• Journal of the Korean Society for Railway
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• v.18 no.2
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• pp.94-104
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• 2015

Trams are rail vehicles that run on tracks along public, urban streets; they also sometimes run on separate rights of way. Tram vehicles run more efficiently and their overall operating costs are lower than those of similar vehicles. In general, trams provide a higher capacity service than buses. However, when tram stops in the middle of the road do not have pedestrian refuges, trams can cause speed reductions for other transport modes (buses, cars), as in such configurations other traffic cannot pass whilst passengers are alighting from or boarding the tram. In this study we examined the qualifications of overseas tram operation. The Railway Safety Act, sub-laws, and other relevant laws were examined to determine complementary measures.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.239-240
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• 2019

본 논문에서는 유아보호를 위한 차량용 스마트 알림 시스템을 설치해야 한다는 것을 제안한다. 여름철 유아들이 차량에 갇혀 숨지는 안타까운 사건이 빈번히 일어났다. 현행 도로교통법에서는 어린이 통학버스를 운전하는 사람은 운행을 마친 후 어린이나 영유아가 모두 하차했는지를 확인 하도록 규정하고 있고 통학차량에 일정 인원 이상의 유아들이 탑승하면 통솔인원교사가 등.하교 길에 동행하도록 의무화 되어 있다. 그럼에도 불구하고 여전히 통학차량에 유아들이 방치되어 사망하는 사건사고가 일어나고 있다. 외국에는 챠량 내부의 모든 버튼을 인식 하여야 차량의 시동이 멈추게 된다. 하지만 유아를 차량에 두고 나오는 사고가 났다. 차량용 스마트 알림 시스템은 기존 버스 내부에 RF카드를 인식하면 유아의 학부모에게 문자가 전송되게 되며 차량 어디에 위치하였는지 표시가 되게 된다. 이로인해 차량에 유아를 두고 내리는 일이 없게 되며 유아가 차량을 언제 탑승하였는지 확인할 수 있게 된다.

• Journal of Navigation and Port Research
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• v.31 no.1 s.117
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• pp.107-113
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• 2007

This research addressed the problem of describing how the operating characteristics of passenger car and large vehicle differ qualitatively and quantitatively through the analysis of field survey data. A formulation that estimates passenger car equivalents used in this paper is derived by microscopic headway method. Regression analysis was used to focus on the effect of vehicle type on intervehicular spacings and the modeling technique for the statistical analysis was detailed.

• Environmental and Resource Economics Review
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• v.16 no.4
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• pp.873-900
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• 2007

Non-market valuation studies tend to assume that individual households have homogeneous preferences for a non-market good to value. However, since the preferences for non-market goods, especially environmental goods are more likely to be heterogeneous by nature, it may be more appropriate to assume heterogeneous preferences for non-market goods, which may in turn may lead to reduced biases in the WTP estimation. This study investigate the extent to which individual households have heterogeneous preferences for reduced concentrations of radon, a radioactive indoor air pollutant, for road safety, and for nuclear power safety. We also analyze the effect of heterogeneity assumption on the results of model and WTP estimation. Using the choice experiments and mixed logit models, we found that allowing for heterogeneous preferences improved model fitness and that there existed heterogeneous preferences for both reduced radon concentration and road safety, albeit not for nuclear power safety. The mean WTP for reduced radon concentrations and road safety increased by factors of 2.44 and l.74 respectively with the models allowing for heterogeneous preferences.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.29 no.3
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• pp.229-235
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• 2011

Traffic noise pollution is a growing problem that highly affects the health of people in urban areas. In order to implement effective measures against traffic noise the noise mapping about its distribution is imperative. Urban traffic noise maps will help to establish the existing baseline so that we will be able to look for the effective way to control the noise. They will also let us see in an understandable and visual way how noise spreads from roads into residential areas. In this paper we considered three development types between roads and residential areas, and applied the interpolation of ArcGIS for noise attenuation with distance from the roads to find the noise level at the parcels positions in residential areas, and then generated the noise map using the interpolated results. Therefore we present results that the traffic noise level within residential areas exceed the national noise standard and also can estimate the noise level of individual parcels. These results can be used for traffic noise control planning or assessment of officially assessed land price in near future.

