JP2006343814A - Traffic control system and on-vehicle device to transmit information to this system - Google Patents

Traffic control system and on-vehicle device to transmit information to this system Download PDF

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Publication number
JP2006343814A
JP2006343814A JP2005166699A JP2005166699A JP2006343814A JP 2006343814 A JP2006343814 A JP 2006343814A JP 2005166699 A JP2005166699 A JP 2005166699A JP 2005166699 A JP2005166699 A JP 2005166699A JP 2006343814 A JP2006343814 A JP 2006343814A
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vehicle
information
traffic
control system
traffic control
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Pending
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JP2005166699A
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Japanese (ja)
Inventor
Masatoshi Asada
昌利 浅田
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Sumitomo Electric Ind Ltd
住友電気工業株式会社
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Priority to JP2005166699A priority Critical patent/JP2006343814A/en
Publication of JP2006343814A publication Critical patent/JP2006343814A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To control signals over a wide range without disposing many vehicle sensors. <P>SOLUTION: A traffic control system comprises a reception unit (20) receiving information transmitted form a vehicle (1) to determine a traffic jam and positional information of the vehicle (1), a processing unit (21) generating control information of a traffic signal controller (2) on the basis of the received information for traffic jam determination and of the position information of the vehicle (1), and a transmission unit (31) transmitting the control information to the controller (2). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traffic control system and a vehicle-mounted device for transmitting information to the traffic control system.

The conventional traffic control system receives information such as the number of vehicles passing at the point where the vehicle detector is installed from the vehicle detector installed on the road, determines the traffic volume based on the information, The signal control of the traffic signal controller is optimized.
Information such as signal cycle length, split, and offset is used to control the traffic signal controller, and signal control optimization is performed by adjusting the value of these information according to the traffic volume. (See Patent Document 1).

However, the vehicle detector can only collect information at the point where it is installed. For this reason, in order to collect information at many points and perform more appropriate signal control, it is necessary to install a large number of vehicle detectors.
In general, vehicle detectors are installed only at points where traffic is relatively heavy and traffic congestion is expected.
For this reason, with a limited number of vehicle detectors, traffic congestion due to road construction due to expansion or change of the road network, sudden accident traffic congestion, etc. The generated traffic jam cannot be detected.
Therefore, it was necessary to install a large number of vehicle detectors in order to detect traffic jams due to road construction and traffic jams.

On the other hand, a probe car system or the like that provides information on traffic congestion by wirelessly transmitting information such as a vehicle position and a traveling speed to a center is known (see Patent Document 2). However, conventionally, information obtained from a probe car has not been used for traffic signal control.
JP 2003-331385 A Japanese Patent Laying-Open No. 2005-4467

As described above, conventionally, when collecting information over a wide area at many points, it is necessary to install a lot of vehicle detectors, and there is a problem that the installation cost becomes enormous. On the other hand, with a small number of vehicle detectors, Therefore, it was not possible to control the traffic signal controller accurately and over a wide area.
Therefore, an object of the present invention is to enable signal control over a wide range without installing a large number of vehicle detectors.

  The present invention according to the traffic control system is based on the information for determining the traffic jam transmitted from the vehicle and the receiving unit for receiving the position information of the vehicle, the received information for determining the traffic jam and the position information of the vehicle, A processing unit that generates control information of the traffic signal controller and a transmission unit that transmits the control information to the traffic signal controller are provided.

  According to the traffic control system, since the processing unit can generate control information of the traffic signal controller based on the information transmitted from the vehicle, the traffic signal control can be performed even in an area where the vehicle sensor is not installed. It can be performed.

It is preferable that the processing unit includes a traffic jam determination unit that obtains traffic jam information in a specific section of a road or at a specific point. The traffic jam judgment unit can discriminate in which specific section or specific point the traffic jam has occurred.
In addition, the processing unit is a traffic signal to which traffic information of a specific section of a road or a specific point is applied based on correspondence information of a traffic signal controller corresponding to a plurality of specific sections of the road or a plurality of specific points of the road. It is preferable to have a corresponding controller specifying unit that specifies the controller. The corresponding controller specifying unit knows which traffic signal controller should be controlled when a traffic jam occurs in a specific section or a specific point.
Then, the processing unit has a signal control unit that generates control information for the specified traffic signal controller based on the traffic congestion information within a specific section of the road or at a specific point. Control information can be generated.

