(57) Transmitter and receiver units (28, ..., 31, 32 ..., 35) each connected to corresponding
one of a plurality of sections (37 ..., 42; 43 ..., 48) of an information transmission
line (36), information transmission units (24, 25; 26, 27), control-processing unit
(22; 23) and a single administration-processing unit (21) are arranged to form a hierarchy
structure. The administration-processing unit (21) monitors the operation of the whole
system and supplies to the control-processing units (22; 23) information relating
to a train service schedule of a group of trains, a modified train service schedule
to meet a change in demand, etc., and the control-processing units (22; 23) performs
the traffic control of each train.
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