JP3708734B2 - Vehicle travel time calculation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle travel time calculation system that calculates a required time of a vehicle traveling on a toll road.
[0002]
[Prior art]
Conventionally, when calculating the required travel time of a vehicle, a vehicle detector is installed on the vehicle road or a license plate reader (hereinafter referred to as AVI) is installed to calculate the required time of the vehicle. It has been broken.
[0003]
Incidentally, in a system using a vehicle detector, the target section is divided into a plurality of unit sections in advance, and a vehicle detector is installed in each of these unit sections, and the traveling vehicle speed and each unit section measured from these vehicle detectors. The required travel time of each unit section is calculated from the distance between the two, and the required travel time of each unit section is summed to obtain the required time of the target section.
[0004]
[Problems to be solved by the invention]
However, among the vehicle time calculation systems as described above, the former system using the vehicle detector cannot calculate the required time with high accuracy unless the vehicle detectors are densely installed on the road. When the vehicle detectors are densely installed, the cost becomes very high.
[0005]
In addition, the required time calculation result by the vehicle detector is based on cross-sectional and indirect information, and is not actual running data, so there is a problem of lack of reliability.
[0006]
On the other hand, in the latter system using AVI, since the same vehicle is tracked while actually reading the number plate of the traveling vehicle, the actual traveling data is handled. However, the installation of AVI is more expensive than the vehicle detector. There is a problem.
[0007]
Furthermore, what can be said in common with both is the problem that the detection accuracy is greatly affected by the weather and traffic jams.
[0008]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicle required time calculation system that can reduce equipment costs and accurately calculate a required time regardless of weather and traffic jams.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides communication means for transmitting toll-related data associated with vehicle traffic obtained from a toll collection system installed at a toll booth on an expressway, and charges transmitted from the communication means Data extraction means for extracting data such as at least vehicle type, entrance IC, entrance time, exit IC, exit time, etc. necessary for calculating the required time of the vehicle from the related data, and specific reference data relating to the vehicle type of the motorcycle in advance stored, a specific data removing means for removing the extracted data relating motorcycle from the data extracted by said data extracting means with reference to the specific reference data, after removing the extraction data relating motorcycle in this specific data removal means IC required time calculation means for calculating the required time between both ICs from the extracted data, and both I calculated by this calculation means A vehicle required time calculation system provided with a target section required time calculating means for calculating the duration of the target section from the required time between.
[0010]
By taking the above measures, the present invention extracts the charge related data from the toll collection system already installed or newly installed in the toll gate of the expressway, and provides the vehicle required time calculation device serving as the host through the communication means. If it is transmitted, the data extraction means of the vehicle required time calculation device will include data necessary for calculating the required time of the vehicle from the charge related data, such as vehicle type, entrance IC, entrance time, exit IC, exit time, etc. Data is extracted and the time required for the vehicle in the target section is calculated, so the time required for the vehicle can be calculated without installing a vehicle detector or AVI, and the equipment cost can be greatly reduced. The vehicle required time can be calculated without being. Furthermore, provided the specificity data removal means, the extracted data relating not susceptible motorcycle effects of congestion from the extracted data is removed by the data extraction means, since the delivery to the required time calculating means between IC, the average of the actual running time reduction is Hakare, very it is possible to calculate the travel time between precise IC required time to target section.
[0011]
In another invention, when the actual traveling time of a vehicle traveling between both ICs is shorter than the legal time calculated by the distance between the two ICs and the legal speed, the actual traveling time of the vehicle is determined as the legal speed. Since the output is replaced with the required travel time corresponding to travel, the error of the vehicle travel time can be greatly reduced.
[0012]
Further, when calculating the required time between both ICs by the required time calculating means between the ICs, if the number of data samples between the two ICs is small, the required time data is obtained using the difference with the required time in the preceding and following sections. If the number of samples is increased by interpolation, the required time with high reliability can be calculated even when the number of data samples between the corresponding ICs is small.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a block diagram showing an embodiment of a vehicle required time calculation system according to the present invention.
[0016]
This system is based on a toll collection system 11 installed at an interchange of the expressway 10 and other vehicle entrances (hereinafter referred to as IC), and from the toll-related data sent from these toll collection systems 11,. It is comprised with the vehicle required time calculation apparatus 20 which calculates time.
[0017]
The toll collection system 11 is provided with communication means for reading the bill detail data from various vehicle pass cards and transmitting it to the vehicle required time calculation device 20 corresponding to the host system under the jurisdiction of each toll office.
[0018]
The vehicle required time calculation device 20 receives a fee detail data from each fee collection system 11 or transmits / receives a data request to each fee collection system 11 at a predetermined cycle, and this transmission / reception unit 21. The data required for calculating the required time of the vehicle, for example, the vehicle type, the entrance IC name, the entrance time, the exit IC name, the exit time, etc. are extracted from the fee detail data received by the Separately, the data extraction means 23 stored in the time-related data storage means 22 and the extracted data stored in the time-related data storage means 22 determine whether or not there is singular data. Specific data removing means 24 for removing data and data backup means 25 for performing data backup when the number of samples of data between both ICs is small. It has been kicked.
