WO2010098559A2 - Système et procédé de commande de signal de circulation - Google Patents

Système et procédé de commande de signal de circulation Download PDF

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Publication number
WO2010098559A2
WO2010098559A2 PCT/KR2010/001081 KR2010001081W WO2010098559A2 WO 2010098559 A2 WO2010098559 A2 WO 2010098559A2 KR 2010001081 W KR2010001081 W KR 2010001081W WO 2010098559 A2 WO2010098559 A2 WO 2010098559A2
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WO
WIPO (PCT)
Prior art keywords
traffic
vehicle
traffic signal
information
signal control
Prior art date
Application number
PCT/KR2010/001081
Other languages
English (en)
Other versions
WO2010098559A3 (fr
Inventor
Nam Pyo Suh
Soon Heung Chang
Dongho Cho
Woongsup Lee
Seyoung Yun
Sungyeop Pyun
Woochan Kim
Jung-Min Moon
Kisong Lee
Youngmin Kim
Youjun Choi
Sunjong Lee
Daejun Kang
Original Assignee
Korea Advanced Institute Of Science And Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020090067507A external-priority patent/KR101005192B1/ko
Application filed by Korea Advanced Institute Of Science And Technology filed Critical Korea Advanced Institute Of Science And Technology
Publication of WO2010098559A2 publication Critical patent/WO2010098559A2/fr
Publication of WO2010098559A3 publication Critical patent/WO2010098559A3/fr

