To surely perform the high density operation in safety.

A high density operation system for controlling the operation of a plurality of vehicles 3 traveling on a track with high density, comprises the radio markers 21 which are fixed on a track at specific intervals, hold the mounted absolute positions and the limited speed as the data, and wirelessly transmits the data to the vehicles 3, and an operation command computer 35 which monitors whether a distance between the vehicles 3 is more than the shortest safety distance on the basis of the absolute positions received from the vehicles 3 and the real speed, and transmits the travel control command of the vehicles 3 to the vehicles 3 through a data transmitting device 34. The traveling of the vehicles 3 is controlled by checking the travel control command received from the operation command computer 35 and the data received from the radio markers 21, and the data received from the radio markers 21 is transmitted to the operation command computer 35 through the data transmitting device 34.