• Title, Summary, Keyword: Modal Split

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A Behavioral Analysis of automobil users apply consection toll theory (교통혼잡비용 적용에 따른 승용차 형태분석에 관한 연구)

  • 박창호;진삼현
    • Journal of Korean Society of Transportation
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    • v.12 no.4
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    • pp.131-151
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    • 1994
  • An investigation is given to a behavioral analysis of automobile users applying congestion toll theory for the purpose of maintaining the efficiency of transportation system. A case study is performed for the city of Seoul, where modal split behavior of automobile user groups is analysed in various level of congestion toll. Automobile users are grouped with respect to their income levels and work shift times. Automobile user behavior is then explained against the field data. A Logit-type model is applied for modal split changes through the application of congestion toll. It is found in the case study that the users in the monthly income bracket of 1.0~1.5 million won is the most predictable group whose work travel time begins 7:00~9:00 a.m. It is also found in the study that 1,000~1,500 won of congestion toll whould reduce the auto use as much as 5%.

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Free vibration analysis of double split beams (이중 층상균열보의 자유진동해석)

  • Han, B.K;Lee, S.H
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.21 no.12
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    • pp.2008-2018
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    • 1997
  • In this study, free vibration analysis of double through-the-width split beam is studied based on the author's earlier work. Each segment which constructs double through-the-width split beam is considered as Timoshenko beam. The effect of coupling between longitudinal and transverse vibration on the natural frequencies of split beams is considered. Data acquisition and modal test of double split beam for clamped-free boundary condition are carried out. Experimental and numerical results obtained by ANSYS were compared with the calculated data by present theory and their comparisons give good agreement with one another. The influences of the size and location of double split, shear deformation, and boundary conditions on the natural frequencies are demonstrated for illustrative purpose. Effects of double split on the dynamic characteristics of beams can be used to detect the size and the location of damages in structures.

A Study on the Modal Split Model Using Zonal Data (존 데이터 기반 수단분담모형에 관한 연구)

  • Ryu, Si-Kyun;Rho, Jeong-Hyun;Kim, Ji-Eun
    • Journal of Korean Society of Transportation
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    • v.30 no.1
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    • pp.113-123
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    • 2012
  • This study introduces a new type of a modal split model that use zonal data instead of cost data as independent variables. It has been indicated that the ones using cost data have deficiencies in the multicollinearity of travel time and cost variables and unpredictability of independent variables. The zonal data employed in this study include (1) socioeconomic data, (2) land use data and (3) transportation system data. The test results showed that the proposed modal split model using zonal data performs better than the other does.

Connectivity Analysis of KTX Stations according to KTX Connection Characteristic Variable and KTX Modal Split (고속철도 연계특성변수와 수단분담률에 따른 고속철도역 연계성 분석에 관한 연구)

  • Shin, Hyun-Ju;Kim, Byung-Kwan
    • Journal of the Korean Society for Railway
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    • v.16 no.6
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    • pp.503-509
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    • 2013
  • Since the opening of KTX, the number of people coming to KTX stations to use KTX has steadily increased. Passengers have a variety of access modes between a KTX station and their origin/destination. But there is no way to confirm the level of connection strength. So this study examines various connection characteristic variables that can show the connectivity, and examines influencing relationships, and chooses variables that affect connectivity by using a KTX modal split. We will suggest connectivity estimation models between a KTX station and origin/destination based on the selected connected variables.

A Study on the Classification of Transportation Connections in Seoul Subway Adjacent Area Using Portfolio Analysis (Portfolio분석을 이용한 서울시 역세권 지하철 연계수단간 유형분류 연구 - 서울시 25개 행정구역을 중심으로 -)

  • Kim, Tae-Ho;Park, Jun-Tae;Son, Sang-Ho;Park, Je-Jin
    • Journal of The Korean Society of Civil Engineers
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    • v.35 no.6
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    • pp.1329-1338
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    • 2015
  • This article aims to develop model for the right policy Tools available from the cause analysis regarding the regional differences of subway modal split in Seoul metropolitan area. This allows two major factors of the most influential subway modal split to be proved and Portfolio Analysis is conducted. The results are as follows. Firstly, the two primary factors affecting subway modal split were shown as subway adjacent area and local line bus. It signifies that expansion of subway adjacent area, establishing the number of the subway stations and increase of local line bus are required in order to improve a diminishing subway modal split. Following that, pattern of the improvement to strengthen better subway connections are classified according to the two areas which are Concentration Area of Improvement in Subway Station Area (CAISSA) and Concentration Area of Improvement in Local Bus (CAILB). Our study revealed that Ganbukgu, Seodaemungu, Geumcheongu, and Gwanakgu were selected as the area of CAILB and Songpagu, and Junggu were selected as the area of CAISSA. As all things are considered, transportation policy makers should be taken into account in the two main factors driven by our study according to types in order to enhance the future subway share proportion.