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Definitions

  • the present invention relates to a traffic signal control system and method; and, more particularly, to a system and method for intelligently controlling traffic signals based on traffic information reflecting various traffic and road conditions.
  • directional controls of conflicting traffic flows at an intersection may be made in a programmed sequence based on historical data accumulated through repetitive signal cycles.
  • Such a history -based control system is incapable of handling presently erupted anomalous traffic conditions and fails to alleviate traffic congestions caused thereby.
  • GPS Global Positioning System
  • a traffic signal control system for controlling a traffic signal for one or a plurality of vehicles travelling on a road section, comprising: an under-road communications unit for providing each of said one or plurality of vehicles on the road section with location information; a vehicle communications unit, installed in or attached to said each vehicle, for determining a position of said each vehicle based on the location information to generate travel information including the ID and the position of said each vehicle; a road-periphery communications unit, installed in a vicinity of the road section, for receiving the travel information to generate traffic information including the number of said one or plurality of vehicles travelling on the road section based on the travel information; and a traffic signal control unit for receiving the traffic information to thereby control the traffic signal based on the traffic information.
  • a traffic signal control method for controlling a traffic signal for one or a plurality of vehicles travelling on a road section, comprising the steps of: providing each of said one or plurality of vehicles on the road section with location information; determining a position of said each vehicle based on the location information; acquiring travel information including the ID and the position of said each vehicle; generating traffic information including the number of said one or plurality of vehicles on the road section based on the travel information; and controlling the traffic signal based on the traffic information.
  • FIG. 1 shows a configuration of a traffic signal control system in accordance with an embodiment of the present invention and Fig. 2 is a schematic version thereof.
  • Fig. 3 presents a traffic signal control system of the present invention which operates to control traffic flows at an intersection.
  • FIGs. 4 and 5 illustrate traffic flows controlled by the traffic signal control system of
  • FIG. 3 embodying the inventive features of the present invention.
  • FIG. 6 provides a flowchart of an exemplary process which is performed in the traffic signal control unit of Fig. 3, in accordance with an embodiment of the present invention.
  • FIG. 1 shows a configuration of a traffic signal control system in accordance with an embodiment of the present invention and Fig. 2 is a schematic version thereof.
  • the traffic signal control system 100 includes an under- road communications unit 101, a vehicle communications unit 102, a road-periphery communications unit 103, and a traffic signal control unit 104, all of which are discussed in detail below.
  • the under-road communications unit 101 provides each vehicle
  • the under-road communications unit 101 may transmit the location information at a fixed time interval, regardless of the presence of a vehicle on the road section 122, or only when there is detected at least one vehicle passing over it.
  • the inventive traffic signal control system 100 may be employed in a variety of traffic systems. For instance, it may be integrated into an electromagnetic induction- powered electric vehicle system, an example of which can be found in U.S. Patent No. 5,669,470.
  • a power supply line may be embedded under the road section 122 along the mid-line of each lane on the road section 122 for supplying power to an electric vehicle travelling thereover.
  • the under-road communications unit 101 may include a magnetic inductor, which is operatively connected to the power supply line which supplies power to the electric vehicle through magnetic induction. By way of detecting a change in the magnetic inductance of the power supply line, it would be possible to determine whether or not an electric vehicle is passing over the under-road communications unit 101.
  • the under-road communications unit 101 may employ any one of the available magnetic and/or electric field communications techniques that may be suitable for transmitting the location information.
  • a pulse- width modulation technique may be used to transmit the location information.
  • a plurality of under-road communications units may be embedded under the road section 122 along the mid- line of each lane on the road section 122, or along one side-line of each lane. Needless to say, other types of arrangements of the under-road communications units may be also possible.
  • the vehicle communications unit 102 installed in or attached to each vehicle 112 receives the location information to determine the position of each vehicle 112, generates travel information including the position of each vehicle 112, and transmits the travel information to the road-periphery communications unit [24]
  • the vehicle communications unit 102 can determine the position of each vehicle 112 based on the location information received from the under-road communications unit 101, by way of, e.g., comparing the location information with map data stored in the vehicle communications unit 102.
  • the vehicle communications unit 102 generates the travel information which may include the ID, the position, and the travel speed of each vehicle 112. Further, in case each vehicle 112 is participating in a group-driving, by which it is meant a mode of driving engaged by a group of vehicles travelling in tandem on a road, while maintaining a safety distance therebetween, the travel information may include group- driving information, such as the group ID, the number of vehicles in the group, the ID of the leading vehicle in the group (i.e., the foremost vehicle in the travelling direction of the group), the average length of a vehicle in the group, the safety distance between two neighboring vehicles in the group, the speed of the group, and so on.
  • group- driving information such as the group ID, the number of vehicles in the group, the ID of the leading vehicle in the group (i.e., the foremost vehicle in the travelling direction of the group), the average length of a vehicle in the group, the safety distance between two neighboring vehicles in the group, the speed of the group, and so on.
  • the road-periphery communications unit 103 which may be installed in a vicinity of the road section 122, receives from the vehicle communications unit 102 the travel information of each vehicle 112, generates traffic information of the road section 122 based on the travel information and transmits the traffic information to the traffic signal control unit 104.
  • the traffic information may include information on: the number of vehicles on the road section 122; inter- vehicular separation time, indicating the time required for a vehicle to reach a present position of an immediately preceding vehicle; and group- driving preservation information, indicating the time required for all of the vehicles engaged in a group-driving to completely pass the road section 122.
  • the traffic volume information can be generated by way of counting the total number of vehicles currently on the road section 122.
  • travel information may include the ID of a vehicle on the road section 122.
  • the road-periphery communications unit 103 may count the number of vehicles per lane on the road section 122.
  • the road-periphery communications unit 103 may classify the traffic volume information into a plurality of traffic volume levels N q As the step size of the traffic volume levels is set to a smaller value, the traffic signal control unit 104 can reflect the current traffic condition of the road section 122 more accurately in controlling the traffic signals 105.
