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Trans. Planning Journal
| Title | Simulation Modelling and Analysis of Taiwan Railway Administration’s MRT-Type Operations by Using Stochastic Petri Nets |
|---|---|
| Author | Chi-Chung Tao and Min-Ching Hung |
| Summary | To transform the railway transportation system into the system with MRT’s characteristics, Taiwan Railways Administration(TRA) has promoted a policy called “Transformation of the Taiwan Railway into a MRT-type railroad” for the past few years. This study presents the SISDM based on Stochastic Petri Nets (SPN) describing visualized functions and system dynamic activity functions which can be regarded as a toolkit of railway operations simulation modeling and analysis. First, related data provided by TRA and results of own surveys are collected and summarized. Then, a simulation model based on the SPN is developed to analyze TRA’s train operations and dispatching strategies similar to MRT-type operations. By taking Keelung-Chungli southbound line as the empirical study, numerous simulations are performed with various scenarios including different headways, train types, timetable delays. Having implemented transformation of the Taiwan Railway into a MRT-type railroad policy, the simulation results indicate the total system efficiency will be optimal with the average headway 240 s if train cars are assumed to be available. Longer headway operations are suitable when the proportional combination between slow and express train types is 1 to 1. No matter how long or short the headway is, the total system efficiency will be optimal when the proportional combination is 2 to 1. Nevertheless, shorter headway operations are preferred when the proportional combination is 3 to 1. Although the strategy of increasing special frequency to reduce timetable delay is not significant to eliminate propagation impacts of timetable, it is still very effective to maintain regular headways. |
| Vol. | 44 |
| No. | 4 |
| Page | 333 |
| Year | 2015 |
| Month | 12 |
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