차량 주행 특성을 이용한 지도 매칭에 대한 연구

이세환(Lee, Se-Hwan),이철기(Lee, Choul-Ki),윤일수(Yun, Ilsoo),김남선(Kim, Nam-Sun),강다미(Kang, Da-Mi) 한국도로학회 2015 한국도로학회논문집 Vol.17 No.5

PURPOSES : In link matching using vehicular trajectory in a car navigation system, it is technically difficult to match the location of the subject vehicle with a link on an electronic map in the vehicle on a grade separation highway segment consisting of an elevated highway and atgrade highway, because of the overlap of geometric lines of the two highways. This study was initiated to propose a link matching algorithm using the characteristics of vehicular movement of the subject vehicle. METHODS : The selected test site is the highway segment between Jeong-reung IC and Gil-eum IC where the Inner Circulation Road and Jeong-reung-ro run together. To evaluate the proposed algorithm, this study collected the raw packet data of vehicles that drove on the test site. In a simulation environment, link matching was performed using an existing algorithm as well as the proposed algorithm. RESULTS: It was clearly found that the characteristics of vehicular movements are different on the two highways. CONCLUSIONS: The proposed algorithm outperformed the existing algorithm.

운전면허시험 강화에 따른 교통안전 효과 분석 연구

이창민,이철기,이상수,윤일수,Lee, Chang Min,Lee, Choul Ki,Lee, Sang Soo,Yun, Ilsoo 한국ITS학회 2020 한국ITS학회논문지 Vol.19 No.5

2011년 운전면허시험 간소화 제도가 도입된 이후 변별력이 없어 교통안전에 미흡하다는 부정적인 견해가 많았다. 이에 2016년 12월 22일부터 개선된 운전면허시험이 도입되었고 현재까지 운영되고 있다. 따라서 본 연구는 개선된 운전면허시험이 도입된 이후 어떤 효과가 있었으며 무엇이 유효했는지 살펴보고자 교통안전 통계자료 분석, 체감도 조사를 수행하였다. 분석 결과, 현재 시험이 적정한 변별력을 갖췄다고 보여 지며, 과거보다 공정성 체감은 상당 수준 올라온 것으로 인식된다. 실효성 부문에서는 아직까지 운전자의 눈높이를 만족하지 못한 것으로 사료되며, 향후에는 보다 심도 있는 연구와 교통선진국 사례를 검토할 필요가 있다. After the driver test was simplified in 2011, there were criticisms of its inadequate level of safety standards. A new and improved test was adopted in December 2016. This study investigated the impact of the changes to the test on safety, and analyzed traffic safety statistics and sensory evaluations to determine the effect of the improved driving license test. The analysis concluded that the current test has a proper discrimination and that fairness has increased considerably. The analysis also identified measures that, once adopted, will improve the conduct of driver tests. In the future, it will be necessary to conduct more in-depth studies and to review cases of advanced countries.

무인교통단속장비 개선 및 구현

이상오,이철기,윤일수,Lee, Sang-O,Lee, Choul-Ki,Yun, Ilsoo 한국ITS학회 2022 한국ITS학회논문지 Vol.21 No.5

The thesis is automated traffic control equipment system aims to improve. Areas where improvement is needed about the existing automated traffic control equipment by applying the latest technology and to improve the things that can be derived. Reflecting the derived improvements, we intend to present a plan for the design and implementation of a new unmanned traffic control device. The main improvements were designed to change the housing material of the unmanned traffic control equipment, simplify the configuration of the equipment, reduce the weight of the equipment, and change the purpose of the software. In order to evaluate the objective performance of the improved unmanned traffic control equipment through this study, it was requested to a public certification authority. The reliability of the equipment was secured through KC certification and durability test. It is intended to present the feasibility of securing the marketability of the unmanned traffic control equipment by comparing and evaluating the construction period and installation cost with the existing unmanned traffic control equipment.

