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Endüstri Mühendisliği Bölümü Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/226

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Browsing Endüstri Mühendisliği Bölümü Tezleri by Author "Keskin, Merve"

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    Master Thesis
    Freight transportation in Turkish state railways (tcdd) high-speed train system
    (2013) Keskin, Merve
    The aim of this thesis is to improve the freight transportation system of Turkish State Railways (TCDD) by using high speed trains (HSTs) on high speed lines as a new concept. The development of railway and HST systems in the world and in Turkey is discussed and comparison of these systems with other transportation modes is investigated. Since HST is faster than trucks and cheaper than airlines for freight transportation and increases the utilization of railway system substantially, it is very advantageous. While HSTs are used for freight transportation in some countries such as France, Germany etc., they are not used currently for freight transportation in Turkey. Therefore, in this thesis, freight is added to the existing high speed rail system which is currently used for only passengers. A HST scheduling model is constructed to observe the effects of freight when it is included in the system. The aim of the model is to complete daily travel as early as possible within a day to increase utilization of the system. Daily travel of each train consists of sequence of cities and links between these cities. In experimental study, two types of sequence of cities are used: trips using one sequence of cities and trips using two sequences of cities. In the first type, all available trains are used to perform daily travels in one sequence of cities. Then for the second type, the linkage is divided into two and available trains are allocated to these separate two linkages. Freight transportation is also analyzed in two cases which are adding separate freight trains to the system and using the same trains with passengers for freight transportation. It can be concluded that dividing the sequence of cities into two provides the completion of the train services earlier in a day and using the same trains with passengers for freight transportation provides more time savings for the system. Freight transportation in HSTs is a complex task to achieve and requires many factors to be taken into account. This thesis is a first attempt to address this complex task.