  The information for determining the traffic jam transmitted from the vehicle to the traffic control system is at least one of the speed of the vehicle, the acceleration of the vehicle, the distance between other vehicles, and the information determined regarding the traffic jam in the vehicle. Is preferably included.

A first aspect of the present invention relating to an on-vehicle device is an on-vehicle device capable of transmitting information for determining a traffic jam and position information of the vehicle to the traffic control system, wherein the vehicle speed, the acceleration of the vehicle, and other vehicles Based on vehicle information such as the inter-vehicle distance, and a vehicle-side traffic jam judgment unit that judges traffic jam at the position where the vehicle is present, and the traffic information judged by the vehicle-side traffic jam judgment unit to the traffic control system It can be sent.
According to the first aspect of the present invention relating to the vehicle-mounted device, since the vehicle-mounted device includes the vehicle-side traffic jam determination unit and can transmit the traffic jam information to the traffic control system, the traffic control system uses the traffic jam information. Judgment of traffic congestion can be made and the burden on the traffic control system side can be reduced.

  Further, the second aspect of the present invention relating to the vehicle-mounted device is an on-vehicle device capable of transmitting information for determining a traffic jam and position information of the vehicle to the traffic control system, wherein the vehicle position information is acquired. Information acquisition unit, traffic control area determination unit that determines the traffic control area in which the vehicle exists based on the position information, and traffic control system that is responsible for the traffic control area determined by the traffic control area determination unit And a transmission unit for transmitting. By determining the traffic control area by the vehicle-mounted device, information can be transmitted to an appropriate traffic control system even if there are a plurality of traffic control systems.

According to the present invention relating to a traffic control system, traffic signal control can be performed even in an area where a vehicle detector is not installed.
According to the first aspect of the present invention relating to the on-vehicle device, in the traffic control system, it becomes possible to perform traffic jam determination using the traffic jam information determined by the on-vehicle device, and the burden on the traffic control system side can be reduced.
According to the second aspect of the present invention relating to the vehicle-mounted device, even if there are a plurality of traffic control systems, information can be transmitted to an appropriate traffic control system.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a system configuration including a peripheral configuration of a traffic control system 3 that controls the traffic signal controller 2 using information from the vehicle 1.
A vehicle-mounted device 4 is mounted on the vehicle 1. The vehicle-mounted device 4 includes a GPS receiving unit 5 as a position information acquisition unit of the vehicle. The GPS receiver 5 receives information such as time information as well as information on the latitude and longitude of the position where the vehicle 1 exists as position information from the GPS satellite 6.
The vehicle 1 includes a speed sensor 7, a G sensor (acceleration sensor) 8, and an inter-vehicle sensor 9. The vehicle 1 can obtain information on the speed of the vehicle, information on the acceleration of the vehicle, and information on the distance between the vehicles by using these sensors 7, 8, and 9.

  The vehicle-mounted device 4 includes a CPU and a storage unit such as a memory / hard disk, and various functions of the vehicle-mounted device to be described later are realized by the CPU executing a computer program recorded in the storage unit. Note that some or all of the various functions of the vehicle-mounted device 4 may be realized by hardware.

As shown in FIG. 2, the vehicle-mounted device 4 receives various information from the vehicle sensors 7, 8, 9 or a vehicle processing device (ECU: not shown), performs necessary processing, and is installed in the traffic control center. It is comprised so that it may transmit to the traffic control system 3 made.
Specifically, the vehicle-mounted device 4 includes a vehicle information processing unit 10 for collecting information on a vehicle on which the vehicle-mounted device 4 is mounted. Information received by the vehicle information processing unit 10 from the vehicle includes speed information, acceleration information, and inter-vehicle information.
Here, the speed information is the traveling speed of the vehicle on which the vehicle-mounted device 4 is mounted, and is collected from the speed sensor 7 or ECU of the vehicle on which the vehicle-mounted device 4 is mounted. The acceleration information is the acceleration of the vehicle on which the vehicle-mounted device is mounted, and is collected from the G sensor 8 or ECU of the vehicle on which the vehicle-mounted device 4 is mounted. The inter-vehicle information is an interval between other vehicles (front and rear vehicles) surrounding the vehicle on which the on-vehicle device is mounted, and is collected from the inter-vehicle sensor 9 or ECU of the vehicle on which the on-vehicle device 4 is mounted. is there.

