• 대한교통학회지
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• 제25권6호
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• pp.55-63
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• 2007

본 연구는 고속도로 교차점의 유형과 교통사고와의 관계를 다루고 있다. 본 연구의 목적은 교통사고가 교차점의 유형과 기하구조 설계요소에 따라 다르게 나타날 수 있다는 가설을 검증하는데 있다. 연구의 주요 결과는 다음과 같다. 첫째, JCT와 IC 그리고 트럼펫 IC와 기타 유형의 IC 간의 사고 비교는 의미를 갖지 못하지만, 트럼펫 IC의 네 가지 유형별 차이는 의미가 있는 것으로 분석되었다. 즉 BO 형태의 트럼펫 IC는 타 형태의 트럼펫 IC보다 월등히 많은 교통사고를 나타내고 있다. 둘째, 가설검정을 통해 본선과의 교차각은 가능한 직각으로 설계하고 연결로 교통량이 많지 않은 한 1차로로 설계하는 것이 바람직하다고 나타났다. 이러한 연구결과는 장래 고속도로의 설계에서 보다 안전한 인터체인지의 유형결정과 기하구조 설계에 반영될 수 있는 방향을 제시할 수 있을 것으로 기대된다. 도로 안전 측면에서 가능한 BO 형태의 인터체인지는 도입하지 않고, 교차각을 $90^{\circ}$가 되도록 설계하되, 인터체인지의 경우 연결로 교통량이 아주 많지 않다면 1차로로 설계하는 것이 바람직한 것으로 판단된다.

• 한국도로학회논문집
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• 제20권2호
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• pp.35-44
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• 2018

PURPOSES : The purpose of this research is to analyze the characteristics of panels that affect the evaluating results of riding quality and to evaluate the appropriateness of roughness management criteria based on ride comfort satisfaction. METHODS : In order to analyze the influence of panel characteristics of riding quality, 33 panels, consisting of civilians and experts, were selected. Also, considering the roughness distribution of the expressway, 35 sections with MRI ranging from 1.17 m/km to 4.65 m/km were selected. Each panel boarded a passenger car and evaluated the riding quality with grades from 0 to 10, and assessed whether it was satisfied or not. After removing outlier results using a box plot technique, 964 results were analyzed. An ANOVA was conducted to evaluate the effects of panel expertise, age, driving experience, vehicle ownership, and gender on the evaluation results. In addition, by using the receiver operating characteristics (ROC) curve, the MRI value, which can most accurately evaluate the satisfaction with riding quality, was derived. Then, the compatibility of MRI was evaluated using AUC as a criterion to assess whether the riding quality was satisfactory. RESULTS : Only the age of the panel participants were found to have an effect on the riding quality satisfaction. It was found that satisfaction with riding quality and MRI are strongly correlated. The satisfaction rate of roughness management criteria on new (MRI 1.6 m/km) and maintenance (MRI 3.0 m/km) expressways were 95% and 53%, respectively. As a result of evaluating the roughness management criteria by using the ROC curve, it was found that the accuracy of satisfaction was the highest at MRI 3.1-3.2 m/km. In addition, the AUC of the MRI was about 0.8, indicating that the MRI was an appropriate index for evaluating the riding quality satisfaction. CONCLUSIONS : Based on the results, the distribution of the panels' age should be considered when panel rating is conducted. From the results of the ROC curve, MRI of 3.0 m/km, which is a criterion of roughness management on maintenance expressways, is considered as appropriate.

• 한국도로학회논문집
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• 제17권3호
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• pp.85-95
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• 2015

PURPOSES : Recently, bonded concrete overlay has been used as an alternative solution in concrete pavement rehabilitation since its material properties are similar to those of the existing concrete pavements. Deteriorated concrete pavements need rapid rehabilitation in order to prevent traffic jams on Korean expressways. Moreover, speedy and effective repair methods are required. Therefore, the use of bonded concrete overlay with ultra-rapid hardening cement has increased in an effort to reopen promptly the expressways in Korea. However, mobile mixer is required for ultra-rapid hardening cement concrete mixing in the construction site. The use of mobile mixer causes various disadvantages aforementioned such as limitation of the construction supply, open-air storage of mixing materials, increase in construction cost, and etc. In this study, therefore, hydration accelerator in-situ mixing on polymer modified concrete produced in concrete plant is attempted in order to avoid the disadvantages of existing bonded concrete overlay method using ultra-rapid hardening cement. METHODS : Bonded concrete overlay materials using ultra-rapid hardening cement should be meet all the requirements including structural characteristics, compatibility, durability for field application. Therefore, This study aimed to evaluate the application of hydration accelerator in-situ mixing on polymer modified concrete by evaluating structural characteristics, compatibility, durability and economic efficiency for bonded concrete overlay. RESULTS : Test results of structural characteristics showed that the compressive, flexural strength and bond strength were exceed 21MPa, 3.15MPa and 1.4MPa, respectively, which are the target strengths of four hours age for the purpose of prompt traffic reopening. In addition, tests of compatibility, such as drying shrinkage, coefficient of thermal expansion and modulus of elasticity, and durability (chloride ions penetration resistance, freezing-thawing resistance, scaling resistance, abrasion resistance and crack resistance), showed that the hydration accelerator in-situ mixing on polymer modified concrete were satisfied the required criteria. CONCLUSIONS : It was known that the hydration accelerator in-situ mixing on polymer modified concrete overlay method was applicable for bonded concrete overlay and was a good alternative method to substitute the existing bonded concrete overlay method since structural characteristics, compatibility, durability were satisfied the criteria and its economic efficiency was excellent compare to the existing bonded concrete overlay methods.

