using vehicle and a vehicle that does not use ETC branch, so if the relay device 3 at point B is installed so as to receive probe data 40 only from a vehicle that uses ETC, the use of ETC Only the probe data 40 from the vehicle can be easily excluded.

  When statistical processing is performed, the computer 20 generates road traffic data 41 and transmits it to the navigation device 10 via the relay device 3 (step S2-3). When the navigation device 10 receives the road traffic data 41 and determines that the information is around the vehicle position, the navigation device 10 controls the voice processor 36 to output a guidance voice for notifying the average travel time, congestion information, etc. from the speaker 6. To do. Alternatively, the image processor 35 is controlled to output a traffic guide display on the display 5.

According to the first embodiment, the following effects can be obtained.
(1) In 1st Embodiment, the statistics server 2 acquires the probe data 40 transmitted from the navigation apparatus 10 which drive | works the noise determination area on the basis of the toll gate T of a toll road. Further, it is determined based on the current time 40D included in the probe data 40 whether the acquired probe data 40 is information transmitted from the vehicle C waiting for the toll change time. Exclude 40 from the statistics. For this reason, since uncertain data can be excluded and statistics can be performed using reliable data, road traffic data 41 with small errors can be generated.

  (2) In the first embodiment, the statistics server 2 acquires the probe data 40 including the current time 40D when passing through the toll gate T. Then, when the current time 40D is a time within a predetermined time after the passage of the toll discount start time, the probe data 40 is excluded from the statistical target. For this reason, statistics can be performed using reliable information, and noise information is removed because the data to be processed is data collected in the vicinity of the toll booth T and is determined only by the passage time. Therefore, the processing amount can be reduced.

(Second Embodiment)
Next, a second embodiment embodying the present invention will be described with reference to FIGS. Since the second embodiment has a configuration in which the noise removal processing procedure of the first embodiment is changed, detailed description of the same parts is omitted.

  In the present embodiment, noise information is removed using the probe data 40 from the relay device 3 installed at each of the points A and C shown in FIG. The points A and C are points that are a predetermined distance (for example, 200 m) away from the point B where the toll gate T is located. Note that the points A and C may be set at positions where the distances from the toll gate T are different from each other, and are appropriately changed according to the road shape and the like near each toll gate. In the present embodiment, a road section (hereinafter referred to as a noise determination section) serving as a reference for determining noise information is a section from point A to point C.

  As shown in FIG. 9, the computer 20 extracts data on the same vehicle collected in the noise determination section (step S4-1). That is, the probe data 40 having the same vehicle ID 40A and collected at the points A and C is extracted.

  Next, the computer 20 acquires the entry time when entering the noise determination section (step S4-2). At this time, the computer 20 extracts the traveling direction 40E of the probe data 40 and acquires the traveling direction in the noise determination section. For example, as shown in FIG. 10, when the traveling direction 40E is a direction from the point A to the point C, the current time 40D “16:48” of the probe data 40 received at the point A is set as the entry time. When the traveling direction 40E is a direction from the point C to the point A, the current time 40D of the probe data 40 received at the point C is set as the entry time.

Furthermore, the computer 20 acquires the exit time when the computer exits from the noise determination section (step S4-3). Similar to step S4-2, the computer 20 reads the probe data 40.
The traveling direction in the noise determination section is acquired based on the traveling direction 40E. As shown in FIG. 10, when the traveling direction 40E is a direction from the point A to the point C, the current time 40D “17: 5” of the probe data 40 received at the point C is set as the exit time.

  Next, the computer 20 determines whether or not a discount start time is included between the entry time and the exit time (step S4-4). The computer 20 extracts the discount time data 42 of the road including the noise determination section from the discount time data 42 stored in the filter information storage unit 27. For example, the discount start time “17:00” closest to the entry time is extracted, and it is determined whether or not the discount start time is included between the entry time and the exit time.

  When it is determined in step S4-4 that the discount start time “17:00” is included between the entry time “16:48” and the exit time “17: 5” as shown in FIG. (YES in step S4-4), the vehicle C that transmitted the probe data 40 has a relatively high possibility of passing the point B after waiting for the discount start time. Therefore, the corresponding probe data 40 is excluded from the statistical object (step S4-5).

  On the other hand, if it is determined in step 4-4 that the discount start time is not included between the entry time and the exit time (NO in step S4-4), the probe data 40 is included in the statistical target (step S4-4). S4-6).

When the determination of whether or not the probe data 40 is noise information ends, the process proceeds to the statistical process (step S2-2) shown in FIG.
Therefore, according to the second embodiment, the following effect can be obtained in addition to the effect (1) described in the first embodiment.