  • the inter- vehicular separation time information i.e., the time interval T mter vai required for a given vehicle to reach a present position, e.g., the end point of a road section, of an immediately preceding vehicle, can be obtained with the following equation (1): [30] L interval
  • X f is the X coordinate value of the preceding vehicle
  • Y f is the Y coordinate value of the preceding vehicle
  • Z f is the Z coordinate value of the preceding vehicle
  • X b is the X coordinate value of the given vehicle
  • Y b is the Y coordinate value of the given vehicle
  • Z b is the Z coordinate value of the given vehicle
  • V b is the speed of the given vehicle.
  • the traffic signal control unit 104 can assume that there would be no vehicle passing, e.g., the end point of the road section 122 within the next T 111 time interval; and, therefore, can control the traffic signals 105 accordingly, as will be described in detail later.
  • the group-driving information included in the travel information which is transmitted from the vehicle communications unit 102 installed in or attached to each of the vehicles engaged in a group-driving, includes the group ID, the number of vehicles in the group, the ID of the leading vehicle in the group, the average length of a vehicle in the group, the safety distance between two neighboring vehicles in the group, and the speed of the group, etc.
  • the road-periphery communications unit 103 may estimate the time T gn , ⁇ required for all of the group-driving vehicles to pass the end point of the road section 122, as given by the following equation (2): X ⁇ + ' r 1 ⁇ > group W/' ⁇ group?
  • N grO up is the number of vehicles in the group
  • L group is the average length of a vehicle in the group
  • D ⁇ p is the safety distance between two neighboring vehicles in the group
  • V group is the speed of the group.
  • the road-periphery communications unit 103 may provide the traffic signal control unit 104 with the traffic information periodically with a specified period T u As the time period T u is set to a smaller value, the traffic signal control unit 104 can reflect the current traffic conditions of the road section 122 more precisely in controlling the traffic signals 105.
  • the traffic signal control unit 104 receives the traffic information, which may include the traffic volume information, the inter- vehicular separation time information and the group-driving preservation information, from the road-periphery communications unit 103, and intelligently controls the traffic signals 105 connected thereto based on the traffic information.
  • the traffic signal control unit 104 may dynamically set the turn-on duration of the green light to be in proportion to the number of vehicles on the road section 122 based on the traffic volume information.
  • the traffic signal control unit 104 may flexibly control the turn-on duration of the green light, while overriding a history -based traffic signal control program.
  • the traffic signal control system of the present invention can be used for controlling the traffic signals 105a to 105d at an intersection 220 of bidirectional road sections 222a to 222d.
  • vehicles on each of the road sections 222a to 222d may be passing through or stopped before the intersection 220 depending on the status of the traffic signals 105a to 105d controlled by the traffic signal control unit 104.
  • the traffic signal control unit 104 may receive from road- periphery communications units 103a to 103d traffic information of the road sections 222a to 222d, respectively, to thereby intelligently control the traffic signals 105a to 105d.
  • the traffic signal control unit 104 may periodically receive the traffic information from the road-periphery communications units 103a to 103d at an interval of, e.g., the time period T u .
  • Figs. 4 and 5 illustrate traffic flows controlled by the traffic signal control system of
  • FIG. 3 embodying the inventive features of the present invention.
  • the traffic signals 105a to 105d may include eight green lights, each of which permits the forward movement of each of the traffic flows Tl to T8.
  • the traffic flow which is indicated by Tl shall be referred to as the first traffic flow Tl, and the green light allowing the first traffic flow Tl shall be called the first green light.
  • the other traffic flows T2 to T8 and their respective green lights shall be called in the like manner.
  • a traffic flow inhibition table as shown in Fig. 5 may be referenced, the table indicating which of the traffic flows should not be permitted simultaneously.
  • Fig. 6 provides a flowchart of an exemplary process which is performed in the traffic signal control unit of Fig. 3, in accordance with an embodiment of the present invention.
  • a program 400 may be executed at one or more central processors of the traffic signal control unit 104. Data may be read from and/or written into a memory of the traffic signal control unit 104 in the course of the program execution by the one or more central processors.
  • the traffic flow corresponding to the variable i is referred to as the i-th traffic flow, the green light allowing the i-th traffic flow as the i- th green light, and the turn-on duration of the i-th green light as the i-th turn-on duration.
  • the other variables j and k like designations shall be made. It is noted, referring again to Figs. 4 and 5, that both the first traffic flow Tl corresponding to the initial value of i and the second traffic flow T2 corresponding to the initial value of j can be permitted to move forward at the same time.
  • step S411 the i-th turn-on duration is determined based on the traffic information of the corresponding road section from which the i-th traffic flow terminates and the i- th green light is turned on for the determined i-th turn-on duration. Similarly, the j-th green light is turned on in step S421, as performed in parallel with the step S411.
  • step S412 it is decided whether the i-th turn-on duration has expired or not.
  • the i-th turn-on duration can be regulated based on the newly received traffic information in step S413. For example, if the inter- vehicular separation time information indicates that no vehicle is expected to travel along the i-th traffic flow for the period of T ⁇ the i-th green light may be turned off prematurely. As another example, the i-th turn-on duration may be properly adjusted, based on the traffic information including the group-driving preservation information, for maintaining the speed of the group-driving vehicles. Thereafter, the process returns to the step S412.
  • step S414 If the i-th turn-on duration time has lapsed, the i-th green light is turned off and it will be decided whether or not the k-th traffic flow is permitted while the j-th green light is kept turned on, in step S414. At this time, the traffic flow inhibition table as shown in Fig. 5 may be referenced. [56] If the j-th traffic flow and the k-th traffic flow are not permitted at the same time, the variable k is represented in modulo N arithmetic (i.e., k is set to the remainder of division of k by N), where N is the total number of the green lights, and then increased by one, in step S415. Thereafter, the process returns to the step S414.
  • modulo N arithmetic i.e., k is set to the remainder of division of k by N
  • step S416 If the k-th traffic flow is permitted while the j-th green light is still kept turned on, the variable i is set equal to the value of k and the variable k is then represented in modulo N arithmetic before it is increased by one, in step S416. Next, returning to the step S411, the i-th turn-on duration is determined and the i-th green light is turned on for the determined i-th turn-on duration, as mentioned above.
  • Steps S422 to S426 for the j-th green light may operate similarly.
  • steps S411 to S416 for the i-th green light and the steps S421 to S426 for the j-th green light may be performed in parallel.
  • both of the thread executing the steps S411 to S416 and the thread executing the steps S421 to S426 may run, sharing the variables i, j and k.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

