• 제어로봇시스템학회논문지
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• 제18권8호
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• pp.719-724
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• 2012

A traffic detection system is a device that collects traffic information around an intersection. Most existing traffic detection systems provide very limited traffic information for signal control due to the restriction of vehicle detection area. A signal control scheme determines the transition among signal phases and the time that a phase lasts for. However, the existing signal control scheme do not resolve the traffic congestion effectively since they use restricted traffic information. In this paper, a new traffic detection system with a zone division signal control scheme is proposed to provide correct and detail traffic information and decrease the vehicle's waiting time at the intersection. The traffic detection system obtains traffic information in a way of vehicle-to-roadside communication between vehicles and sensor network. A new signal control scheme is built to exploit the sufficient traffic information provided by the proposed traffic detection system efficiently. Simulation results show that the proposed signal control scheme has 121 % and 56 % lower waiting time and delay time of vehicles at an intersection than other fuzzy signal control scheme.

• 한국ITS학회 논문지
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• 제7권1호
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• pp.42-58
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• 2008

심각해지는 교통난을 효율적으로 해결하기 위한 목적으로 실시간 신호제어시스템의 도입이 점차 확산되고 있다. 실시간 신호제어시스템은 수집정보의 신뢰도 및 시스템의 기능성이 중요하다 할 수 있으나, 시스템 구축 후 이에 대한 평가체계가 미비하여 본래의 기능을 제대로 수행하지 못하는 경우가 많이 발생하고 있다. 본 연구는 실시간 신호제어시스템에 대해 수집정보의 신뢰도는 물론 시스템의 기능성 등에 대한 평가를 통해 신호제어시스템 운영 효율을 파악하고 확장 및 운영의 방향을 제시하고자 한다. 분석결과 낮은 신뢰도를 보이거나, 이에 따른 대기행렬 길이 예측, 주기길이 변화, 좌회전 감응제어 등 시스템 기능성에 문제가 있는 부분들이 있음을 알 수 있었다. 이를 해결하기 위해서는 지속적인 모니터링을 통한 효율적인 유지보수체계가 필요하다고 판단된다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제3권2호
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• pp.251-257
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• 2003

In this paper, we wish to construct a optimal traffic cycle using wire remote control. if police vehicle or ambulance suddenly enter the traffic Intersection, it will increase the traffic accident. In this paper, wireless traffic light use the radio traffic control signal and research about the hardware manufacture to check special detectors on urgency vehicles may safety and rapidly enter traffic intersection. Also, this paper present a traffic signal control conditions that analyzes different traffic intersection flows in cases of saturated flows, where the real traffic volume demand is large and the capacity constraints of bottlenecks have significant effects on the flow patterns. Through computer simulation this wireless traffic light has been proven to be much more safety and efficient than fixed traffic signal light which does not consider emergency vehicles for safety escort.

• 한국ITS학회 논문지
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• 제10권2호
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• pp.35-41
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• 2011

경찰청에서는 국내 교통문제를 해결하고 국제적 교통운영체계를 수립하기 위하여 "교통운영체계 선진화 방안"사업을 추진하고 있다. 본 연구는 교통운영체계 선진화 방안의 추진 효과를 분석하였으며, 그 결과 교통소통 및 교통안전측면에서 효과가 있는 것을 밝혔다. 그러나 정책에 대한 시민들의 낮은 인지도, 부적절한 현장적용 등으로 인한 교통사고의 위험 및 정체가중, 교차로 꼬리물기 위반행위 발생 등의 문제점들이 도출되었다. 현재 선진화 방안은 주로 직진우선신호, 비보호좌회전, 점멸신호 운영 등 교통신호운영 방법 개선을 위주로 추진되고 있는데, 향후 최종적으로 교통운영체계 선진화 모든 과제가 복합적으로 도입될 경우 현재 보다는 더 나은 효과를 기대할 수 있을 것이다.

• 한국자동차공학회논문집
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• 제14권5호
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• pp.84-92
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• 2006

Freeway Corridors consist of urban freeways and parallel arterials that drivers can use alternatively. Ramp metering in freeways and signal control in arterials are contemporary traffic control methods that have been developed and applied in order to improve traffic conditions of freeway corridors. However, most of the existing studies have focused on either optimal ramp metering in freeways, or progression signal strategies between arterial intersections. There have been no traffic control systems in Korea that integrates the freeway ramp metering and arterial signal control. The effective control strategies for freeway operations may cause negative effects on arterial traffic. On the other hand, traffic congestion and bottleneck phenomenon of arterials due to the increasing peak-hour travel demand and ineffective signal operation may generate an accessibility problem to freeway ramps. Thus, the main function of the freeway which is the through-traffic process has not been successful. The purpose of this study is to develop an integrated control model that connects freeway ramp metering systems and signal control systems in arterial intersections. And Optimization of integrated control model which consists of ramp metering and signal control is another purpose. Optimization results are verified by comparison with the results from MATDYMO.