  (3) In 2nd Embodiment, the statistics server 2 acquires the probe data 40 containing the approach time with respect to a noise determination area, and the probe data 40 containing the exit time which left the noise determination area. Further, it is determined whether or not a change start time of the toll is included between the entry time and the exit time. If the change start time is included, the probe data 40 is excluded from the statistical target. To do. For this reason, it is possible to perform statistics using reliable information and to remove noise information because the data to be processed is data collected in the vicinity of the toll booth T and is determined only by the passage time. Therefore, the processing amount can be reduced.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. Note that the third embodiment has a configuration in which the noise removal processing procedure of the first embodiment is changed, and thus detailed description of the same parts is omitted.

In the present embodiment, noise information is removed using the probe data 40 from the relay device 3 installed at each of the points A and C shown in FIG.
First, the computer 20 acquires the probe data 40 of the determination target vehicle collected in the noise determination section (step S5-1). The determination target vehicle is a vehicle that determines whether or not the probe data 40 is noise information. Further, the noise determination section is a section between the point A and the point C. Specifically, the computer 20 has the same vehicle ID 40A and extracts the probe data 40 collected at the points A and C.

  Next, the computer 20 extracts the probe data 40 of the comparison target vehicle (step S5-2). Specifically, the probe data 40 temporarily stored in the probe data storage unit 25 has a vehicle ID 40A different from the vehicle ID 40A of the determination target vehicle, and is received at approximately the same time on the same day at the points A and C. Probe data 40 is extracted.

  Furthermore, the computer 20 acquires the entry time when the determination target vehicle and the comparison target vehicle entered the noise determination section based on the traveling direction 40E (step S5-3). For example, as shown in FIG. 12A, the entry time of the determination target vehicle C1 is “16:48”, and as shown in FIG. 12B, the entry time of the comparison target vehicle C2 is “16:48”.

  Further, based on the traveling direction 40E, the exit time at which the determination target vehicle and the comparison target vehicle have left the noise determination section is acquired (step S5-4). For example, as shown in FIG. 12A, the exit time of the determination target vehicle C1 is “17: 5”, and as shown in FIG. 12B, the exit time of the comparison target vehicle C2 is “16:53”.

  Then, the computer 20 acquires the required times ΔT1 and ΔT2 of the noise determination sections of the vehicles C1 and C2, respectively (step S5-5). In the case of FIG. 12A, the required time ΔT1 of the determination target vehicle C1 is 17 minutes.

  On the other hand, as shown in FIG. 12B, the time when the comparison target vehicle C2 passes through the point A is “16:48”, and the time when it passes through the point C is “16:53”. The required time ΔT2 of the comparison target vehicle C2 is 5 minutes.

  Next, the computer 20 determines whether or not the value obtained by subtracting the required time ΔT2 from the required time ΔT1 is equal to or less than the threshold value TA (step S5-6). The threshold TA is set to “2 minutes”, for example. If the value obtained by subtracting required time ΔT2 from required time ΔT1 is equal to or less than threshold value TA (YES in step S5-6), it is determined that required times ΔT1 and ΔT2 are substantially equal, and the process proceeds to step S5-7.

  On the other hand, if the value obtained by subtracting the required time ΔT2 from the required time ΔT1 is greater than the threshold TA (NO in step S5-6), as shown in FIG. The possibility that the vehicle C1 is waiting for the discount start time is relatively high. In this case, the corresponding probe data 40 is excluded from the statistical target (step S5-9).

  In step S5-7, the computer 20 determines whether or not the number of comparisons comparing the required time ΔT1 of the determination target vehicle C1 and the required time ΔT2 of the comparison target vehicle C2 has reached a predetermined number N. For example, if the predetermined number N is set to “3” and the comparison number is “1”, it is determined that the comparison number has not reached the predetermined number N (step S5-7). NO) returns to step S5-2. On the other hand, when the comparison with the comparison target vehicle C2 is performed three times and it is determined that the required time ΔT1 is almost equal to the required time ΔT2 of the comparison target vehicle C2, the number of comparisons is a predetermined number in step S5-7. It is determined that N has been reached (YES in step S5-7). Then, the probe data 40 to be determined is included in the statistical object (step S5-8), and the process proceeds to step S2-2 shown in FIG.

