| Masayuki Matsumoto | Transport & Rolling Stock Dept., |
| Yoshinori Kon | Advanced Railway System Development Center, Research and Development Center of JR East Gr., |
| Yasushi Yokosuka | 2nd Dept., Systems Research, Hitachi Research Lab., |
| Noriharu Amiya | Signaling Systems Design Dept., Mito Transportation System Product Div., |
| Yoshihide Nagatsugu | Rolling Stock Electrical Systems Design Dept., Mito Transportation System Product Div., |
| Eiji Sasaki | Signaling and Power Supply Systems Engineering Dept., Transportation Systems Div., |
We have developed signaling systems to increase the transportation capacity and ease rush-hour traffic in metropolitan areas. This is achieved by using an on-board controller that generates a parabolic braking pattern according to the limit of movement authority (LMA) transmitted from digital field controllers. One system is called "the digital ATC" (D-ATC) and it is now being tested for commercial operation. The field controllers calculate the LMA by using a track circuit unit and transmit digital signals to track circuits. The on-board controller generates a parabolic braking pattern according to the LMA and recognizes its own location. The other system, ATACS, is a radio-communication-based signaling system that makes full use of radio communication technologies. An on-board controller in this system recognizes the location of trains without using track circuits. Field controllers track the location of trains and calculate the LMA based on the train location obtained through radio transmission. The on-board controller generates a brake pattern according to the LMA received from the field controllers. This system enables moving-block signaling for high-density traffic control. We are planning to develop advanced signaling systems based on these systems.
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The Hitachi Hyoron (Japanese Only) |
ATC, ATACS, railway, railway signaling, D-ATC, signaling system
