In high-rize builiding or large-scale commercial buliding, waiting time of elevator-arrival tend to be long cause of large number of floors and passengers. As the solution, increasing number of shafts is effective, though it results in reduction of space of the buliding, there is a limit to increasing number of shaft. For the reason, some systems which have somne independent elevators within one shaft are presented. One of the latest system is one-shaft-twin-car-elevator developped in Germany. This systems is actually running in some buildings. Tough this system has the disadvatage that each car can't overtake each other. For soloving this problems, we proposed one-shaft-multi-car-elevator including one special car movable between two shafts, which are driven by common ropes and each car can overtake each other. In this paper, we evaluate the passenger transportation capacity of this system using numerical simulation.