Therefore, according to the third embodiment, in addition to the effect (1) described in the first embodiment, the following effect can be obtained.
(4) In 3rd Embodiment, the statistics server 2 acquires the probe data 40 including the approach time with respect to the noise determination area of the determination object vehicle C1, and the probe data 40 including the exit time withdrawn with respect to the noise determination area. Further, based on the entry time and the exit time, the required time ΔT1 of the noise determination section of the determination target vehicle C1 is calculated, and the required time ΔT2 of the noise determination section of the comparison target vehicle C2 is calculated in the same manner, from the required time ΔT1. When the value obtained by subtracting the required time ΔT2 is larger than the threshold TA, the probe data 40 transmitted from the determination target vehicle C1 is excluded from the statistical target. Therefore, statistics can be performed using reliable information. Also, only uncertain information that is biased compared to other vehicle data can be excluded. Further, since the data to be processed is data collected in the vicinity of the toll gate T, the processing amount for removing noise information can be reduced.

In addition, you may change this embodiment as follows.
-In 1st and 2nd embodiment, the navigation apparatus 10 may perform the process for excluding noise information. In this case, the control unit 11 of the navigation device 10 constitutes road section determination means and probe information transmission means. At this time, discount time data 42 is stored in the geographic information storage unit 18 of the navigation device 10. For example, as illustrated in FIG. 13, the control unit 11 of the navigation device 10 acquires probe data that has been generated and stored (step S <b> 6-1). Further, it is determined whether or not the acquired probe data is probe data 40 belonging to a road section with a toll gate on the toll road as a reference (step S6-2). Specifically, whether or not the current position 40B stored as the position information when the probe data 40 is generated matches the position of the toll booth, facility data not shown, route data 19A or map drawing data Judgment based on 19B. If the probe data belongs to the road section (YES in step S6-2), it is determined whether the travel time indicated by the probe data corresponds to the toll change time (step S6-3). Specifically, it is determined whether or not the current time 40D stored as the time when the probe data 40 is generated is within a predetermined time (for example, 5 minutes) after the discount start time has passed. If it is determined that the travel time corresponds to the change time (YES in step S6-3), the probe data is excluded from transmission targets (step S6-4). On the other hand, if the probe data does not belong to the road section (NO in step S6-2) and if the travel time does not correspond to the change time of the toll (NO in step S6-3), the probe data is set as the transmission target. (Step S6-5). After that, when the control unit 11 receives a probe data request, it transmits only probe data to be transmitted, and does not transmit probe data that is not to be transmitted. Thereby, the navigation apparatus 10 can exclude uncertain information and can prevent unnecessary data from being transmitted.

  In the above embodiment, the statistical server 2 performs the noise removal processing. However, the noise removal processing may be performed by the relay device 3 or a device interposed between the statistical server 2 and the relay device 3. . For example, in the case of the first embodiment, the relay device 3 or the device may stop data transmission to the statistics server 2 for a predetermined time from the discount start time. In this case, the relay device 3 or the above device constitutes a traffic information processing system.

  The navigation apparatus 10 may transmit the probe data 40 including a flag indicating whether or not an ETC on-vehicle device is installed in the vehicle C. In this case, data indicating that the ETC in-vehicle device is attached is registered in the navigation device 10 in advance. When the ETC flag is “ON”, the statistical server 2 determines that the vehicle C that has transmitted the probe data 40 is a vehicle equipped with an on-board device of ETC, and the method according to the first to third embodiments. Based on whether or not the transmission source vehicle C is an ETC using vehicle, it is determined whether or not the data is noise information. When the ETC flag is “ON” and it is determined as noise information by the method of the first to third embodiments, the probe data 40 is excluded from the statistical target. When the ETC flag is “off”, the data is not included in the statistics object because it is not a vehicle to which the toll discount is applied. If it does in this way, it can be made into a statistics object, without excluding the data from vehicles which are not carrying ETC onboard equipment.

-You may make it remove noise information combining 1st Embodiment and 3rd Embodiment. That is, the first determination process for determining whether or not the value obtained by subtracting the required time ΔT2 from the required time ΔT1 of the noise determination section exceeds the threshold TA, and whether the point B has passed after the discount start time has passed. You may perform both the 2nd judgment processing which judges whether or not. The order of each determination process is not particularly limited. In this way, uncertain data can be determined more accurately.

  -You may make it remove noise information combining 2nd Embodiment and 3rd Embodiment. That is, the discount is performed between the first determination process for determining whether or not the value obtained by subtracting the required time ΔT2 from the required time ΔT1 of the noise determination section exceeds the threshold TA, and the entry time and the exit time for the noise determination section. Both of the third determination processes for determining whether or not the start time is included may be performed. The order of each determination process is not particularly limited. In this way, uncertain data can be determined more accurately.

