We have evaluated Train Interval Adjustment Algorithms and implemented on a train traffic control simulator from passenger's viewpoint. Train interval adjustment is quite an important task on urban dense traffic railway lines. Train interval adjustment is to adjust train intervals regardless of the original schedule so that passengers' concentration on trains does not disrupt train operation. Delay of a train's arrival at a station would increase the number of people who wait at upcoming stations, and the train has to stop longer than usual. If train intervals are not adjusted, the situation will get worst and fall into a vicious circle.