고령운전자 사고취약 도로형태 분석 및 개선방안 연구

김상옥,장일준,이철기,Kim, Sang-Ock,Chang, Il-Joon,Lee, Choul-Ki 한국ITS학회 2009 한국ITS학회논문지 Vol.8 No.6

Improvement of roadway environments to accommodate elderly drivers' declining driving capabilities are required. Currently, even the types of roadway designs vulnerable to elderly drivers have not been revealed in Korea. Thus, this study aims to analyze the types and vulnerabilities of the roadway designs that elderly drivers experience more accidents based on crash data of the Korean National Police Agency. This study has also reviewed foreign guidelines enhancing their safety on different roadway designs. Compared with normal drivers, elderly drivers tend to be more frequently involved in traffic accidents on intersections and vehicle-to-vehicle accidents on curved roadway segments. Assuming freeway interchanges are also risky sections, this study has also examined several methods to reduce elderly driver-related accidents on freeway ramp areas. 최근 급속한 고령운전자의 증가에 따라 고령운전자의 저하된 운전행태를 수용할 수 있는 도로환경 개선에 대한 노력이 시급하나 아직까지 고령운전자의 사고취약 도로형태에 대한 통계도 집계되지 않고 있는 실정이다. 이에 본 연구는 경찰청 사고통계자료를 이용하여 고령운전자가 사고에 취약한 도로형태 및 취약 정도를 분석하였으며 해외사례를 바탕으로 고령운전자 사고취약 도로형태별 개선 방안을 제시하였다. 국내 고령운전자는 비고령운전자 대비 교차로 사고, 곡선로에서의 차대차 사고 발생확률이 높은 것으로 나타났으나 곡선로 상 차대차 사고는 두 집단간 큰 차이를 보이지는 않았다. 또한 고속도로 인터체인지도 고령운전자 사고취약 도로 형태에 포함시켜 램프 부근에서의 사고감소방안을 살펴보았다.

분기형 다이아몬드 인터체인지 도입 방안에 관한 연구

서윤정 ( Seo Yoon-jung ),이철기 ( Lee Choul-ki ),이상수 ( Lee Sang-soo ),윤일수 ( Yun Ilsoo ) 한국도로교통공단 2017 교통안전연구 Vol.36 No.-

Recently, as the construction of high speed roads has been increased in Korea, the design of the interchange for smooth connection with existing roads has produced the important influence on the traffic operation. In the urban area, the three-dimensional diamond interchange is preferentially considered in oder to improve the mobility. However, the traditional diamond interchange may reduce traffic capacity and reduce traffic safety because it needs two adjacent at-grade intersections. In order to overcome the limitations of traditional Diamond Interchange, this study effort was initiated to introduce the concept of Diverging Diamond Interchange(DDI), which is recognized as a alternative intersection against the conventional diamond interchange in USA. In addition, the effects of DDI on the mobility and safety in Korea was verified using the VISSIM and SSAM model in depth.

무인교통단속장비를 이용한 교차로 꼬리물기 단속 가능성 연구

이호원,현철승,주두환,김동효,이철기,박대현,Lee, Ho-Won,Hyun, Cheol-Seung,Joo, Doo-Hwan,Kim, Dong-Hyo,Lee, Choul-Ki,Park, Dae-Hyun 한국ITS학회 2011 한국ITS학회논문지 Vol.10 No.6