• Journal of Korea Spatial Information System Society
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• v.9 no.1
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• pp.79-90
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• 2007

In this paper we proposed and implemented an incident detection model which combines fuzzy algorithm and traffic pattern in order to enhance the efficiency of incident detection for the highways with lamps. Most of the existing algorithms dealt with highways without lamps and can not be used for detecting incidents in the highways with lamps. The data used for model building are traffic volume, occupancy, and speed data. They have been collected by a loop sensor at 5 minutes interval at a point in the Internal Circular Highway of Seoul for the period of 3 months. In this model, the three parameters collected by sensor were fuzzified and combined with the daily traffic pattern of the link. The test of efficiency of the propsed model was performed by comparing the result of proposed model with traditional APID algorithm and fuzzy algorithm without the pattern data respectively. The result showed significant amount of improvement in reducing the false incident detection rate by 18%.

• Journal of Korean Society of Transportation
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• v.26 no.3
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• pp.17-29
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• 2008

A volume-delay function(VDF) has been used to describe the relation between traffic volumes and delay experienced by travelers on the roads traveling from origin to destination, which has been usually adopted in traffic assignment. For the purpose of more precise description of traffic pattern, we have to estimate the parameters of VDF in advance. This paper presents a methodology for estimating the parameters, which combined with golden section method. By using the method we have estimated the parameters with real data based on KTDB(2006), and validated them. Compared to the existing values of the parameters, newly estimated values are found to be closer to real world.

• Proceedings of the KOR-KST Conference
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• 1998.10a
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• pp.126-135
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• 1998

도로보수는 매우 고가의 사업으로서 정확한 분석이 필수적이라 할 수 있다. 따라서 본 연구에서는 수많은 대상구간의 도로파손에 대한 보수방법 및 보수우선순위를 정확하고 신속하게 결정하기 위해서 유전자 알고리즘(Genetic Algorithms)을 이용한 도로보수방법론을 개발하였다. 본 연구에서는 유전자 알고리즘의 주 분석기법인 교배연산, 돌연변이연산, 복제연산, 룰렛휠기법, 적합도함수등을 이용하였으며, 균열, 바퀴자국, 부스러짐, 플러쉬등의 4개 파손상태와 실코트, 덧씌우기, 팻칭, 재포장등의 4개 보수방법만을 분석대상으로 하였다. 또한 적합도의 판정을 위해서 각 구간의 보수효과, 자원요구량, 자원제약량을 이용하였으며, 이를 통해서 적절한 보수방법 및 보수우선순위를 결정하였다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.20 no.6
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• pp.264-279
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• 2021

Most automated vehicle evaluation scenarios are developed based on the typical driving situations that automated vehicles will face. However, various situations occur during actual driving, and sometimes complex judgments are required. This study is to define a situation that requires complex judgment for safer driving of an automated vehicle as a dilemma situation, and to suggest a driving strategy necessary to secure driving safety in each situation. To this end, we defined dilemma situations based on the automated vehicle ethics guidelines, the criteria for recognition of error rate in automobile accidents, and suggestions from the automated vehicle developers. In addition, in the defined dilemma situations, the factors affecting movement for establishing driving strategies were explored, and the priorities of factors affecting driving according to the Road Traffic Act and driving strategies were derived accordingly.

• Journal of Korean Society of Transportation
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• v.23 no.5 s.83
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• pp.113-120
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• 2005

Highway geometric design aims to provide drivers with safe and efficient road conditions. Highway design method of Korea doesn't consider demand characteristics of drivers, vehicles etc. Therefore there is a gap between designer's expectation and user's behavior and it hinders to make safer roads. It is required to develop the geometric design criteria and design method based on driving characteristics to provide safe and flexible design. This study suggested a geometric design method of horizontal curves on rural 4-lane highways based on speed distribution.