• Title, Summary, Keyword: Modal Split Model

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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.

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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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.

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.

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.

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.

A Multi-modal Continuous Network Design Model by Using Cooperative Game Approach (협력적 게임을 이용한 다수단 연속형 교통망 설계 모형)

  • Kim, Byeong-Gwan;Lee, Yeong-In;Im, Yong-Taek;Im, Gang-Won
    • Journal of Korean Society of Transportation
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    • v.29 no.1
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    • pp.81-93
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    • 2011
  • This research deals with the multi-modal continuous network design problem to resolve the transportation policy problems for constructing and operating transportation facilities with considering the mutual decision-making process between transportation operator and user in the multi-modal network. Particularly, in the consideration of changes in travel pattern between transport modes due to the changes in transportation policy, road network for passenger car and transit network for public transportation are considered together. In the development of network design model, more rational Stackelberg equilibrium(cooperative game) rather than more general Nash equilibrium(non-cooperative game) approach is used and sensitivity analysis considering transport mode is used. A multi-modal continuous network design model in this study is developed for the arbitrary continuous network design parameters(${\epsilon},\hat{\epsilon},p$) of transportation policy decisions. As examples of application and evaluation for these design parameters, the developed model is applied to calculate 1)the optimal capacity of road link in the road transport policy, 2)the optimal frequency of transit line in public transport policy and 3)the optimal modal split in transport modal share policy.

A Study on Fare Management For Taxicab as a Means of Paratransit in Urban Areas (준대중교통수단으로서 택시교통요율 관리에 관한 연구)

  • 임강원
    • Journal of Korean Society of Transportation
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    • v.2 no.1
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    • pp.3-16
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    • 1984
  • Development of para-transit is imminent in modern metropolis which are galloping toward motorization. Compared with other already industrialize countries, our metropolis can take a vantage of late starter in coping with urban transportation problem. Our metropolis are still heavily relying on public and/or pare-transit in modal split. Current government policy toward taxi-cab, however, seems to contradict with the objective of developing para-transit. If it is not adequately developed, the middle-class people of higher income would have no other option than having their own auto as already been observed. It will centainly accelerate our motorization process so that we follow the model of industrialized countries, and their problems too. Insisting that our transport policy should be drastically reformulated in favor of paratransit in addition to public transit, this study reappraise current policy on taxi-cab with respect to fare, prohibition of shared-ride, and other regulatory measures and propose and management model for taxi fare and operating policy in metropolis.

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Air Pollution Forecasting Using Urban Transportation Planning Models and Air Pollution Dispersion Models (都市交通計劃 모델과 大氣汚染 擴散모델을 이용한 都市地域 大氣汚染 豫測)

  • 董宗仁;趙康來;金良均;兪 浣
    • Journal of Korean Society for Atmospheric Environment
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    • v.2 no.2
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    • pp.31-40
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    • 1986
  • Motor vehicle related air pollution has become more serious because of rapid increase of number of cars, specially in the urban area. The increase trend seems to be accelerated, however, the fact is that road conditions, parking facilities and traffic control systems are far behind coping with this situation. In spite of the lack of related basic data, urban transportation planning (UPT) and air pollution dispersion models were applied to predict air pollution level. In standard UPT model, trip generation, distribution, modal split and network assignment were estimated by experimental equations and appropriate models. The air pollution level in the central business area was believed to be higher and it will increase continuously due to the increase of traffic demand. To meet this situation, air pollution problem should be considered as a part of integrated plannings of urban plans or transportation plans as well as more stringent motor vehicle emission standards, have to be enforced.

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