• 한국자동차공학회논문집
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• 제15권1호
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• pp.8-15
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• 2007

Freeway corridors consist of urban freeways and parallel arterials that drivers can use alternatively. Ramp metering in freeways and signal control in arterials are contemporary traffic control methods that have been developed and applied in order to improve traffic conditions of freeway corridors. However, most of the existing studies have focused on either optimal ramp metering in freeways, or progression signal strategies between arterial intersections. There have been no traffic control systems in Korea that integrates the freeway ramp metering and arterial signal control. The effective control strategies for freeway operations may cause negative effects on arterial traffic. On the other hand, traffic congestion and bottleneck phenomenon of arterials due to the increasing peak-hour travel demand and ineffective signal operation may generate an accessibility problem to freeway ramps. Thus, the main function of the freeway which is the through-traffic process has not been successful. The purpose of this study is to develop an integrated control model that connects freeway ramp metering systems and signal control systems in arterial intersections. And Optimization of integrated control model which consists of ramp metering and signal control is another purpose. The design of experiment, neural network, and simulated annealing are used for optimization.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2003년도 추계학술대회 및 정기총회
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• pp.15-18
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• 2003

There are plenty of optimization models for the signal-system of a single intersection and area traffic. Some of those models are adopted for the real traffic signal control system. The simulators for a single crossroad have been developed, so that we could evaluate optimization models and traffic control systems. However, the simulators for the area traffic are still being developed. Therefore, there are many limitations in the analysis and evaluation for area traffic control systems. The area traffic is consist of several intersections interconnected which are very complicated and many traffic strategy are adopted for the control system. This paper features an effective area traffic control system by High Lever Architecture(HLA) which is a new developed simulation tool. In this paper, we discuss the design of HLA-based area traffic control simulation. We describe technical motivations for the HLA, the key elements of the architecture and how they are minimum and essential to the goal of reuse and interoperability.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 춘계학술대회 논문집
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• pp.82-88
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• 2005

There are plenty of optimization models for the signal-system of a single intersection and area traffic. Some of those models are adopted for the real traffic signal control system. The simulators for a single crossroad have been developed, so that we could evaluate optimization models and traffic control systems. However, the simulators for the area traffic are still being developed. Therefore, there are some limitations in the analysis and evaluation for area traffic control systems, The area traffic is consist of several intersections interconnected which are very complicated and many traffic strategy are adopted for the control system. This paper features an effective area traffic control system by High Lever Architecture(HLA) which is a new developed simulation tool. In this paper, we discuss the design of HLA-based area traffic control simulation. We describe technical motivations for the HLA, the key elements of the architecture and how they are minimum and essential to the goal of reuse and interoperability.

• 한국정보처리학회논문지
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• 제4권1호
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• pp.167-176
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• 1997

교차로에서 통행 패턴의 계속적인 변화와 교통량의 증가 때문에, 매시간 변화에 따라 교차로를 유연성있게 관리할 수 있는 효율적인 교통제어 시스템이 필요하다. 본 논문에서는 교차로를 구성하는 각 도로로 복합성을 자율적으로 분석하여 그 결과에 따라 교차로를 통과할 수 있는 시간을 결정하는 제어 시스템에 관해 연구하였다. 교 통신호 제어를 위해 퍼지 논리 제어기에 퍼지 개념을 적용하였으며, 퍼지 논리 제어 기의 최적 수행을 증명하기 위해서 규칙 신호 시스템을 비교하고 시뮬레이션을 통해 타당성을 증명하였다. 시뮬레이션 결과 교통 제어의 효율성이 6% 정도 향상되었다.

• 제어로봇시스템학회논문지
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• 제13권4호
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• pp.352-357
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• 2007

This paper deals with modeling method and application of Fuzzy Discrete Event System(FDES). FDES have characteristics which Crisp Discrete Event System(CDES) can't deals with and is constituted with the events that is determined by vague and uncertain judgement like biomedical or traffic control. We proposed Real-time Fuzzy Temporal Logic Framework(RFTLF) to model Fuzzy Discrete Event System. It combines Temporal Logic Framework with Fuzzy Theory. We represented the model of traffic signal systems for intersection to have the property of Fuzzy Discrete Event System with Real-time Fuzzy Temporal Logic Framework and designed a traffic signal controller for smooth traffic flow. Moreover, we proposed the method to find the minimum-time route to reach the desired destination with information obtained in each intersection. In order to evaluate the performance of Real-time Fuzzy Temporal Logic Framework model proposed in this paper, we simulated unit-time extension traffic signal controller model of the latest signal control method on the same condition.