Katsuji Akita

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A computerized interlocking system for railway signaling control is proposed. The overall architecture of this system, aiming at a high degree of safety, reliability, and flexibility, is shown. The basic architecture of both a fail-safe microcomputer subsystem which is the kernel of this system and system-bus structured multimicrocomputer subsystem is(More)
The Shinkansen is a safe, reliable, mass, and rapid public transportation system in Japan. The authors discuss COMTRAC in the Shinkansen. First, they look into the concept and technology of fail-safe in railways. Second, they explain COMTRAC and its fault-tolerant computer systems. Finally, they give several kinds of field data accumulated during the past(More)
First introduced together with the extension of Tokaido-Shinkansen railway in 1972, the COMTRAC large-scale command-and-control system efficiently controls the train's high-speed, high-frequency, high-diversity operations. This article introduces COMTRAC's technological features and gives an overview of its 50-year history, including the early days of(More)
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