• Title/Summary/Keyword: Subway Network

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Bus Stop Network Integrated Spatial Network for Urban Spatial Analysis (도시 공간분석을 위한 버스노선망 통합 공간 네트워크)

  • Piao, Gen-Song
    • Journal of the Architectural Institute of Korea
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    • v.37 no.3
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    • pp.3-10
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    • 2021
  • The purpose of this study is to propose a spatial network reproduction method based on 'integration of bus stop network into existing spatial network' for urban spatial analysis and to verify its effectiveness. To achieve this goal, first, a method of integrating a spatial network based on a 'bus stop network' with an existing 'street network' and a 'integration of subway network into street network' based spatial network was proposed. Next, in order to verify the effectiveness of the spatial networks based on the 'integration of bus stop network into street network' and 'integrated bus stop network, street network and subway network', a correlation analysis between the space syntax analysis result of Seoul and the actual floating population was conducted. As a result of the analysis, the correlation value of 'integration of bus stop network into street network' was slightly higher than that of existing 'street network', and 'integrated bus stop network, street network and subway network' showed a little lower correlation value compared to existing 'integration of street network into subway network'. In conclusion, when the space syntax is applied to urban spatial analysis, the "bus stop network" implies that there is a limit to improving the performance of the spatial analysis model.

Characteristics and Efficiency Analysis of Evolutionary Seoul Metropolitan Subway Network (진화하는 서울 지하철 망의 특성과 효율성 분석)

  • Zzang, See-Young;Lee, Kang-Won
    • Journal of the Korean Society for Railway
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    • v.19 no.3
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    • pp.388-396
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    • 2016
  • The metropolitan subway network of Seoul has gone through many evolutionary processes in past decades to disperse the floating population and improve the traffic flow. In this study, we analyzed how the structural characteristics and the efficiency of the subway network have changed according to the dynamic evolutionary processes of the metropolitan subway network of Seoul. We have also proposed new measures that can be used to characterize the structural properties of the subway network more practically. It is shown that the global efficiency is about 74%, which is higher than those of subway networks of foreign countries. It should also be considered that passenger flow between stations is even higher, at about 85%. Since the private lines, including line 9, the New Bundang line, the Uijeongbu line, and the Ever line do not release their traffic data since September, 2013, only 5 years of data from September, 2008 to September, 2013 is available. So, in this study we limit the analysis period to these 5 years.

Subway Network Expansion and Spatial Restructuring of Accessibility in Seoul

  • Lee, Keum-Sook
    • Journal of the Korean Regional Science Association
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    • v.11 no.2
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    • pp.53-63
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    • 1995
  • Changes in transport are reflected in the accessibility of a place, which is denoted as the inherent advantageous characteristics of a place with respect to overcoming spatial friction, and affect the land use ultimately. A composite accessibility measurement scheme is developed and applied to the subway network in Seoul, which has been constructed in 1972. Changes in the transport network are reflected in the spatial structure of accessibility and affect ultimately the land use pattern. Therefore, it is of relevance to examine the changes in the spatial structure of accessibility, which allows to forecast the direction of changes in the land use pattern.

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Geographical Analysis on Network Reliability of Public Transportation Systems:A Case Study of Subway Network System in Seoul (대중 교통망의 네트워크 신뢰도에 관한 지리학적 분석 -서울시 지하철망을 대상으로-)

  • Kim, Hyun
    • Journal of the Korean Geographical Society
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    • v.44 no.2
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    • pp.187-205
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    • 2009
  • Failures on network components of a public transportation system can give rise to the severe degradation of entire system functionality. This paper aims at exploring how potential failures can affect the system flows and reliability of subway network systems in Metropolitan Seoul. To evaluate the range of impacts of disruptions, this research employs a probabilistic approach, network reliability. Network reliability measures the network resiliency and probability of flow loss under a variety of simulated disruptions of critical network components, transfer stations in subway system. By identifying the best and worst scenarios associated with geographical impact, as well as evaluating the criticality of transfer stations, this research presents some insights for protecting current subways systems.

A Study on the Operation of Express Train on the Seoul Metropolitan Subway Network - Focused on Kyungwon & Jungang Lines - (수도권 광역철도 급행열차 운행방안 연구 - 경원선.중앙선을 중심으로 -)

  • Lee, Weon-Soon;Kook, Kwaung-Ho
    • Proceedings of the KSR Conference
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    • pp.645-656
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    • 2008
  • The operation of express train on the Seoul Metropolitan Subway Network is centered on the Kyungbu and Kyungin lines and the short section between Dongducheon station and Ganyung station which is 20.7km long. It is true that the needs of many customers who want to reduce their commuting hours by express train is not satisfied. This paper proposes that the operation of express trains be enlarged to Sungbuk station on Kyungwon line which comes to 34.9 km long, and to Yangsu station from Youngsan station on Jungang line. The type of operation is mixed one with high and low speed trains, which operates express train by use of existing siding tracks without improving facilities such as extra building of sidings. This pragmatic study is to apply the goal of reducing running time as express train and to suggest the selection of appropriate stops, effectivenes analysis of express train operation and formation of train diagrams to actual operation.

