고속도로 시설물별 차선반사도 다양성 연구

오흥운 한국도로학회 2005 한국도로학회논문집 Vol.7 No.4

Pavement markings delineate driver's sight and attentions at day and night. Retroreflectivities of the pavement markings are known to be affected by some factors such as geometrical characteristics of road sections, marking materials, traffic volumes, weather, and so on. Therefore, pavement markings would have different retroreflectivities place by place. The objective of this paper is to contend that there are rises and falls of retroreflectivity of specific geometrical characteristics of road section based on observed field data. For this purpose, retroreflectivities of yellow continued lines and white skip lines were measured on the freeway sections from Hanam to Nami interchanges. And then, the sections are categorized based on road geometric or facility types. From this study, it may be concluded that there exist considerably lower retroreflectivity trends of pavement markings at sharply curved sections, climbing lane sections, ramp sections, and tunnel sections than averaged retroreflectivity trends on freeway sections. This may leads to the necessity of differential pavement marking managements. 차선의 주요성능인 차선반사도는 도로의 기하구조 특성, 차선재료, 교통량, 일기, 환경요인등 다양한 요소에 의해 영향을 받게 된다. 그 결과 차선은 영향을 받은 정도에 따라 각기 다른 반사성능을 나타내게 된다. 본 논문은 공용중인 고속도로에서 차선의 반사성능 감소가 심할 것으로 예상되는 특정 기하구조 및 시설물 구간의 차선반사도 증감의 특성을 확인하여 밝히는 데 그 목적이 있다. 이를 통해 현행 최소차선반사도 기준과 비교하여 차선반사도의 기하구조 또는 시설물 구간에 따른 차별적 관리가 필요하다는 주장을 제시하고자 한다. 데이타 분석을 위해 중부고속도로 하남JCT-남이JCT 구간에서 황색실선, 백색점선의 차선반사도를 측정하였다. 이 측정치를 도로시설물 특이사항별로 구분하고, 각 구간에 대해 진입 전, 해당 구간, 통과 후로 구분하여 각각의 차선반사도를 비교 분석하였다. 분석결과 곡선구간, 오르막구간, IC램프구간, 터널구간에서 차선반사도가 상대적으로 낮게 측정되었다. 이로써 차선반사도의 기하구조 및 시설물 구간에 따른 차별적 적용 및 관리의 필요성을 제시하였다.

일교통량을 이용한 통행시간 신뢰도 평가

오흥운 대한토목학회 2023 대한토목학회논문집 Vol.43 No.5

본 논문은 일교통량을 이용한 통행시간 신뢰도 평가방법을 제시하고 있다. 희망속도의 도입, 일평균 통행속도와 일교통량간의 관계 설정, 구간별 통행시간편차를 대표값으로 결합하는 방법을 포함하고 있다. 지정체가 며칠 동안 지속되는 특성을 가진 고속도로 교통정보를 수집하였고, 이를 이용하여 일평균 통행속도와 일교통량과의 관계를 정립하였다. 구간별 통행시간 편차를 대표값으로 결합하는 방법인 PEM (Point estimate method) 기법을 활용하여 통계적 대표 특성을 추정하였다. 일평균 통행속도와 일교통량의 관계가 설정되었고, 일교통량이 LOS D나 F 이전인 LOS C 부근임에도 통행시간 신뢰도가 감소하기 시작하는 것이 나타났다. 일교통량만으로도 통행시간 신뢰도를 산출할 수 있게 되었고 통행시간 편차의 결합 방법이 표준화되었으므로 향후의 도로계획과 운영과정에서 통행시간 신뢰도가 용이하게 구해질 수 있을 것으로 기대된다. This paper is to introduce methodologies of travel time reliability evaluation using daily traffic volumes. The methodologies include desirable speed concept, the relation between averaged daily speeds and daily traffic volumes, the standardized way in integration of travel time deviations obtained from continuous highway sections. The study began with traffic data collection from a freeway line with long lasting congestion. And then, provided establishment of the relation between averaged daily speeds and daily traffic volumes, and usability of Point estimate method (PEM) to integrate travel time deviations of sections. Based on the relation between averaged daily speeds and daily traffic volumes, it is identified that travel time reliability begins to decrease around LOS (Level of Service) C even before LOS D or F. It may be concluded that travel time reliability could be evaluated based on daily traffic volumes in highway sections using standardized PEM. The methodologies introduced in the paper, could be useful in practicing evaluation of travel time reliability during the works of highway operation or highway planning.