L'invention concerne un système de commande de signal de circulation pour commander un signal de circulation pour un véhicule ou une pluralité de véhicules se déplaçant sur une section routière, comprenant : une unité de communication se trouvant sous la route et servant à fournir à chacun des véhicules de la pluralité de véhicules sur la section routière des informations d'emplacement; une unité de communication de véhicule, installée à bord de chacun desdits véhicules ou fixée à chacun de ceux-ci, permettant de déterminer une position de chacun desdits véhicules à partir des informations d'emplacement pour générer des informations de déplacement; une unité de communication se trouvant à la périphérie de la route, installée au voisinage de la section routière et permettant de recevoir les informations de déplacement afin de générer des informations de circulation; et une unité de commande de signal de circulation permettant de recevoir les informations de circulation et ainsi de commander le signal de circulation à partir des informations de circulation. Les informations de circulation peuvent inclure des informations de volume de circulation, des informations de temps de séparation entre les véhicules et des informations de préservation de conduite en groupe.
PCT/KR2010/001081 2009-02-26 2010-02-22 Système et procédé de commande de signal de circulation WO2010098559A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2009-0016572 2009-02-26
KR20090016572 2009-02-26
KR10-2009-0067507 2009-07-23
KR1020090067507A KR101005192B1 (ko) 2009-02-26 2009-07-23 교통신호 제어 시스템 및 방법

