ATOS (autonomous decentralized transport operation control system)

In traffic-management system (TMS) for existing lines of a metropolitan area, there was a limit in the control of a large station in the centralized TMS based on the conventional CTC (centralized traffic control). In the case of TMS, all information is gathered and judged based on train schedule, namely train diagram and traintracking data, in the center, and is controlled via CTC. For this reason, it is difficult to control all stations in a metropolitan area, which have many large stations, making introduction of the system difficult. Development to resolve this big issue was done in the Tokyo autonomous decentralized transport operation control system (ATOS). It is a total system that carries out transport operation control and signal control of the existing 24 lines in the Tokyo metropolitan area. It is the largest system in the world, covering complex and high-density operations of existing lines (minimum headway of about 2 min). Its features are as follows: (1) Including the electronic interlocking system into the transport operation control system, constituting an ATOS that arranges the diagram and route-control function at the station. This makes automatic control of line with complex large stations possible. (2) Even when the diagram is disturbed by any accident, it is a system that can quickly recover the diagram by the operation adjustment function that the operator can operate with the diagram-based operation*. (3) When the concept of new interlocking logic which integrates maintenance work management function was considered, the management of occupancy information of track was adopted to interlocking logic by the method of exclusively controlling this track occupancy information. (4) By adopting autonomous decentralized system (ADS), online testing of the system and step by step system construction of the system became possible, it became easier to construct a large scale system step by step and to partially replace. In this way, ATOS contributes greatly to the system construction of large-scale and complicated line sections.