• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.23 no.3
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• pp.293-301
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• 2005

In case of the roads that pass the mountain area, the cut sections or the tunnels are constructed. And In winter season it appears sunshine few in the specific segment, the shade is continued last and the freezing sections occur. So, the attention is necessary in traffic safety. This study was to evaluate the influence of sunshine and surface freezing sections expected in route plans of roads using GIS and makes alternative ideas in road stability security. After selecting 29 km sections of Donghae highway and creating a 3 dimensional terrain surface through the digital conversion of design plan data, it reflects the road alignment data of the same coordinates and a 3 dimensional road modeling is created. It set shadow time of road surface for the solar trace in the winter solstice in 20 minute interval. Shade areas are displayed and inputed in polygon data by manual vertorizing. Graphic and attribute data of this shade section is constructed in geodatabase of ArcCatalog. And it extracted the freezing section using intersect fuction of the GIS spatial analysis. By analyzing the winter meteorological data of temperature, rainfall, snowfall, humidity, and etc. and grasping dangerous freezing section of the road surface effectively, it will be able to make alternative ideas of the preliminary stability evaluation reflected in basic design.

• International Journal of Highway Engineering
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• v.12 no.1
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• pp.29-37
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• 2010

Porous pavements can provide road users with beneficial characteristics such as skid resistance and surface water drainage under rainy condition, and they cause less tire-road noise than conventional hot mix asphalt(HMA) pavements. However, voids of porous pavements are easily clogged by road debris at early stages, which leads to frequent maintenance works. Therefore, this study focused on the way of minimizing void clogging in porous pavements. During mixture design, the quantity of coarse aggregate has been increased to form many straight void conduits (SVCs) in porous HMAs. These SVCs were found to be effective resisting the void clogging problems. Four different porous HMAs(19mm, 13mm, 10mm, and 8mm) were developed and placed on highway roads. Their performances were validated with field tests during the past four years.

• International Journal of Highway Engineering
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• v.12 no.4
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• pp.131-137
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• 2010

The stormwater runoff from rest areas in highways are known as more polluted compared to highways because of more vehicle activities. This study is performed to find pollutant characteristics in the rest areas in the magnitude of statistical pollutant concentrations during storms. Washoff characteristics of pollutants from rest areas by monitoring of rainfall, runoff rate and runoff samples were evaluated. High concentrations of pollutants in runoff were observed at the beginning of runoff and rapid decrease thereafter, indicating that first-flush effects are clearly occurred. Event Mean Concentrations(EMCs) of TSS, COD, TN, and TP are estimated to be in the range of 31.04-127.11mg/L, 35.5-369.5mg/L, 2.62-9.86 mg/L, and 0.53-1.96mg/L, respectively. Heavy metals in runoff showed relatively high values, possibly due to the abrasion of brake pad or tire while cars are slowly moving for parking. EMCs of total Pb, total Cu, and total Ni are in the range of $1206-16293{\mu}g/L$, $237-7906{\mu}g/L$, and $53-6372{\mu}g/L$, respectively. Pollutant loading per rest area calculated by using EMC, flowrate and target area is also described for each pollutant.

• Journal of Korean Society of Forest Science
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• v.89 no.3
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• pp.397-404
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• 2000

This study was carried out to investigate the influence of the road structure and site conditions on side-ditch stability of forest road. For experimental purposes, the forest road in the Kwangrung Experimental Forest, Korea Forestry Research Institute, was chosen as a study site. A total of 556 plots wes set up as every longitudinal gradient changing points by belt-transect method. Data of 10 road structural characteristics and side-ditch stability were collected from each plot and analysed by Quantification II. The main factors in order of partial correlation coefficient were longitudinal gradient, road position, inclination of cut-slope, constituent material of cut-slopes, distance of surface flow, cross-sectional shape of road, pavement material, vegetation of cut-slopes and length of cut-slope. The erosion of side-ditch of forest road occurred in the following cases; more than 8% of the longitudinal gradient, road position of hill under side and foot hill, more than $50^{\circ}$ of inclination of cut-slope, constituent material of cut-slopes of hard soil and gravel soil, more than 80m of distance of surface flow, pavement material with earth or gravel, more than medium covered of vegetation of cut-slopes, and the straight and convex form of road-bed.

