• 한국ITS학회:학술대회논문집
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• 2003.11a
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• pp.52-55
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• 2003

• Journal of Korean Society of Transportation
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• v.23 no.3 s.81
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• pp.73-84
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• 2005

Highway design criteria are considering roadway safety and smooth driving maneuver. However, a certain highway alignment within design criteria often leads drivers to undesirable situation due to the differences between the original intention of design criteria and the unintended result of drivers' cognition. The differences between them often result in traffic accidents. In order to reduce accident process, highway safety facilities are installed on those roadway sections. However, the relationship between highway environments and human factors has not been deeply studied in Korea. In this study. vertical roadway sections are constructed with 3-D graphical tools. This vertical roadway sections are simulated on a driving simulator in order to identify the differences of drivers' cognition on different roadway environments. Based upon the collected data from the driving simulator, canonical correlation analysis and canonical discriminant analysis of quantification theory II have been performed in order to figure out impacting factors on the degree of roadway safety. Also, based upon quantification theory I. the relationship between roadway safety facilities and the degree of safety has been analyzed.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.14 no.3
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• pp.59-67
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• 2000

최근 경제성장과 더불어 자동차 보유대수는 '90년대부터 '98년까지 8년간 매년 15% 증가하여 3배에 달한 반면 도로는 총 연장이 매년 5.5% 증가하는데 그침으로써 급증하는 교통수요를 충족시키기에 크게 미흡하여 도로 환경이 열악한 실정으로 도로의 안전성 향상을 위한 종합적이고 체계적인 노력이 절실히 필요한 실정이다. 이에 따라 건설교통부에서는 쾌적하고 안전한 도로를 만들기 위한 노력의 일환으로 사고 많은 지점의 개선, 도로안전시설의 정비·확충 등 도로 교통의 안전성 향상을 위한 사업들을 지속적이고 체계적으로 추진하고 있으며, 금번에는 도로조명시설의 설치 및 관리에 관한 일반적 기술기준을 마련하게 되었습니다. 일선 실무자들이 이를 적극적으로 활용하여 도로 이용자들에게 보다 좋은 도로 환경을 제공함으로써 교통사고를 줄이고 원활한 교통 소통을 도모하는데 이바지할 수 있기를 바라며, 도로 조명시설에 관한 내용을 발췌하여 소개하고자 합니다.

• 한국도로학회지:도로
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• v.13 no.1
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• pp.14-21
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• 2011

• 전기의세계
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• v.18 no.3
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• pp.40-47
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• 1969

최근 도로시설은 점차 중요성을 띠게되었다. 특히 증대하는 교통사고에 대처하기 위하여 교통안전시설의 정비가 급선무인데 도로조명은 교통안전시설중 가장 중요한 것의 하나여서 도로이용자로 하여금 안전하고 상쾌한 통행을 하게한다. 도로조명은 도로조명의 설치에 의해서 차도및 보도의 도면상황을 밝게하고 또한 교차점, 횡단보도, 도로표식등 그외의 장애물을 정확하게 식별이 되게끔되어야한다. 또한 도로조명의 기준은 주로 도면의 Brightness와 그의 균제도에 의해서 결정되어지지마는 이의 기준은 종래의 관습과 휘도측정의 복잡성으로 인하여 일응조도로 환산해서 표현하고 있으며 충분한 조도를 필요로하는 동시에 도로상호간에 있어서 일관성을 필요로 한다. 구미제국에 있어서는 1965년 C.I.E.의 권고안에 의해서 연구실시단계에 있으며 일본에서는 도로조명에 관한 Jis를 개정하였으나 아직 한국에서는 기준은 커녕, 도로조명자체가 비합리적으로 시설되어지고 있어 우선 대구시에서 주요한 도로에 개시설된 도로조명에 대한 분석과 C.I.E.의 기준에 의한 합리적인 도로조명설계및 고속도로조명에 대한 고찰을 기하고자한다.