신뢰도 기준에 근거한 도로설계 대안에 대한 교통안전성 평가

오흥운 한국안전학회 2010 한국안전학회지 Vol.25 No.6

It has been well known that traffic accidents occur under combined functional contributions of drivers, vehicles and road facilities, and that evaluation of safety levels for a specific road section or point is generally much complicated. Additionally, most of traffic accidents occur randomly implicating it is necessary to be evaluated in terms of probability theory. Thus, the evaluation model which reflects various characteristics and probabilistic distributions of traffic accidents has been necessary. The present paper provides a reliability based model with variables of probabilistic operating speeds and design speeds together which have been individually explaining associated characteristics in traffic accidents. Consequently, the model made it possible for speed management and road improvement projects to be evaluated in a common index. Application studies were performed in three cases. Through the studies, couples of facts were identified that the model successfully considered the probabilistic operating speeds and design speeds together and that then, the model evaluated road safety alternatives relatively which are complicatedly characterized and differently located

뉴노멀을 이해하고 적극적으로 대응해야

오흥운 한국도로학회 2020 도로 : 도로학회지 Vol.22 No.1

노면요철포장으로 인한 사고감소 효과

오흥운,장정화 한국도로학회 2007 한국도로학회논문집 Vol.9 No.4

There have been research and studies on rumble strip effectiveness in terms of accident reduction since rumble strips were first installed in 1950's. Research has shown that rumble strips reduce accidents from drowsy and inattentive driving. The present research statistically analyze the accident reduction effect of rumble strips based on accident reports obtained from rumble strip installed 377 places of nation wide freeway lines. Based on the results, rumble strips are effective in reducing accident frequencies 32.3%. The probable various factors inducing accidents are identified. These include drowsiness, speeding, inattentiveness, vehicle defectiveness, and short headways. It was found that rumble strips are effective in reducing A, B, C leveled accidents. and in reducing clear, cloudy, and rainy weather accidents. The results may make clear and expand probable types of accidents that rumble strips would reduce, then reduce the total accidents on freeway lines.

표준트럭의 차별적 적용 방안 연구

오흥운 한국도로학회 2006 한국도로학회논문집 Vol.8 No.1

The weight-to-power ratio of the standard truck for the climbing lane design is known to be 200lb/hp. The value was known to be assumed based on constant trucks' capability and regional distributions in stead of widely varied distributions region by region. Additionally, this value was assumed after investigating registered vehicles' statistics instead of investigating real portions of truck volumes. Therefore, it may be said that the value of the current standard truck does not reflect regional or industrial diversity and proportions of truck volumes. To resolve these issues, the present paper studies diversified standard trucks which consider regionally or industrially diversified and observed-volume based weigh-to-power ratios. For this purpose, individual trucks' weigh-to-power ratios obtained at toll-gates of national expressways were used. For regionally based study, the whole nation are divided into 8 regions, then each region is characterized by a unit of a weigh-to-power ratio. The applicability of each value is provided. Results show that the single value for the nationwide standard truck may be 208 lb/hp, 8 lb/hp higher than the current value of 200 lb/hp. Results also show that regional values ranged widely from 170 lb/hp to 230 lb, 30 lb/hp higher/lower than the current value. Conclusively, regional diversity of trucks' weigh-to-power ratios was identified then three types of standardized weigh-to-power ratios which may represent regional characteristics were suggested. As the diversified standard truck are applied to the design standard, two benefits are expected such as decrease of rear-end accident rates or decrease of climb lane construction costs.

