• Title/Summary/Keyword: LOS분석

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Improvement of Analysis Method for Pedestrian LOS on Sidewalk in Seoul (서울시 보도의 보행 LOS 진단 및 분석방법 개선에 관한 연구)

  • Lee, Shin-Hae
    • Journal of Korean Society of Transportation
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    • v.30 no.3
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    • pp.7-15
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    • 2012
  • Korean Highway Capacity Manual (KHCM) has been used when we analyze the pedestrian Level of Service (LOS) of a pedestrian facility. However, the pedestrian LOS by KHCM is largely insensitive to pedestrian congestion levels. The objective of this study is to identify the source of this problem within the KHCM calculation method, and to propose an improved method using the case study from Seoul. Based on KHCM results, the pedestrian LOS is A for more than 90% of the Seoul region, which seems to be unrealistic. On the other hand, this study includes an effective adjustment parameter using the absolute value of effective sidewalk width. Using this method, results shows some changes including newly identified areas of LOS C and LOS D. The analysis of pedestrian LOS is carried out for the entire metropolitan region of Seoul in order to evaluate area wide pedestrian level of service in Seoul.

A Study on Enhancement Methods of Level of Service Analysis for Pedestrian Sidewalks (보행자도로 서비스 수준 분석방법 개선 연구)

  • Kim, Eungcheol;Choi, Eun Jin;Yang, Joo Young
    • Journal of Korean Society of Transportation
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    • v.33 no.1
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    • pp.29-39
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    • 2015
  • Currently, level of service(LOS) analysis methods for pedestrian sidewalks are provided in Korean Highway Capacity Manual(KHCM, 2013). However, conventional methods provided in the KHCM produce most of pedestrian sidewalks' LOS as level A, indicating that existing analysis methods are unable to reflect realistic pedestrian sidewalks' LOS. The objectives of this research are to identify the suitability of current LOS criteria and to propose improved LOS evaluation criteria and methods with pedestrian volume data carried out for 10,000 sites in 2009. This research proposes new criteria by using the qualitative definition of LOS proposed by Fruin and Hall, new standard Korean human scale and new criteria of pedestrian occupancy space. Application results of new criteria show that more realistic results can be achieved than the existing methods. It is expected that applying the newly developed criteria and methods can make planning, design and construction of pedestrian sidewalks more realistic and various.

The Effect of Digital Elevation Resolution on LOS Analysis (지형고도자료 해상도가 가시선분석에 미치는 영향)

  • Eo, Yang-Dam;Park, Wan-Yong;Lee, Yong-Woong;Lee, Byoung-Kil;Pyeon, Mu-Wook
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.3
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    • pp.99-105
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    • 2008
  • The analysis of LOS(Line-Of-Sight) is defined as an "unobstructed view between two points". The LOS results may be influenced by terrain source, algorithm/interpolation method, etc. In the area denies any access and flight over, LOS results would be doubtful because of low precision of terrain data therefore have limitations of referring to many military applications. Using LIDAR data, LOS Analysis was performed by changing DTED resolution(1$\sim$30m) and LOS distance(50$\sim$2000m). The results of experiment shows that LOS analysis for small area, such as DMZ surveillance, were heavily influenced by DTED resolution.

A Study on the Support Groups for Public Libraries: With a Special Regard to the Cases of the Los Angeles City Areas (공공도서관의 외부인적자원 활용에 관한 연구 - 특히 미국 LA 및 인근지역 공공도서관의 사례를 중심으로 -)

  • Oh, Dong-Geun
    • Journal of Korean Library and Information Science Society
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    • v.39 no.1
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    • pp.73-97
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    • 2008
  • This study analyzes the general status and major activities of the Friends of the Libraries, volunteers, and Library Foundations in the areas of the County of Los Angeles areas, including Los Angeles City areas, with a special regard to the participation of human resources outside from the public libraries themselves. It based on the researcher's visits to the public libraries and their branches and their friend groups in the areas including those of Los Angeles Public Library, La Crescenta Public Library, Glendale Public Library, and Library Foundation of Los Angeles; related materials given from those libraries and groups upon his visits; and other additional information from their homepages. It finalizes with some suggestions for the Korean library community related to the areas.

