Author(s)

M. Miyachi & H. Irinatsu

Abstract

In East Japan Railway Company(JR East), the ATP system based on the transponder technology is applied to upgrade the safety on commuter lines in the Tokyo metropolitan area since 1989. This ATP system was named ATS-P(the Automatic Train Stop with on-board Pattern) in Japanese National Railway. This ATS-P performs the wayside-to-train communication by the transponder technology. The coded message transmitted from a ground coil enables the on-board devices to perform a continuous supervision of the train speed. The lines equipped with the ATS-P system accounted for 706 kilometers as of December 31,1995. Applying the ATS-P to moderate traffic lines, it would be necessary to devel

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