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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
대한교통학회 대한교통학회 학술대회지 대한교통학회 제59회 학술발표회
발행연도
2008.10
수록면
875 - 884 (10page)

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Recently, intermodalism has become important in carrying freight across the transportation network. As a result, freight transport multimodal modeling has received attention in research development area. The most important part of freight modeling is estimating freight demand flows. Most existing models derive freight demand from the zonal economic activities and represent the interaction between zone pairs by a series of origin and destination demand matrices. Through review of the existing studies on the freight related demand modeling, it was found that two types of demand matrix data represention should be clearly distinguished. The first type is the origin and destination demand data termed production/consumption (P/C) matrix describing trade interactions from the initial producer to a final consumer. The second type is termed O/D matrix describing transport interactions. Note that a set of O/D matrices is a subset of the P/C matrix in that the actual set of physical transport movements generated by the logistics structure. Travel movements used to distribute and transport the P/C trades in practice is represented by the O/D matrices. For instance, carrying a given P-C trade is accomplished by a set of successive shipment legs in which each separated shipment leg is represented by the mode specific O-D. Most transport models ignore freight warehousing. In this sense, the succesive shipment legs of a P-C trade can be released in the form of multimodal O/D rather than sets of mode specific O/D.

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