신뢰도를 활용한 도로시설 교통안전성 평가기법

오흥운 한국도로학회 2016 한국도로학회논문집 Vol.18 No.4

PURPOSES: This paper proposes a reliability index for the safety evaluation of freeway sections. It establishes a reliability index as a safety surrogate on freeways considering speeds and speed dispersions. METHODS : We collated values of design elements including radii, curve lengths, vertical slopes (absolute values), superelevations, and vertical slopes from seven freeway sections in Korea. We also collected data about driving speeds, traffic accidents, and their deviations. We established a reliability index using these variables. RESULTS : The average radii, curve lengths, and superelevations are highly correlated with the incidence of traffic accidents. Deviations in radius and curve lengths show an especially high correlation. The reliability index, derived from speed and speed dispersions of the seven freeway sections, also correlated highly with accidents with a correlation index of 0.63. CONCLUSIONS : Since the reliability index obtained from speed and speed dispersions are highly correlated with traffic accidents, we conclude that a reliability index can be a safety surrogate on freeways considering speeds and speed dispersions together in terms of design and operational levels.

고속도로 인터체인지 이격거리와 주변 아파트 가격의 관계연구 (서울외곽순환고속도로 영향권을 중심으로)

오흥운,김태호 대한교통학회 2009 대한교통학회지 Vol.27 No.6

The present study is performed to identify the relationship between apartment prices and distances from freeway interchanges. To collect consistent data and to simplify the sphere of the influence, the Seoul beltway was selected as the target road. Two sides of the Seoul beltway such as the inner side and the outer side are partitioned following the whole beltway line. The maximum distance to be taken care of in data collection was 6.0km from freeway interchanges. Results show that there exist consistent patterns between apartment prices and distances from freeway interchanges. In detail, if the apartment is located on the sphere of the influence, it is shown that a) the prices are increased overall b) the prices are low at very near of interchanges c) the prices are increasing up to the points of about 2.0~4.0km from interchanges d) the prices are decreasing after the points. Additionally, it is shown the pattern observed was following approximately a quadratic curve which is different from the liner curve obtained from the similar study over the sphere of the influence in railway(Subway). 본 연구는 고속도로 인터체인지와 이격거리가 아파트 가격에 미치는 영향관계를 정의하기 위하여 수행하였으며, 국외 선행연구고찰을 바탕으로 연구방향을 설정하였다. 자료수집의 일관성을 확보하기 위하여 세력권을 단순화시키고자 서울외곽순환고속도로의 인터체인지 내측(서울지역)과 외측(경기지역) 주변 최대 6.0km까지의 아파트가격을 조사하였다. 서울외곽순환고속도로 전체를 대상으로 분석한 결과 고속도로 인터체인지의 거리에 따라 아파트가격이 일정한 추세로 분포함을 알 수 있었다. 구체적으로 고속도로 인터체인지 세력권 전체적 측면의 아파트의 가격은 a) 상승하나 b) 인터체인지 인접지역은 상대적으로 감소하며 c) 약 2.0~4.0km에 가장 높은 가격을 보이다 d) 그 이후 인터체인지와 멀어지면서 급격히 감소하는 것을 알 수 있었다. 또한 고속도로 인터체인지 이격거리와 아파트 가격의 추세는 기존 철도(지하철)의 역세권이 가지는 (-)의 1차 선형이었던 것과는 대비되게 2차 형태의 곡선(Polynomial Curve)과 유사한 것을 알 수 있었다.

교통사고와 차선반사도

오흥운,이현석,O, Heung-Un,Lee, Hyeok-Seok 한국도로학회 2003 도로포장공학회지 Vol.5 No.1

2030년 미래를 위한 약속; 지속가능한 도로와 우리학회

오흥운 한국도로학회 2023 한국도로학회지 Vol.25 No.1