• 대한교통학회지
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• 제27권5호
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• pp.85-95
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• 2009

지속적인 도로건설에도 불구하고 이용차량의 급증으로 인해 고속도로의 혼잡은 계속 커져 가고 있다. 이를 해결하기 위한 물리적 용량 확대 즉, 도로의 신설, 확장에는 막대한 비용뿐만 아니라 용지확보의 어려움 등으로 장기의 건설기간이 소요되어 혼잡 해소 시까지 상당기간 동안 혼잡의 지속이 불가피하다. 따라서 도로 관리주체는 소통상태가 악화되기 이전에 소통상태에 대한 지속적인 모니터링을 통해 혼잡원인 분석 및 해결대안을 제시하여 적극적으로 혼잡에 대처하는 것이 요구된다. 소통상태의 모니터링을 위해서는 소통상태를 계량적으로 표현할 수 있는 지표가 필요하다. 따라서 본 연구에서는 등급(또는 설계속도)이 다른 도로에 대해 동일한 척도로 평가가 가능하고 소통원활, 혼잡 등의 상태를 구분할 수 있는 혼잡지표(종합소통지수, TCI)를 개발하였다. 또한 개발된 종합소통지수(TCI)는 고속도로 교통관리시스템(FTMS)과 같이 기 설치된 시스템으로부터 획득 가능한 교통데이터를 이용하여 혼잡도를 산출할 수 있기 때문에 기존의 FTMS를 기능적으로 보완할 수 있고 도로 관리주체가 혼잡관리에 쉽게 적용할 수 있는 장점을 지닌다. 한편, TCI의 적용성을 평가하기 위해 경부 및 서해안 고속도로에 적용하여 평균통행속도, TTI 및 TCI 결과 값을 비교하였는데, 활용도, 소통상태 표현 능력 등의 측면에서 TCI의 적용성이 우수한 것으로 나타났다.

• 대한토목학회논문집
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• 제42권2호
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• pp.209-217
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• 2022

중앙 가변차로제는 비대칭적 중방향 교통류에 의한 혼잡을 완화하기 위한 효과적인 대안으로 평가되어 왔으나, 교통안전에 대한 문제로 국내에서는 점차 사라지고 있다. 이동식 중앙분리대 시스템은 교통안전 문제를 보완하기 위한 대안으로 활용될 수 있으며, 일시적 버스전용차로 운영과 결합하여 효율적으로 교통혼잡을 관리할 수 있을 것으로 평가된다. 본 연구는 도시고속도로 대상으로 이동식 중앙분리대 활용 버스전용차로 운영 전략에 대한 설정 절차 및 최적의 대안에 대한 평가 절차를 제안하고자 하였다. 이를 위해 서울시 한강변 서측 2개의 도시고속도로 대상 사례연구를 진행하였으며, 그 결과 오전 혼잡시간대 일시적 운영이 가장 효과적인 것으로 나타났다. 본 연구에서 제시된 결과는 향후 유사 시스템을 활용한 버스전용차로 운영 전략 수립의 기반이 될 것으로 기대된다.

• 한국ITS학회 논문지
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• 제21권1호
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• pp.105-122
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• 2022

최근 5년간 고속도로에서 발생한 사망 사고의 통계를 살펴보면, 고속도로 전체 사망자 중 갓길에서 발생한 사망자의 사망률이 약 3배 높은 것으로 나타났다. 이는 갓길 사고 발생 시 사고의 심각도가 매우 높다는 것을 보여주며, 갓길 차로 위반 차량을 단속하여 사고를 미연에 방지하는 것이 중요하다는 것을 시시한다. 이에 본 연구는 Faster R-CNN 기법을 활용하여 갓길 차로 위반 차량을 검출할 수 있는 방법을 제안하였다. Faster R-CNN 기법을 기반으로 차량을 탐지하고, 추가적인 판독 모듈을 구성하여 갓길 위반 여부를 판단하였다. 실험 및 평가를 위해 현실세계와 유사하게 상황을 재현할 수 있는 시뮬레이션 게임인 GTAV를 활용하였다. 이미지 형태의 학습데이터 1,800장과 평가데이터 800장을 가공 및 생성하였으며, ZFNet과 VGG16에서 Threshold 값의 변화에 따른 성능을 측정하였다. 그 결과 Threshold 0.8 기준 ZFNet 99.2%, Threshold 0.7 기준 VGG16 93.9%의 검출율을 보였고, 모델 별 평균 검출 속도는 ZFNet 0.0468초, VGG16 0.16초를 기록하여 ZFNet의 검출율이 약 7% 정도 높았으며, 검출 속도 또한 약 3.4배 빠름을 확인하였다. 이는 비교적 복잡하지 않은 네트워크에서도 입력 영상의 전처리 없이 빠른 속도로 갓길 차로 위반 차량의 검출이 가능함을 보여주며, 실제 영상자료 기반의 학습데이터셋을 충분히 확보한다면 지정 차로 위반 검출에 본 알고리즘을 활용할 수 있다는 것을 시사한다.