In the above embodiment, the communication device that transmits the probe data is embodied in the navigation device 10, but may be embodied in another communication device mounted on the vehicle C.
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.

  (A) In the traffic information processing system according to claim 1, the probe information acquisition means includes the probe information including an entry time when the vehicle enters the road section, and the probe includes an exit time when the road section leaves. The determination means calculates a required time of the road section of the vehicle to be determined based on the entry time and the exit time, and calculates a required time of the road section of the vehicle to be compared. The probe information transmitted from the determination target vehicle is excluded from the statistical target based on the difference between the required time of the determination target vehicle and the required time of the comparison target vehicle. Traffic information processing system.

  Therefore, according to the invention described in (a), the required time of the vehicle to be determined is compared with the required time of the vehicle to be compared, and the probe information is excluded from the statistical object according to the difference. Therefore, statistics can be performed using reliable information, and only uncertain information can be excluded.

The schematic diagram explaining a traffic information processing system. The block diagram explaining the hardware constitutions of a navigation apparatus. The conceptual diagram explaining the data structure of probe data. The block diagram explaining the hardware constitutions of a statistics server. The flowchart which shows the procedure at the time of transmitting probe data. The flowchart which shows the procedure of data statistics. The flowchart which shows the procedure of the noise removal process of 1st Embodiment. The conceptual diagram of the noise judgment area on the basis of a toll booth. The flowchart which shows the procedure of the noise removal process of 2nd Embodiment. The conceptual diagram which shows the procedure of the noise removal process of 2nd Embodiment. The flowchart which shows the procedure of the noise removal process of 3rd Embodiment. It is a conceptual diagram which shows the procedure of the noise removal process of 3rd Embodiment, (a) shows a determination object vehicle, (b) shows the movement time of a comparison object vehicle. The flowchart which shows the procedure of the noise removal process of another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Traffic information processing system, 2 ... Statistical server as traffic information processing system, 3 ... Relay apparatus which comprises traffic information processing system, 10 ... Navigation apparatus as vehicle-mounted apparatus, 11 ... Road area determination means, Probe information transmission means 20 as a probe information acquisition means, a computer as a determination means and a control means, 40 as probe data as probe information, 40D as a current time as time information, C as a vehicle, C1 as a determination target vehicle, C2 ...
Vehicle to be compared, R ... toll road, T ... toll gate, ΔT1, ΔT2 ... required time.

Claims (6)

In a traffic information processing system that statistics probe information including time information,
Probe information acquisition means for acquiring the probe information transmitted from an in-vehicle device of a vehicle traveling on a road section based on a toll gate of a toll road;
Based on the time information included in the probe information, it is determined whether the acquired probe information is information transmitted from a vehicle that has waited for the change time of the toll fee. A traffic information processing system comprising: a determination unit to be excluded. The traffic information processing system according to claim 1,
The probe information acquisition means includes
Obtain the probe information including the time information when passing the toll gate,
The determination means includes
A traffic information processing system, wherein the probe information is excluded from statistical objects when the time information indicates a time within a predetermined time since the change start time of the toll. The traffic information processing system according to claim 1,
The probe information acquisition means includes
Obtaining the probe information including the entry time of entering the road section, and the probe information including the exit time of leaving the road section;
The determination means includes
A traffic information processing system that excludes the probe information from a statistical object when a change start time of a toll is included between the entry time and the exit time. In an in-vehicle device that generates and transmits probe information,
Road segment determination means for determining whether the generated probe information is probe information belonging to a road segment based on a toll gate of a toll road;
It is determined whether or not the travel time indicated by the generated probe information corresponds to a toll change time, and when it is determined to correspond to a toll change time, the generated probe information is excluded from transmission targets. An in-vehicle device comprising probe information transmitting means. In a traffic information processing method for statistically analyzing the probe information, using a control means for acquiring probe information including time information,
The control means is
Information obtained by acquiring the probe information transmitted from an in-vehicle device of a vehicle traveling on a road section based on a toll gate of a toll road, and the acquired probe information transmitted from a vehicle waiting for a toll change time A traffic information processing method comprising: determining whether or not the probe information is based on the time information included in the probe information, and excluding the corresponding probe information from the statistical target. In a traffic information processing program for statistically analyzing the probe information, using a control means for acquiring probe information including time information,
The control means;
Probe information acquisition means for acquiring the probe information transmitted from an in-vehicle device of a vehicle traveling on a road section based on a toll gate of a toll road;
Based on the time information included in the probe information, it is determined whether the acquired probe information is information transmitted from a vehicle that has waited for the change time of the toll fee. A traffic information processing program which functions as a determination means to be excluded.

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