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WO2010098559A2 true WO2010098559A2 (fr) 2010-09-02
WO2010098559A3 WO2010098559A3 (fr) 2010-11-25

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122437A (zh) * 2011-04-01 2011-07-13 上海千年工程建设咨询有限公司 道路交通管理决策支持装置
CN102568196A (zh) * 2011-12-30 2012-07-11 中盟智能科技（苏州）有限公司 车检器检测信息共享的方法及装置
CN103646555A (zh) * 2013-11-22 2014-03-19 深圳卓智达时代通信有限公司 一种交通灯的控制方法及其系统
CN103730014A (zh) * 2013-10-29 2014-04-16 深圳市金溢科技有限公司 一种基于二义性路径识别系统的车流量统计方法及系统
CN104485003A (zh) * 2014-12-18 2015-04-01 武汉大学 一种基于管道模型的智能交通信号控制方法
CN105321358A (zh) * 2014-07-31 2016-02-10 段绍节 城市道路交叉路口与道路交通的智能网实时指挥系统
CN105489034A (zh) * 2015-09-21 2016-04-13 青岛智能产业技术研究院 一种干线完全交通控制系统及方法
CN105513375A (zh) * 2015-09-21 2016-04-20 青岛智能产业技术研究院 一种区域完全交通控制系统
CN105809986A (zh) * 2016-04-19 2016-07-27 苏州工业园区职业技术学院 一种基于图像识别控制的交通灯
WO2016147329A1 (fr) * 2015-03-18 2016-09-22 住友電気工業株式会社 Dispositif de fourniture d'informations, programme informatique, support de stockage et procédé de fourniture d'informations
CN106600989A (zh) * 2015-10-14 2017-04-26 张玉德 智能交通指挥控制系统

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KR20090008964A (ko) * 2007-07-19 2009-01-22 주식회사 디스엔지니어링 차량 수에 따른 교통 신호등 제어 장치

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000058895A (ko) * 2000-07-04 2000-10-05 정환도 유무선 통합 교통신호 제어시스템
US20040239552A1 (en) * 2003-06-02 2004-12-02 Samsung Electronics Co., Ltd Apparatus for detecting position information of a moving object
WO2006088916A2 (fr) * 2005-02-14 2006-08-24 Regents Of The University Of Minnesota Systeme de detection de position de vehicules utilisant des etiquettes routieres passives
KR20080049082A (ko) * 2005-09-30 2008-06-03 메시네트웍스, 인코포레이티드 지능형 교통정보 시스템 및 방법
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KR20090008964A (ko) * 2007-07-19 2009-01-22 주식회사 디스엔지니어링 차량 수에 따른 교통 신호등 제어 장치

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122437A (zh) * 2011-04-01 2011-07-13 上海千年工程建设咨询有限公司 道路交通管理决策支持装置
CN102568196A (zh) * 2011-12-30 2012-07-11 中盟智能科技（苏州）有限公司 车检器检测信息共享的方法及装置
CN103730014A (zh) * 2013-10-29 2014-04-16 深圳市金溢科技有限公司 一种基于二义性路径识别系统的车流量统计方法及系统
CN103730014B (zh) * 2013-10-29 2017-03-08 深圳市金溢科技股份有限公司 一种基于二义性路径识别系统的车流量统计方法及系统
CN103646555A (zh) * 2013-11-22 2014-03-19 深圳卓智达时代通信有限公司 一种交通灯的控制方法及其系统
CN105321358A (zh) * 2014-07-31 2016-02-10 段绍节 城市道路交叉路口与道路交通的智能网实时指挥系统
CN104485003A (zh) * 2014-12-18 2015-04-01 武汉大学 一种基于管道模型的智能交通信号控制方法
WO2016147329A1 (fr) * 2015-03-18 2016-09-22 住友電気工業株式会社 Dispositif de fourniture d'informations, programme informatique, support de stockage et procédé de fourniture d'informations
JPWO2016147329A1 (ja) * 2015-03-18 2017-12-28 住友電気工業株式会社 情報提供装置、コンピュータプログラム、記録媒体及び情報提供方法
CN105513375A (zh) * 2015-09-21 2016-04-20 青岛智能产业技术研究院 一种区域完全交通控制系统
CN105489034A (zh) * 2015-09-21 2016-04-13 青岛智能产业技术研究院 一种干线完全交通控制系统及方法
CN106600989A (zh) * 2015-10-14 2017-04-26 张玉德 智能交通指挥控制系统
CN105809986A (zh) * 2016-04-19 2016-07-27 苏州工业园区职业技术学院 一种基于图像识别控制的交通灯

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