[0019]
Further, the vehicle required time calculation device 20 calculates the required time between the ICs by using either one or both of the data after the removal of the specific data and the data backup, or directly using the extracted data. Means 26, target section required time calculation means 27 for calculating the target section required time from both IC section required times calculated by the calculation means 26, and required time information obtained by the target section required time calculation means 27 are wired, Required time information providing means 28 provided to the vehicle 12, the lightning display board of the entrance / exit IC, the lightning display board 13 on the way of the road, and the like by radio or the like is provided.
[0020]
Next, the operation of the system as described above will be described.
[0021]
A toll collection system 11 is installed at each IC toll booth on the highway 10, and these toll collection systems 11 read the bill detail data from a vehicle pass card or the like when the vehicle passes, and are communication means built in its own system. To the vehicle required time calculation device 20 which is a host system under the jurisdiction of each toll gate.
[0022]
In the vehicle required time calculation device 20, the detailed bill data transmitted from each toll collection system 11,... Is received by the transmission / reception unit 21 and sent to the data extraction means 23. Since the data extraction means 23 includes a lot of data in the charge detail data received from each system 11, it is data necessary for calculating a predetermined vehicle required time from the data, for example, the vehicle Data such as type, entrance IC name, entrance time, exit IC name, exit time, and the like are extracted and stored in the time-related data storage means 22, for example, by car type.
[0023]
By the way, the data necessary for calculating the required time extracted by the data extraction means 23 includes data that is difficult to determine that the vehicle has traveled in a normal state. Data is sequentially read from the data storage means 22, the singular data is removed according to the singular reference data defined in advance, and is sent to the inter-IC required time calculation means 26.
[0024]
As means for removing the singular data, for example, the distance of the target section (AIC name-BIC name) is L (km) and the legal speed is V (legal). This is because the vehicle must comply with the legal speed and cannot provide the time required to travel at a speed exceeding the legal speed as information provision.
[0025]
Therefore, in such a case, as singular reference data,
T (legal) (minutes) = L · 60 / V (legal)
Is used.
[0026]
That is, the singular data removal unit 24 travels in a time shorter than T (legal) when T (real time) takes a certain time T (real time) as a result of a certain vehicle traveling between both ICs. By removing the travel time T (real time), and instead replacing the travel time of the vehicle that traveled in a time shorter than T (statutory) with the required time T (legal) that traveled at the legal speed The required time between both ICs.
[0027]
In addition, when traffic information is input on an expressway, the motorcycle can travel faster than a vehicle (four-wheeled vehicle) stuck in the traffic, so the extracted data of the vehicle type belonging to the motorcycle is excluded. In this case, the vehicle type belonging to the two-wheeled vehicle is the unique reference data.
[0028]
Further, some of the traveling vehicles may spend more time than originally required as a result of using the service area, the parking area, or the like. In addition, trouble cars and abnormally low speed cars also spend more time than originally required. Therefore, the data of these vehicles are removed using the following method, for example.
[0029]
For example, regarding the target data for each target section for each vehicle type, the travel time is classified into sections having a width of ΔT (minutes), and the frequency distribution is examined for each section. At this time, Otsu's threshold method and other cluster analysis are performed to extract mountains with high frequency and remove other data.
[0030]
As described above, the singular data removing unit 24 corrects the singular data in the extracted data, and if the singular data cannot be corrected, removes the corresponding data and considers it appropriate for calculating the required time. The extracted data is calculated by the inter-IC required time calculation means 26.
[0031]
However, although it is possible to calculate the required time between the ICs immediately after removing the specific data, it is also possible to use the following data backup means 25 in order to further improve the reliability of the extracted data.
[0032]
The data backup means 25 performs a process of increasing the number of samples by data interpolation when the number of data samples between a certain target IC is smaller than a predetermined number of samples. In general, on an expressway with a relatively small traffic volume, the number of data samples between target ICs is small, and it may be unreliable to calculate the required time.
[0033]
Therefore, in such a case, processing for increasing the number of samples is performed by data backup. Specifically, when the required time of the section (X → Y) is represented by Txy, when the points A, B, C, and D are arranged as shown in FIG. Using the difference, the time required for the section (A → B) can be interpolated as follows to increase the number of samples.
[0034]
Tab = (Tac−Tbc)
Tab = (Tad−Tbd) or {Tad− (Tbc + Tcd)}
...... Same below.
[0035]
As described above, the required time between vehicles is calculated by the required time calculation means 26 between ICs using the extracted data after removal of the singular data, and further the data after the data backup process including the interpolation data if necessary. To do. That is, the inter-IC required time calculation means 26 considers the extracted data after the removal of the singular data, and further the data after the data backup process, calculates the average value or median or mode of those data, and sets it as the IC section required time. .