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Enfrentamiento con el trauma a través de análisis de personajes femeninos en (영화, <루시아>의 여성 인물 분석을 통한 트라우마 직면의 문제)

  • Park, Chong-Wook
    • Iberoamérica
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    • v.12 no.1
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    • pp.187-212
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    • 2010
  • El cine como medio de narrar el trauma histórico de los cubanos se formó especialmente en los años sesenta gracias al Instituto Cubano del Arte e Industria Cinematográficos y se sitúa en la cumbre. En el cine hecho por el director cubano Humberto Solás el discurso de historia, trauma y su memoria tiende a relatar básicamente sobre el mensaje de no olvidar el trauma histórico a través de buscar la manera eficaz e intrínseca de narrarlo. El hecho de no olvidar el trauma histórico y de poder enfrentarse con los elementos causantes del trauma significa el poder de tener la posibilidad probable de adquirir la mirada objetiva para observar la experiencia 'histórica' y la memoria 'cotidiana', y sus relaciones. Si consideramos el hecho de que la tendencia de la víctima suele querer olvidar la memoria del trauma por el miedo y dolor de enfrentarse con la representación del trauma, el enfrentarse con el trauma representado ya puede significar que la víctima esté en un trámite de conseguir la penetración con la cual supera lo negativo que le ofrece el trauma a la víctima. Este artículo se dedica especialmente para averiguar la estrategia del director cubano para realizar este fin de encontrar la manera adecuada en narrar el trauma cubano para que los cubanos puedan adquirir la penetración a través de la identificación y la simpatía entre los personajes del cine y los espectadores, enfocando con detalle en los carácteres de los protagonistas femeninas que son tres diferentes individuos en el mismo número de episodios. Cada protagonista, Lucía en cada episodio experimenta el trauma personal con diversos motivos, pero a pesar del dolor y del miedo del trauma histórico se despiertan los espectadores, quienes se identifican con la protagonista a través de la simpatía y la identificación, llegándose al momento de conseguir la penetración con la cual mira el futuro de la sociedad cubana con el objetivismo libre de los traumas históricos.

LOS Analysis Frame for COSMOS at Isolated Intersections (실시간신호제어 독립교차로 서비스수준 분석 방법론)

  • Kim, Jin-Tae;Kim, Kang-Huy;Lee, Don-Ju
    • Journal of Korean Society of Transportation
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    • v.26 no.4
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    • pp.161-172
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    • 2008
  • The level of service (LOS) evaluation method of the Highway Capacity Manual (HCM) is limited to intersections with pre-timed signal operation, while advanced real-time traffic control systems have been expending in the field. This paper proposes a preliminary framework for LOS analysis at isolated intersections controlled by COSMOS, the real-time traffic control systems robustly utilizing the degree of saturation as basic inputs. The proposed LOS evaluation framework was devised with a pilot model developed to estimate the average cycle length and green times of COSMOS. The validation test showed that the proposed framework was able to accurately project the LOS, which was separately evaluated based upon field data.

LOS Analysis Algorithm for Mid-range Guided Weapon System (중거리지대공 유도무기체계 적용을 위한 가시선 분석 알고리듬 연구)

  • Lee, Han-Min
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.4
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    • pp.642-649
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    • 2010
  • LOS analysis is used for optimal deployment of mid-range guided weapon system or system engagement effectiveness simulation. Comparing to real-world, LOS analysis includes error sources such as coarse terrain data resolution, refraction of radio waves, and several ideal assumptions. In this research, exact LOS algorithm under assumption of constant earth curvature and error analysis of that is investigated. It proved that LOS algorithm under assumption of constant earth curvature has negligible error in mid-range guidance weapon system's scope.