The vehicle information processing unit 10 performs subsequent processing (traffic control area determination) on the speed information, acceleration information, and inter-vehicle information received from the vehicle and the position information received from the position information acquisition unit (GPS reception unit) 5. The data is converted to a data format that can be processed by the information collection processing unit 12 and the information collection processing unit 12, and the converted information is transferred to the traffic control area determination unit 11.
The traffic control area determination unit 11 calculates the position of the vehicle on which the vehicle-mounted device 4 is currently mounted based on the position information obtained from the position information acquisition unit 5. From this calculation result, the traffic control area responsible for the point where the vehicle on which the vehicle-mounted device 4 is mounted exists is determined.

A plurality of traffic control systems 3 are installed, and a traffic control area (region) in which each traffic control system 3 performs control for traffic control is determined in advance. The determination of the traffic control area is performed to identify in which traffic control system 3 the information transmitted from the vehicle-mounted device 4 should be used.
Specifically, the determination of the traffic control area is performed by referring to the traffic control area information database 13. The database 13 includes area position information that defines the range of each traffic control area for each of a plurality of traffic control areas. The traffic control area determination unit 11 collates the calculated vehicle position with the position information in the database 13 to acquire the traffic control area information of the point where the vehicle exists. The traffic control area information is information that identifies a traffic control system that is responsible for the area.

The information collection processing unit 12 receives information such as vehicle information, position information, time information, and traffic control area information, and performs necessary processing on the information. In addition, the information processing collection unit includes a vehicle-side congestion determination unit 14 that determines whether the vehicle on which the vehicle-mounted device 4 is mounted is in a congestion state based on vehicle information such as speed information, acceleration information, and inter-vehicle information. ing.
The vehicle-side traffic jam determination unit 14 determines that the vehicle is in a traffic jam state when a state where the speed is low, the acceleration is small, or the inter-vehicle distance is small is continued for a predetermined time, and the determination result is determined by the vehicle traffic jam. It is generated as vehicle traffic jam information determined with respect to.

The information collection processing unit 12 converts the vehicle traffic jam information into a data format that can be received by the traffic control system together with vehicle information, position information, time information, traffic control area information, individual user ID, vehicle type information, and the like. The information is transferred to the transmission unit (interface) 15.
The transmission unit 15 periodically transmits these pieces of information to the traffic control system 3. Note that the traffic control area information is used as destination identification information in the transmitted information, and the traffic control system 3 is configured to receive information that is addressed to itself. Therefore, the vehicle-mounted device 4 can transmit information to the appropriate traffic control system 3.
The individual user ID and vehicle type information (large vehicle, medium size vehicle, small vehicle, special vehicle, etc.) are registered in advance in the storage unit (not shown) of the vehicle-mounted device 4, but are stored in the storage unit of the vehicle ECU. The vehicle-mounted device 4 may be registered and acquired from the ECU.
Moreover, the onboard equipment 4 does not need to have the function to determine a traffic control area. For example, if a traffic control area is determined based on position information among information received from the vehicle-mounted device 4 and a system having a function of transmitting information from the vehicle-mounted device 4 is installed in an appropriate traffic control system 3, The vehicle-mounted device 4 may not have a function of determining the traffic pipe area.

As shown in FIG. 4, the traffic control system 3 has an in-vehicle device information receiving unit 20 and receives information transmitted from the in-vehicle device 4. The received information is given to the processing unit 21 to be processed and stored in the storage database 22. The information stored in the storage database can be searched and viewed later.
The processing unit 21 performs processing for controlling the traffic signal controller based on information received from the vehicle-mounted device 4, and includes a position information recognition unit 24, a simple traffic jam determination unit 25, a traffic jam determination unit 26, and optimization. A traffic signal controller specifying unit 27 and a signal control unit 28 to be controlled are provided.
The position information recognizing unit 24 calculates the number of vehicles existing in the traffic control area of the traffic control system 3 at that time based on the position information and time information among the information received from the vehicle-mounted device 4. The calculation of the number of vehicles existing in each of a plurality of monitoring areas (specific sections) in the traffic control area is performed.
When roads exist in a grid pattern as shown by solid lines in FIG. 4 in the traffic control area, the main intersections where traffic signals exist are nodes N1 to N8, and individual roads connecting the intersections (nodes) N1 to N8. Can be expressed as links A1 to A21 (see dotted lines in FIG. 4).