[0036]
Further, the target section required time calculating unit 27 calculates the required time of the target section based on the inter-IC required time calculated by the inter-IC required time calculating unit 26. That is, the required time for the target section shown in FIG. 3 is calculated by adding the required time for each IC section.
[0037]
That is, when the target section is A → D, the target section required time calculating means 27
Tad = Tab + Tbc + Tcd
The required time in the A → D section is calculated and sent to the required time information providing means 28.
[0038]
The required time information providing means 28 provides the target section required time obtained by the target section required time calculating means 27 to the driver as required time information, and is one of important information among the information provided to the driver. One. The information calculated by the target section required time calculating means 27 needs to be provided to the driver in real time. For that purpose, the target section required time information is displayed in real time on the display board 13 on the expressway connected to the vehicle required time calculating device 20 online or on the IC entrance and the general road near the IC entrance. Furthermore, in addition to the display board, information may be provided by using VICS displayed on a car navigation, for example, an in-vehicle device of each vehicle by VICS or the like. Furthermore, it is also possible to output audio information from the radio by radio.
[0039]
Therefore, according to the embodiment as described above, data necessary for calculating the required time of the vehicle is extracted from the charge related data transmitted from the charge collection system installed at each tollgate, and this extraction is performed. Since the time required for the target section is calculated based on the data, there is no need to install a vehicle detector or AVI device in particular, and the equipment cost can be greatly reduced, and the time required for the vehicle can be accurately determined regardless of the weather and traffic jams. It can be calculated.
[0040]
If data such as vehicle type, entrance IC, entrance time, exit IC, exit time, etc. are extracted from the charge-related data, not only the time required for vehicles between both ICs but also the time required for vehicles between these ICs. The time required for the target section can be easily calculated.
[0041]
Also, in the case of singular data such as abnormal low speed vehicles, long-time resting cars in service areas, parking areas, etc., the vehicle required time is calculated using the extracted data after removing the singular data, so the singular data The vehicle required time can be calculated with high accuracy without being dragged.
[0042]
Further, when the number of extracted data samples between two ICs is small, the time required between the corresponding ICs is obtained from the extracted data between the other ICs and interpolated to obtain reliable both ICs even if the number of samples is small. The required time can be obtained.
[0043]
In addition, the calculated target section time information is provided to display boards and vehicles installed at appropriate locations on the expressway by wire and wireless, so the driver can be informed of the required time for the target section quickly. The driver can drive the vehicle within the required time based on more accurate information.
[0044]
In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.
[0045]
【The invention's effect】
As described above, according to the present invention, the equipment cost can be greatly reduced, the required time can be accurately calculated without being influenced by the weather and traffic jams, and since the actual travel data is used, the vehicle travel requirement is highly reliable. Time can be calculated.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an embodiment of a vehicle required time calculation system according to the present invention.
FIG. 2 is an explanatory diagram for obtaining a required time between ICs.
FIG. 3 is an explanatory diagram for calculating a required time of a target section.
[Explanation of symbols]
11 ... Toll collection system 20 ... Vehicle required time calculating device 23 ... Data extracting means 24 ... Singular data removing means 25 ... Data backup means 26 ... Inter IC required time calculating means 27 ... Target section required time calculating means 28 ... Providing required time information means

Claims (3)

A communication means for transmitting toll-related data associated with vehicle traffic obtained from a toll collection system installed at a toll gate on an expressway;
Data extraction means for extracting data such as at least the vehicle type, entrance IC, entrance time, exit IC, exit time, etc. necessary for calculating the vehicle required time from the charge related data transmitted from the communication means;
Singular reference data relating to the type of motorcycle is stored in advance, and singular data removing means for removing the extracted data relating to the motorcycle from the data extracted by the data extracting means while referring to the singular reference data;
An inter-IC required time calculating means for calculating a required time between both ICs from the extracted data after the extraction data relating to the two-wheeled vehicle is removed by the specific data removing means;
A vehicle required time calculation system comprising target section required time calculation means for calculating the required time of the target section from the required time between both ICs calculated by the calculation means. In the vehicle required time calculation system according to claim 1,
When the actual travel time of a vehicle traveling between both ICs is shorter than the legal time calculated by the distance between the two ICs and the legal speed, the singular data removal means determines the actual travel time of the vehicle as the legal speed. A vehicle required time calculation system characterized in that the output is replaced with a travel required time corresponding to travel. In the vehicle required time calculation system according to claim 1,
When calculating the required time between both ICs by the IC required time calculating means, if the number of data samples between both ICs is small, the required time data is interpolated using the difference from the required time in the preceding and following sections. The vehicle time calculation system is characterized by increasing the number of samples.

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