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Transportation Dissertation
| Title | A Simulation model for line section capacity analysis of Taiwan Railway |
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| Year | 2006 |
| Summary | Song-Han Liu, 2006.07 Graduate Institute of Transportation Science, Tamkang University The Applications of high technologies in the field of railways to improve safety and efficiency have become a global trend recently, such as Moving Auto-blocked System (MAS) has been promoted in USA, Europe and Japan. Taiwan Railway Administration (TRA) is often not able to cope with changeable travel demands to increase capacity because of using Fixed Auto-blocked System (FAS). It is, therefore, the main purpose of this study to quantify the possible capacity by comparing MAS and FAS.The “Song Sang-Hsinchu” line section of TRA is chosen as the empirical case study to verify and validate the proposed simulation model considering the characteristics of running and overtaking behaviors with multiple train classes. First, speed-distance diagrams for each train class are identified by using mathematical formals derived from analytical models. Then the logical flows of train movements from starting station to end station for time-space diagrams with two different train operation systems are transformed into a simulation program by using C++. Verifications and validations are proceeded stepwise to ensure the simulation model to be almost realistic with statistical proofs. It is concluded that a solid capacity analysis is feasible only when observed points without train tasks disturbances on a bottleneck line section are fixed. The weight averages method is also recommended to calculate train operation headways considering various train classes. In the case of existing train tasks and train classes, it is shown significantly that the capacity with FAS is 122 (TU/day), while the capacity with MAS is 273(TU/day). The existing capacity almost increases 124%. |
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