  The monitoring area (specific section) is an area obtained by subdividing a traffic control area into a plurality of areas, and corresponds to each of the links A1 to A21. FIG. 5 represents the road in FIG. 4 with nodes N1 to N8 and links A1 to A21. The traffic control system 3 holds the node / link information database 29 shown in FIG. The node / link information database 29 has monitoring area position information that defines the range of the monitoring area for each monitoring area (link).

  The position information recognition unit 24 refers to the node / link information database 29 based on the position information received from the vehicle-mounted device 4, and collates the position information received from the vehicle-mounted device 4 with the monitoring area position information of the database 29. It is possible to determine in which monitoring area the vehicle exists. Based on this result, the position information recognition unit 24 obtains the number of vehicles and / or the time transition of the number of vehicles present in each monitoring area.

The simple traffic jam determination unit 25 recognizes vehicle traffic jam information among the information received from the vehicle-mounted device 4. If the vehicle congestion information indicates “congestion”, it is possible to easily determine the possibility of congestion in the monitoring area where the vehicle recognized by the position information recognition unit 24 exists.
Although accurate traffic determination is performed by the traffic determination unit 26, as described later, traffic determination by the traffic determination unit 26 is performed by processing information transmitted from the vehicle-mounted device 4 of many vehicles. It takes a relatively long time to judge traffic jams.
On the other hand, in the simple traffic jam determination unit 25, there is a risk that the vehicle is judged to be traffic jam even when the vehicle is stopped due to parking on the road, for example, information from one or a small number of vehicles. Since it can be determined, it is possible to quickly determine the traffic jam and to quickly optimize the control of the traffic signal controller.

In the traffic jam determination unit 26, based on position information, time information, speed information, acceleration information, inter-vehicle information, etc., among the information received from the vehicle-mounted device 4, the occupation rate of the road in any monitoring area, the presence or absence of traffic jams, Also, obtain traffic information such as the degree of traffic congestion or predict traffic congestion. Specifically, the traffic congestion determination unit 26 can calculate the road occupation ratio based on the number of vehicles in a certain monitoring area A1. Further, the traffic jam determination unit 26 can determine that the monitoring area A1 is congested if there are many slow speed vehicles or vehicles with a small inter-vehicle distance in a certain monitoring area A1, and the degree of traffic jam (congestion length) is also determined. It can be calculated. The traffic jam determination unit 26 can also determine where the traffic jam occurs in the monitoring area A1 based on the position information of the vehicle.
Further, even if the monitoring area A10 upstream of the monitoring area A1 is not currently congested, if the monitoring area A1 downstream is currently congested and there are more vehicles entering than the number of vehicles exiting from the monitoring area A1, a traffic jam determining unit No. 26, the upstream monitoring area A1 can also be predicted to become a future traffic jam, and the future traffic jam degree can also be calculated.
In addition, when the monitoring area is not divided according to the traveling direction of the vehicle, the congestion determination unit 26 obtains the traveling direction of the vehicle from the vehicle position information and the time information, and performs the congestion determination according to the traveling direction of the monitoring area.
In addition, the traffic jam determination unit 26 can also calculate the travel time from a specific point to another point according to the degree of traffic jam.

In the traffic signal controller identifying unit (corresponding controller identifying unit) 27 that is the optimization control target, the simple traffic jam determining unit 25 or the traffic jam determining unit 26 determines that traffic jam has occurred in a certain monitoring area A1. Then, when traffic congestion occurs in the monitoring area A1, processing for specifying a traffic signal controller to be controlled is performed.
The traffic signal controller is specified by referring to the monitoring area / control target database 30. This database 30 has correspondence information of traffic signal controllers that are subject to optimization control when a traffic jam occurs for each of a plurality of monitoring areas in the traffic control area. Therefore, the corresponding controller specifying unit 27 refers to the monitoring area / control target database 30 based on the information of the monitoring area A1 where the traffic jam has occurred, thereby determining one or more traffic signal controllers to be controlled. Can be identified.
In general, one or a plurality of traffic signal controllers on the downstream side in the vehicle traveling direction from the monitoring area where the traffic congestion has occurred are controlled.