Estimation of Optimal Modal Split Considering the Subsidy Policy - In the Case of Dual Mode Trailer (보조금 정책을 고려한 적정 수송 분담률 추정 모형 - Dual Mode Trailer(DMT) 사례를 중심으로)

  • Park, Bum-Hwan;Kim, Chung-Soo;Lee, Kang-Won
    • Journal of the Korean Society for Railway
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    • v.12 no.2
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    • pp.205-211
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    • 2009
  • There is need to reform the road-based logistic transportation system into the railway-based logistics transportation system in order to decrease the total social cost related with logistics transportation. And new transportation modes such as dual mode trailer (DMT) are under consideration, which are expected to decrease current market share of road. But, most of current studies about estimating economical efficiency are focused on developing the probabilistic choice model and then estimating the market share of each mode. We present an approach to compute the optimal market share of each mode in terms of total social cost. To do so, we suggest an optimization model capturing both user choice to maximize his utility and subsidy policy intended to minimize total social cost, simultaneously. Using this model, we present the optimal modal split of container freight.

Relationships between Urban Transportation System and Energy Efficiency (도시교통체계와 에너지효율성의 관계분석)

  • Sin, Yong-Eun;Gang, Min-U;Im, Mi
    • Journal of Korean Society of Transportation
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    • v.28 no.2
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    • pp.161-169
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    • 2010
  • The amount of energy consumed by a transportation system in a city is influenced not just by a transportation system itself but also by city's spatial character. Yet there have been very limited studies on this subject. This study investigates the factors that influence the energy consumption by a transportation system and city's spatial character. The model of an urban area confined within a definite boundary is assumed in order to develop the relationships between the energy consumption and the transportation system. Various assumptions on the character of a city and activities are made. An equation for computation of the energy consumption is derived with such factors as modal split, densities of residents and workers, as well as technological development. Using the equation, sensitivity analyses are performed in order to identify the relationships between energy consumption and influencing factors. It is found that the modal split is the most powerful factor that determines the energy consumption by the transportation system. Yet it is also found that the densities of residents and workers and the technological factors are very important in determining the amount of energy consumption as well.

Sensitivity Analysis of Stochastic User Equilibrium in a Multi-Modal Network (다수단 확률적 사용자 균형의 민감도 분석)

  • Kim, Byeong-Gwan;Im, Yong-Taek
    • Journal of Korean Society of Transportation
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    • v.28 no.5
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    • pp.117-129
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    • 2010
  • This study presents a sensitivity analysis method for stochastic user equilibrium of multi-modal network flows. We consider a multi-modal network consisting of a road network for passenger cars physically separated from a transit network for public transport. We first establish a sensitivity analysis method with respect to arbitrary link parameters and perform a sensitivity analysis with respect to link capacity and transit line frequency as practical link parameters. Next, We establish a sensitivity analysis method and perform the sensitivity analysis with respect to modal split by passenger car and public transit. As with the elasticity of economics, these results can be important information for analyzing changes in travel behavior due to the changes in operation and policy of transportation facilities, as well as for analyzing the effects of these operational changes and policies. These results also can be utilized as a tool to constitute a multi-modal network design problem by using cooperative game theory.

A BI-Level Programming Model for Transportation Network Design (BI-Level Programming 기법을 이용한 교통 네트워크 평가방법 연구)

  • Kim, Byung-Jong;Kim, Won-Kyu
    • Journal of Korean Society of Transportation
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    • v.23 no.7
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    • pp.111-123
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    • 2005
  • A network design model has been proposed. which represents a transportation facility investment decision problem. The model takes the discrete hi-level programming form in which two types of decision makers, government and travelers, are involved. The model is characterized by its ability to address the total social costs occurring in transportation networks and to estimate the equilibrium link volumes in multi-modal networks. Travel time and volume for each link in the multi-modal network are predicted by a joint modal split/traffic assignment model. An efficient solution algorithm has been developed and an illustrative example has been presented.

Modal Split Forecasting of Tour-Bus Based on Changing Demand Between Tour-Bus and Cars (관광객의 수요변화에 따른 관광버스 분담율 추정에 관한 연구)

  • 장명순;강창욱
    • Journal of Korean Society of Transportation
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    • v.11 no.3
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    • pp.21-30
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    • 1993
  • When the cars were not popular, the majority of travellers used the tour-bus. As the total number of cars increases every year, the pattern of travelling means is changing. This paper develops statistical models to predict the number of cars, to estimate the macket share of road transportation between tour-bus and cars.

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