• International Journal of Highway Engineering
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• v.7 no.4 s.26
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• pp.185-202
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• 2005

In this research, to get over restrictions of a field expreiment, we modeled a planning road through the 3D Virtual Reality and achieved data about dynamic response related to sector fluctuation and about driver's visual behavior on testers' driving the Driving Simulator Car with Eye Camera. We made constant efforts to reduce the non-reality and side effect of Driving Simulator on maximizing the accord between motion reproduction and virtual reality based on data Driving Simulator's graphic module achieved by dynamic analysis module. Moreover, we achieved data of driver's natural visual behavior using Eye Camera(FaceLAB) that is able to make an expriment without such attaching equipments such as a helmet and lense. In this paper, to evaluate the level of road's safety, we grasp the meaning of the fluctuation of safety that drivers feel according to change of road geometric structure with methods of Driving Simulator and Eye Camera and investigate the relationship between road geometric structure and safety level. Through this process, we suggest the method to evaluate the road making drivers comfortable and pleasant from planning schemes.

• Journal of Korean Society of Transportation
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• v.21 no.4
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• pp.91-101
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• 2003

This study modeled 4-lane highway in three-dimensional virtual reality in order to overcome difficulties of field experiment. and the research subject was placed in a driving simulator. We survey the driver's cognitive characteristics to the alignment changes in the three-dimensional virtual reality highway. Especially, maximizing the identity of driving movements and virtual scenery on the basis of the data obtained by dynamic analysis module. we minimized simulator sickness for the graphic module of driving simulator. And we carried out cognitive evaluation on the basis of adjective words extracted by dictionary and the opinion of specialist. In this study LISREL model was used to detect the causal relation between geometry and safety in cognitive side, and found that geometric change affects the safety of drivers by static and dynamic road safety model in three-dimensional combined alignments. As the result, for constructing safety road. we consider drivers' cognitive characteristics as human factors in road design, and we think that they are very important factors to improve road safety.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.39 no.1
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• pp.105-114
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• 2019

Recently, the paradigm of road policy has been focused on user safety. Recently, the number of road facility improvement project has been continuously increased but the economic feasibility (B/C ratio) is insufficient. Therefore, it is necessary to select a reasonable road improvement project through accurate and objective analysis of the road safety evaluation. In this study, to develop a new road safety evaluation method, data were collected based on the current road safety evaluation method for 75 routes including national roads and provincial ones. Based on the collected data, problems were analyzed and utilized as the basic factors of the new road safety evaluation method. Therefore, in this study, traffic accidents were reflected as a general evaluation item by weighing to solve these problems, and the evaluation items were added from experiences and ideas of the local public officials. For each evaluation item, a reasonable weight was determined through AHP (Analytic Hierarchy Process) questionnaire evaluation with highway experts. In addition, the safety index was determined based on the evaluation criteria for each evaluation item. The criteria for evaluating the danger zone are determined by the overall safety index. Finally, the criteria for selection of road improvement projects based on the overall risk level were derived.

• International Journal of Highway Engineering
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• v.10 no.2
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• pp.135-143
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• 2008

According to the present highway design criteria, there are minimum standards which re ade from special design speeds. If some highways are satisfied the standards, it regards he highway as safety. In reality, however, most drivers drive a car at different speed compared with design speed. It is very dangerous for drivers especially at transition sections between curve and horizontal curve sections. Hence, this study calculated the rate of changing and horizontal acceleration at each section. Moreover, this study evaluated thesafety of design at curve transition sections and then calculated lateral acceleration and curve radii. This study found the minimum standards which are using as basic safety standards are not appropriate for measuring driver's safety.

• International Journal of Highway Engineering
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• v.10 no.1
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• pp.1-9
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• 2008

Five bases for of highways are sight distance, vehicle stability, driver comfort, drainage and aesthetics. Among these bases, the sight distance is the most critical one in the highway alignment design. It is certain that highways and drivers' observation actions are 3-dimensional in nature. But, the highway alignment design and the sight distance analysis have been performed on 2-dimensional planes because of various constraints and complexity of calculating 3-dimensional sight distance. The purpose of this study is to derive a model for determining exact available sight distance in 3-D combined horizontal and vertical alignments. Application of the model is illustrated using numerical examples. The proposed model should be useful in quantifying the criteria for 3-D highway alignments.