In the signal control unit 28, parameter information (control such as cycle length, split, offset, etc. necessary for control of the target traffic signal controller based on the traffic jam information obtained by the simple traffic jam judgment unit 25 or the traffic jam judgment unit 26. Information). Control information such as the cycle length generated by the signal control unit 28 is transmitted to the traffic signal controller 2 to be controlled by the traffic signal controller parameter transmission unit 31.
The signal control unit 28 can optimize the control of the traffic signal controller in order to adjust the cycle length and the like as appropriate in accordance with the presence or absence of traffic congestion in the monitoring area or the degree of traffic congestion.
The signal control unit 28 is also given information from a vehicle detector installed on the road, as in the conventional traffic control system. Information from the vehicle detection is received by the vehicle detector information receiving unit 32 and given to the signal control unit 28.
Here, since the information from the vehicle and the information from the vehicle detection are the same type of information, the signal control unit 28 can perform processing based on both the information from the vehicle and the information from the vehicle detector. .

Therefore, according to the traffic control system 3, the degree of congestion can be determined based on information from the vehicle even in an area where the vehicle detector is not installed. Even in a region where the vehicle detector is installed, the accuracy can be improved as compared with the control based only on the information from the vehicle detector.
Therefore, it is possible to optimize the traffic signal controller in a wider range than before, and it is not necessary to newly install a vehicle detector, so that it is possible to reduce the cost of new infrastructure development.

  In the above description, the monitoring area corresponds to the road between the intersections, but the monitoring area may be a narrower range or a wider range. Further, the traffic congestion monitoring target may be a specific point on the road instead of a monitoring area (specific section) having a certain area. When a specific point on the road is set as a traffic monitoring target, a virtual vehicle detector is installed at that point. In this case, if the traffic control system 3 generates information in the same format as the information from the vehicle detector based on the information from the vehicle, the same processing as when the control from the vehicle sensor has been conventionally performed. It becomes easy to process by the method.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, the link node information database 29 possessed by the traffic control system may be provided in the vehicle-mounted device 4. When the in-vehicle device 4 is provided with the link node information database 29, the in-vehicle device 4 obtains a monitoring area (specific section) or a specific point and sends the monitoring area or specific point to the traffic control system 3 in response. The processing burden on the traffic control system 3 side is reduced.

It is a system configuration diagram including a peripheral configuration of a traffic control system. It is a control block diagram of onboard equipment. It is a control block diagram of a traffic control system. FIG. 4 is a correspondence diagram between a road network and node / link information. It is explanatory drawing of node link information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Traffic signal controller 3 Traffic control system 4 Onboard equipment 5 GPS receiving part (position information acquisition part)
11 Traffic Control Area Determination Unit 15 Transmission Unit 14 Vehicle-side Congestion Determination Unit 20 Onboard Device Information Reception Unit (Reception Unit)
21 Processing Unit 26 Congestion Judgment Unit 27 Optimizing Control Target Traffic Signal Controller Identification Unit (Corresponding Controller Identification Unit)
28 Signal Controller 31 Traffic Signal Controller Parameter Transmitter (Transmitter)

Claims (5)