• 농업과학연구
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• 제38권1호
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• pp.153-162
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• 2011

This study analyzed the spatio-temporal change detection of land-use and urbanization in Yongin and Anseong regions, Kyunggi Province, using three Landsat-5 TM images for 1990, 1996, and 2000. Remote sensing (RS) and geographic information system (GIS) techniques were used for image classification and result analysis. Six land-use types were classified using supervised maximum likelihood classification. In the two study areas, the land-use changed significantly, especially the decrease of arable land and forest and increase of built-up area. Spatially, the urban expansion of Yongin region showed a spreading trend mainly along the national road and expressways. But in Anseong region the expansion showed 'urban sprawl phenomenon' with irregular shape like starfish. Temporally, the urban expansion showed disparity - the growth rates of urbanized area rose from the period 1990-1996 to 1996-2000 in both study areas. The increased built-up areas were converted mainly from paddy, dry vegetation, and forest.

• Asian Journal of Atmospheric Environment
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• 제9권4호
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• pp.272-279
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• 2015

The information about the dispersion and scavenging of traffic-related pollutants at the locations near busy expressways is very helpful to highway planners for developing better plans to reduce exposures to air pollution for people living as well as children attending schools and child care centers near roadways. The objective of the current study was to give information in the dispersion and scavenging of vehicle-derived pollutants at the region near a busy urban expressway by a combination of two different model calculations. The modified Gaussian dispersion model and the Lagrange type below-cloud scavenging model were applied to evaluate $NO_x$ dispersion and DEP (Diesel exhaust particles) wet removal, respectively. The highest $NO_x$ was marked 53.17 ppb within 20-30 meters from the target urban expressway during the heaviest traffic hours (08:00AM-09:00AM) and it was 2.8 times higher than that of really measured at a nearby ambient measuring station. The calculated DEP concentration in size-resolved raindrops showed a continuous decreasing with increasing raindrop size. Especially, a noticeable decrease was found between 0.2 mm and 1.0 mm raindrop diameter.

• 한국안전학회지
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• 제31권2호
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• pp.83-89
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• 2016

As the world's industrial development quickens, the highways and regional expressways have been expanding to serve the logistics and transportation needs of people. The burgeoning road construction has led to a growing interest in roadside installations. These must have reliable performance over long periods, reduced maintenance and high durability. Steel roadside barriers are prone to corrosion and other compromises to their functionality. Therefore, using high anti-corrosion steel material is now seen as a viable solution to this problem. Thus, the objective of this paper is to expand the scope of applications for high anti-corrosion steel material for roadside barriers. This paper assesses the impact safety such as structural performance, occupant protection performance and post-impact vehicular response performance by a simulation review on roadside barriers built with high strength anti-corrosion steel materials named as hot-dip zinc-aluminium-magnesium alloy-coated steel. The simulation test results for the roadside barriers built with high strength anti-corrosion steels with reduced sectional thickness meet the safety evaluation criteria, hence the proposed roadside barrier made by high strength and high anti-corrosion hot-dip zinc-aluminium-magnesium alloy-coated steel will be a good solution to serve safe impact performance as well as save maintenance cost.

• 한국항만경제학회지
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• 제17권2호
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• pp.1-28
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• 2001

Korea has been at the forefront of efforts to enhance international cooperation in transport and communications within Northeast Asia. This effort is driven not only by the benefits that could accrue to the Korean Peninsula but also to all nations in the region. Mutual cooperation within Northeast Asia would reduce transport and communications costs and provide the basis for a regional transport and logistics network. Before progress can be made towards an integrated transport and communications system in Northeast Asia, however, there is a need to evaluate its prospects, outline a visionary plan, and detail a preferred strategy. The strategy to develop the Korean Peninsula as the gateway for Northeast Asia should harmonize with the region's common transport (and communications) policy The strategy adopted by South Korea is focused primarily on the development of an improved logistics infrastructure that would be extended to North Korea upon reunification. The seaport and airport developments In Korea will have to be supported by improved access to planned high-speed railways, expressways and freight distribution centers that, in turn, are to be integrated with new telecommunications and computer technologies. The benefits from these improvements will be lost unless existing government monopolies controlling seaport, airport, rail, road and expressway developments are commercialized to ensure that the price of transport reflects its actual cost. Technical harmonization between different modes should be promoted to facilitate efficient intermodal transport between the Korean Peninsula and the rest of Northeast Asia.