Institute of Transportation, MOTC

　　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 formulas 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++. Verification and validation proceed step by step to en-sure the simulation model to be almost realistic with statistical proof. The simu-lation scenarios of comparing percentages of total travel time savings with six different train class combinations and four different headways between FAS and MAS are also presented. The results have shown that the percentage of total travel time saving increases gradually depending upon decreasing headway with MAS, no matter how the combination sequences of train classes will be provided.