A Study of Level of Service Criteria for Roundabouts (회전교차로의 서비스수준 기준 정립 연구)

  • Kim, Eung-Cheol;Ji, Min-Gyeong
    • Journal of Korean Society of Transportation
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    • v.27 no.1
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    • pp.7-16
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    • 2009
  • Korea Highway Capacity Manual (2001) proposes only LOS(Level of Service) analysis method on non-control and two-way-stop intersections, not dealing with the analysis method on LOS for roundabouts, nor even including the term 'roundabout'. This study selects proper MOEs for roundabouts and criteria the LOS through simulation analysis. To attain this goal, the authors reviewed the methods to select proper MOEs in the first step, criteria the Los. For this study, the MOEs were chosen from existing literature, and used for the criteria. The MOEs to be applied to roundabouts in this research were entry traffic volume, v/c (volume/capacity) ratio, and average vehicle delays. The results showed that the maximum entry traffic volume(LOS F) at local one-lane roundabout was analyzed to be 1,700pcph and average vehicle delay 18 seconds LOS A was analyzed as 700pcph and average vehicle delay 3 seconds and v/c 0.41 in this case Maximum entry traffic volume(LOS F) at local area 2 lane roundabouts was analyzed as 2,900pcph and their average vehicle delay as 31 seconds LOS A was analyzed to be 1.500pcph and average vehicle delay 8 seconds, v/c 0.52.

Experiment LOS Analysis of 3D Point Spatial Data (3차원 포인트 공간자료 가시선 분석 실험)

  • Park, Jae-Sun;Eo, Yang-Dam;Yeon, Sang-Ho;Moon, Jae-Heum;Kim, Hyung-Tae
    • Journal of Korean Society for Geospatial Information Science
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    • v.18 no.2
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    • pp.55-61
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    • 2010
  • Using 3D point data implemented from terrestrial LiDAR, this research has modelled geospatial data in 2 categories(gridded & un-gridded) and conducted LOS analysis experiment using outcome from the modeling exercise. To compare LOS analysis results from each of the 2 models in the above, maximum LOS (line of sight) range in the experimental area was specified as 30m in Area A, 40m in Area B and 50m in Area C and the time taken by LOS analysis and the number of visible points were measured. As for the LOS analysis experiment results, in comparison with the gridded model, the un-gridded model took about 3.9 times more time in Area A, 5.4 times in Area B and 6.5 times in Area C. In addition, about 0.97 times fewer points were measured in Area A, 0.93 times in Area B and 0.94 times in Area C. The difference between gridded model and un-gridded model in terms of the time taken by LOS analysis increased, as the maximum LOS range extended. On the other hand, the number visible points did not vary significantly in reference to the size of visible range.

Effects of Smartphone Usage on Walking Speed using Machine Learning Method (기계학습을 이용한 스마트폰 이용이 보행속도에 미치는 영향 분석)

  • Jin, Hye ryun;Do, Myung sik
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.18 no.2
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    • pp.93-103
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    • 2019
  • This study analyzed the impact of smartphone usage on walking speed during walking on two pedestrian walkways in Daejeon Metropolitan City. For the analysis, the video data about the actual use of smartphone was acquired and the walking speed was calculated based on the walking density of the pedestrian Level Of Service(LOS) presented in the Road Capacity Manual. Multiple regression analysis and decision tree using machine learning were used to analyze the impact of smartphone usage on walking speed, and as the explanatory variables, gender, disable smartphone, use of smartphone using auditory function, use of smartphone using visual function, LOS A, LOS B, LOS C were adopted. The result showed that LOS C had the highest impact on walking speed change and the women's group using their visual function was founded to have the slowest walking speed in LOS C. In particular, the author found that walking speed significantly decreased in the case of use of visual function rather than listening to music or the hearing on the phone.