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.17 no.2
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• pp.4-9
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• 2013

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.51-52
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• 2007

• The tire
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• s.69
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• pp.12-16
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• 1977

타이어의 실노면상에서의 트랙션성능을 측정, 평가하는것은 자동차의 발진, 가속, 제동 및 시회성능의 점으로브터 중요하면 이것을 측정하기 위해서 타이어 트랙션시험차를 개발했다. 이시험차는 타이어의트랙션성능을 미끄럼율과제동, 구동계수의 관계, 횡화각과 사이드포오스계수, 어라이닝토루크의 관계로 측정되는 특장을 갖는다. 이시험차를 이용해서, 건조및 습윤아스팔트노상과 설노상에서의 트랙션성능에 대한 타이어트랫드의 기본적 페턴의영향을 측정한 결과, 다음과 같은 지견을 얻었다. (1)도로의 상태의 상위에 의한 타이어트랙션 성능은 건조상태에선 습윤상태보다 크며 노설상에선 전양자보다 훨씬 작다. (2)트랫드의 종방향의 구본수의 영향에 대해선 여하한 노면상태에서든 구본수가 증가한만큼 트랙션성능은 증가하나 어느구본수에선 포화하는 경향이 있다. (3)설노상에서의 트랫드의 구각도에 대해서는 구의각도가 타이어의 진행방향에 대해서 직각의 페턴이 좋다고 할 수 있다.

• Transactions of the Korean Society of Automotive Engineers
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• v.3 no.6
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• pp.154-161
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• 1995

There are several kinds of driving conditions according to the characteristic of each vehicle diver. Automaker produces vehicle strong enough to satisfy this several driving conditions at the point of vehicle durability. In order to develop the car in a short period, Automaker engineer tests vehicle at serveral accelerated durability test roads. Before testing the vehicle durability, test engineer must know how much this test road severe than general field road which is composed of high way, city road, paved road and unpaved road. This paper suggests two types of road severity test method that is using relative fatigue life prediction method and using absolute fatigue life prediction method, and also present the merits and demerits of two test methods.

• Journal of KSNVE
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• v.5 no.2
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• pp.153-157
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• 1995

1968년 경인고속도로를 시작으로 국내 도로환경이 변화하면서 교통소음이 주거환경에 문제로 제기되었으며, 80년대부터 시작된 포장재질의 콘크리트화 추세는 교통소음의 증가요인이 되었고, 신도시 고속도로 및 도시외곽 순환도로 등의 확충 사업은 주거환경 내에서도 교통소음을 발생시키고 있다. 이와 같이 도로교통소음은 주거환경의 쾌적성을 침해하는 가장 큰 요인으로 1993년 국내 환경오염 피해진정 건수중 소음.진동의 민원이 약 44%로 가장 높게 나타나고 있는 실정이며. 문제가 교통소음의 발생원은 자동차 발생소음(power level)은 각 음원별 소음특성을 검토 하는 것이 중요하나 소음의 평가방법에 대한 연구는 국내.외에서 각 음원별 특성을 포함한 연구로 1970년대 이후 급속히 전개되어 왔으나, 최근 도로변 건물의 고층화 현상은 방음(전파경로)대책 수립에 한계를 나타내고 있는 실정이다. 이와 같은 문제 점을 해결하기 위해서는 그동안 체계적인 연구가 이루어지지 않은 노면(포장)형태에 따른 자동차 주행소음의 특성에 관한 연구가 이루어져야 할 것으로 판단한다.

• Land and Housing Review
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• v.15 no.3
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• pp.165-175
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• 2024

As living standards improve, the demand for quiet and comfortable environments is increases. However, noise sources are rising due to population growth, urbanization, and industrialization. One solution to this problem is low-noise asphalt pavement, which has fewer installation regulations and can reduce noise at the source. Despite its advantages, there are few evaluation cases and no domestic guidelines for low-noise asphalt pavement. This study aims to evaluate the overall performance of low-noise asphalt pavement on roads in Seoul, focusing on average noise levels, skid resistance, and permeability. Noise measurements were conducted using a digital noise analyzer according to the Ministry of Environment's standards. Results indicated that noise reduction was maintained for 1 to 2 years but decreased over time. Skid resistance, assessed with the British Pendulum Tester, showed excellent performance with values above the standard of 57 in the initial stages after paving. Permeability, evaluated using the KS F 2394 method, was initially effective across all sections but declined over time.