A feasible partial train traffic simulation using diagram expressed in network

Simulating large-scale and complex systems is commonly considered a difficult and time-consuming task. In this paper, we propose a partial simulation way to speed up the simulation with real time demands. It is based on the idea that a train traffic diagram is expressed in a network, and through calculating the maximal long path in the network the simulation is done, but only within a particular partial area. Upon this, we let it become a problem oriented simulation. The simulation could be started at any time, from any trains or at any stations and stopped as the same way according to the problem to be concerned. We can use this kind of simulation to analyse or confirm the correctness of traffic schedule at a high speed to meet the real time demands.