Author(s)

Y. Sato, T. Takashige & I. Watanabe

Abstract

We are developing Advanced Automatic Train Protection system to resolve some problems in the existing ATP. In the existing ATP, only a speed signal which specifies the maximum speed on each block section is transmitted to an on-board processor through the track circuits by using combination of two signal frequencies. On the other hand, in the advanced ATP, complicated message such as the distance to the preceding train and position of the actual train are transmitted through the rails by using digital codes. An on-board processor generates a braking pattern corresponding to its own braking performance and the speed restriction on switches and applies the brake automatically if the actual train speed exceeds the calculated value. Using track circuits for transmitting is reliable theoretically, but the traction c

Keywords