꼬리물기는 교차로에 정체가 발생하면 녹색 현시라도 진입해서는 안 되는데 이를 무시하고 무리하게 진입, 신호가 바뀐 뒤 다른 방향의 차량흐름에 방해를 주는 행위이다. 인력에 의한 단속 방법은 한계가 있어 지속적으로 단속을 하기위해서는 대체 방안이 필요하다고 하겠다. 교차로에서의 꼬리물기 위반를 시스템을 통해 단속가능한 지 여부를 파악하기 위해 실제 현장에서 실험을 통해 평가를 수행하였다. 본 연구에서는 현재 운영 중인 신호위반 단속장비와 달리 위반 차량을 단속하는 시점을 교차로 진출부 횡단보도 부근에서 하였으며, 위반 차량을 역추적 방식으로 궤적을 추적하는 방식을 적용하였다. 현장 실험 결과 시스템에 다음과 같은 결론을 얻었다. 교차로 꼬리물기 위반 차량에 대한 단속 능력, 즉 위반차량 검지율 및 오검지율을 평가한 결과, 평균 검지율은 83.5%, 오단속률은 0.2, 오인식률 1.5%로 나타났다. 따라서 꼬리물기 위반 차량을 무인단속장비에 의해 단속을 할 수 있을 것으로 판단된다. Even if the traffic light is green, if vehicles enter a jammed intersection, they are violation of the law. The police is enforcing law as a part of a nation wide campaign. Because, using the camcorder, the police can not do enforcement the offending vehicle, there are other techniques. Our research group proposed automated photographic equipment enable to enforce moving violation in intersection. Using new license plate recognition technology and backtracking technology to trace the offending vehicle, once the system detects a violator, it records 8 wide pictures and 1picture from the front vehicle, showing it enter and proceed through the intersection. Field experimental results obtained in the system, the following conclusions. The three measures of effectiveness investigated were recognition rate 83.5, mis-match recognition rate 1.5%.

Wireless LAN(IEEE 802.11)에서 인증시간 단축을 위한 보안 메커니즘에 관한 연구

홍경식,서종수,고광용,정준하,이철기,Hong, Kyung-Sik,Seo, Jong-Soo,Ko, Kwang-Yong,Jung, Jun-Ha,Lee, Choul-Ki 한국ITS학회 2009 한국ITS학회논문지 Vol.8 No.6

무선랜을 ITS에 적용하기 위해서는 무선 구간 보안성 향상과 이동성 지원을 위한 빠른 접속이 요구된다. 그러나 IEEE 802.11i 보안 표준을 적용하는 경우 보안 강화를 위한 IEEE 802.1X 사용자 인증 및 4-Way handshake 과정을 수행함으로써 접속 지연이 발생하여 ITS에 그대로 적용하기에는 무리가 있다. 본 논문에서는 이러한 문제를 해결하기 위해 Key Table을 이용한 Password 인증 및 데이터 암호화 메커니즘을 제안하고, 성능 분석을 통해 검증하였다. Both security enhancement in wireless and fast access for mobility are required to employ wireless LAN in ITS (Intelligent Transportation Systems). However, for the case of employing IEEE 802.11i security standard, it is known that the user authentication procedure of IEEE 802.1x and 4-way handshake procedure for stronger security enforcement may not be suitable for ITS due to its large delay. In this paper, we propose fast authentication method to resolve the above authentication delay problem, and verify its performance via simulation analysis.

UTIS 정보를 이용한 돌발상황 신호운영 전략

강다미(KANG, Da Mi),허낙원(HEO, Nak Won),박상민(PARK, Sang Min),오영태(OH Young Tae),윤일수(YUN Il Soo),이철기(LEE Choul Ki) 대한교통학회 2014 대한교통학회 학술대회지 Vol.71 No.-

기상요소에 따른 부산지역 계절별 교통사고 변화와 예측에 관한 연구

이동인,이문철,유철환,이상구,이철기 한국환경과학회 2000 한국환경과학회지 Vol.9 No.6

The traffic accidents in large cities such as Pusan metropolitan city have been increased every year due to increasing of vehicles numbers as well as the gravitation of the population. In addition to the carelessness of drivers, many meteorological factors have a great influence on the traffic accidents. Especially, the number of traffic accidents is governed by precipitation, visibility, humidity, cloud amounts and temperature, etc. In this study, we have analyzed various data of meteorological factors from 1992 to 1997 and determined the standardized values for contributing to each traffic accident. Using the relationship between meteorological factors(visibility, precipitation, relative humidity and cloud amounts) and the total automobile mishaps, an experimental prediction formula for their traffic accident rates was seasonally obtained at Pusan city in 1997. Therefore, these prediction formulas at each meteorological factor may be used to predict the seasonal traffic accident numbers and contributed to estimate the variation of its value according to the weather condition in Pusan city.