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Model Development for the Spatial Diffusion Effect Estimation of Nodal Accessibility Increment in the Subway Network (지하철 접근성 증가의 공간적 파급효과 산출모형 개발)

  • 이금숙
    • Journal of the Economic Geographical Society of Korea
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    • v.1 no.1
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    • pp.137-149
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    • 1998
  • It is likely that the spatial structure of the intraurban accessibility as well as the accessibility value of each of the nodes in the subway network is affected by the addition of new linkages. The changes in the accessibility at individual nodes also affect the accessibility in the surrounding areas at some distances away from the nodes. Graph-theoretic algorithms have been developed as a proper measurement scheme for the nodal accessibility in tracked transport networks such as subway networks. However, the graph-theoretic measurements have limitations to estimate the spatial diffusion effect on the surrounding areas. This study proposes a new model for the spatial diffusion effect estimation of nodal accessibility increment in the subway network toward the surrounding areas. Since the distance decay trend of subway station use reflect the spatial diffusion effect of the accessibility of subway station toward the surrounding area. The model is deduced from the subway station use density function which is formulated by the questionnaire survey data.

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A Study on Improving Subway Crowding Based on Smart Card Data : a Focus on Early Bird Policy Alternative (교통카드 자료를 활용한 지하철 혼잡도 개선 연구 : Early Bird 정책대안을 중심으로)

  • Lee, Sang Jun;Shin, Sung Il
    • Journal of Information Technology Services
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    • v.19 no.2
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    • pp.125-138
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    • 2020
  • Currently, subway crowding is estimated by observing a specific point at specific hours once or twice every 1 or 2 years. Given the extensive subway network in Seoul Metropolitan Area covering 588 stations, 11 lines and 80 transfer stations as of 2017, implementing crowding mitigation policy may have its limitations due to data uncertainty. A proposal has recently been made to effectively use smart card data, which generates big data on the overall subway traffic related to an estimated 8 million passengers per day. To mitigate subway crowding, this study proposes two viable options based on data related to smart card used in Seoul Metropolitan Area. One is to create a subway passenger pattern model to accurately estimate subway crowding, while the other is to prove effectiveness of early bird policy to distribute subway demand that is concentrated at certain stations and certain time. A subway passenger pattern model was created to estimate the passenger routes based on subway terminal ID at the entrance and exit and data by hours. To that end, we propose assigning passengers at the routes similar to the shortest routes based on an assumption that passengers choose the fastest routes. In the model, passenger flow is simulated every minute, and subway crowding level by station and line at every hour is analyzed while station usage pattern is identified by depending on passenger paths. For early bird policy, highly crowded stations will be categorized based on congestion level extracted from subway passenger pattern model and viability of a policy which transfers certain traveling demands to early commuting hours in those stations will be reviewed. In particular, review will be conducted on the impact of policy implemented at certain stations on other stations and lines from subway network as a whole. Lastly, we proposed that smart card based subway passenger pattern model established through this study used in decision making process to ensure effective implementation of public transport policy.

Analysis of Seoul Metropolitan Subway Network Characteristics Using Network Centrality Measures (네트워크 중심성 지표를 이용한 서울 수도권 지하철망 특성 분석)

  • Lee, Jeong Won;Lee, Kang Won
    • Journal of the Korean Society for Railway
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    • v.20 no.3
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    • pp.413-422
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    • 2017
  • In this study we investigate the importance of the subway station using network centrality measures. For centrality measures, we have used betweenness centrality, closeness centrality, and degree centrality. A new measure called weighted betweenness centrality is proposed, that combines both traditional betweenness centrality and passenger flow between stations. Through correlation analysis and power-law analysis of passenger flow on the Seoul metropolitan subway network, we have shown that weighted betweenness centrality is a meaningful and practical measure. We have also shown that passenger flow between any two stations follows a highly skewed power-law distribution.

Relationships between Topological Structures of Traffic Flows on the Subway Networks and Land Use Patterns in the Metropolitan Seoul (수도권 지하철망 상 통행흐름의 위상학적 구조와 토지이용의 관계)

  • Lee, Keum-Sook;Hong, Ji-Yeon;Min, Hee-Hwa;Park, Jong-Soo
    • Journal of the Economic Geographical Society of Korea
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    • v.10 no.4
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    • pp.427-443
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    • 2007
  • The purpose of this study is to investigate spacio-temporal structures of traffic flows on the subway network in the Metropolitan Seoul, and the relationships between topological structures of traffic flows and land use patterns. In particular we analyze in the topological structures of traffic flows on the subway network in time dimension as well as in spatial dimension. For the purpose, this study utilizes data mining techniques to the one day T-card transaction data of the last four years, which has developed for exploring the characteristics of traffic flows from large scale trip-transaction databases. The topological structures of traffic flows on the subway network has changed considerably during the last four years. The volumes of traffic flows, the travel time and stops per trip have increased until 2006 and decreased again in 2007. The results are visualized by utilizing GIS and analyzed, and thus the spatial patterns of traffic flows are analyzed. The spatial distribution patterns of trip origins and destinations show substantial differences among time zones during a day. We analyze the relationships between traffic flows at subway stops and the geographical variables reflecting land use around them. We obtain 6 log-linear functions from stepwise multiple regression analysis. We test multicollinearity among the variables and autocollelation for the residuals.

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