  1. A receiver that receives information for determining a traffic jam transmitted from the vehicle and position information of the vehicle;
    A processing unit that generates control information of the traffic signal controller based on the received information for determining the traffic jam and the position information of the vehicle;
    A transmission unit for transmitting the control information to a traffic signal controller;
    A traffic control system characterized by comprising:
  2. The processor is
    A traffic jam determination unit for obtaining traffic information in a specific section of a road or at a specific point;
    Correspondence control for identifying a traffic signal controller to which traffic information of a specific section of a road or a specific point is applied based on correspondence information of a traffic signal controller corresponding to a plurality of specific sections of a road or a plurality of specific points of a road The machine identification part,
    A signal control unit that generates control information for a specified traffic signal controller based on traffic congestion information within a specific section of a road or at a specific point;
    The traffic control system according to claim 1, further comprising:
  3.   The information for determining the traffic jam includes at least one of a vehicle speed, a vehicle acceleration, an inter-vehicle distance from another vehicle, and information determined regarding a traffic jam in the vehicle. 2. The traffic control system according to 2.
  4. An on-vehicle device capable of transmitting information for determining a traffic jam and position information of the vehicle to the traffic control system according to claim 1,
    Based on vehicle information such as vehicle speed, vehicle acceleration, and inter-vehicle distance from other vehicles, a vehicle-side congestion determination unit that determines congestion at a position where the vehicle exists,
    A vehicle-mounted device capable of transmitting traffic information determined by the vehicle-side traffic determination unit to a traffic control system.
  5. An on-vehicle device capable of transmitting information for determining a traffic jam and position information of the vehicle to the traffic control system according to claim 1,
    A position information acquisition unit for acquiring position information of the vehicle;
    A traffic control area determination unit that determines a traffic control area in which the vehicle exists based on the position information;
    A transmission unit that transmits information to a traffic control system that is in charge of the traffic control area determined by the traffic control area determination unit;
    A vehicle-mounted device characterized by comprising:
JP2005166699A 2005-06-07 2005-06-07 Traffic control system and on-vehicle device to transmit information to this system Pending JP2006343814A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009146138A (en) * 2007-12-13 2009-07-02 Sumitomo Electric Ind Ltd Traffic signal controller, program, and method
JP2009245295A (en) * 2008-03-31 2009-10-22 Sumitomo Electric Ind Ltd Traffic signal control device and method, arrival profile estimation device and computer program
JP2009245294A (en) * 2008-03-31 2009-10-22 Sumitomo Electric Ind Ltd Traffic signal control device and method, arrival profile estimation device and computer program
JP2009252066A (en) * 2008-04-09 2009-10-29 Sumitomo Electric Ind Ltd Traffic signal controller, computer program, and traffic signal control method
JP2009252101A (en) * 2008-04-09 2009-10-29 Denso Corp Apparatus and program for controlling traffic signal in road construction section
WO2010026630A1 (en) * 2008-09-03 2010-03-11 富士通株式会社 Traffic flow control system and its method
JP2016062483A (en) * 2014-09-19 2016-04-25 パナソニックIpマネジメント株式会社 Traffic information generator and traffic information generation method
WO2017033799A1 (en) * 2015-08-26 2017-03-02 京セラ株式会社 Wireless communication device and network side device
WO2019012832A1 (en) * 2017-07-12 2019-01-17 パナソニックIpマネジメント株式会社 Traffic management device, traffic management system, and traffic management method
US10536829B2 (en) 2015-08-26 2020-01-14 Kyocera Corporation Radio communication apparatus and network-side apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009146138A (en) * 2007-12-13 2009-07-02 Sumitomo Electric Ind Ltd Traffic signal controller, program, and method
JP2009245295A (en) * 2008-03-31 2009-10-22 Sumitomo Electric Ind Ltd Traffic signal control device and method, arrival profile estimation device and computer program
JP2009245294A (en) * 2008-03-31 2009-10-22 Sumitomo Electric Ind Ltd Traffic signal control device and method, arrival profile estimation device and computer program
JP2009252066A (en) * 2008-04-09 2009-10-29 Sumitomo Electric Ind Ltd Traffic signal controller, computer program, and traffic signal control method
JP2009252101A (en) * 2008-04-09 2009-10-29 Denso Corp Apparatus and program for controlling traffic signal in road construction section
JP4539751B2 (en) * 2008-04-09 2010-09-08 株式会社デンソー Traffic congestion mitigation system with traffic light control device in construction section
US8130119B2 (en) 2008-04-09 2012-03-06 Denso Corporation Apparatus and program for controlling traffic signal in road construction section
WO2010026630A1 (en) * 2008-09-03 2010-03-11 富士通株式会社 Traffic flow control system and its method
JP2016062483A (en) * 2014-09-19 2016-04-25 パナソニックIpマネジメント株式会社 Traffic information generator and traffic information generation method
WO2017033799A1 (en) * 2015-08-26 2017-03-02 京セラ株式会社 Wireless communication device and network side device
US10536829B2 (en) 2015-08-26 2020-01-14 Kyocera Corporation Radio communication apparatus and network-side apparatus
WO2019012832A1 (en) * 2017-07-12 2019-01-17 パナソニックIpマネジメント株式会社 Traffic management device, traffic management system, and traffic management method

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