WABASH RAILROAD
MANUAL, AUTOMATIC, AND INTERLOCKING SIGNALS
JUNE 1, 1922
TRAIN ORDER AND MANUAL BLOCK SIGNALS
THREE POSITION UPPER QUADRANT PERMISSIVE AUTOMATIC SIGNAL
THREE POSITION UPPER QUADRANT ABSOLUTE AUTOMATIC SIGNAL
ONE ARM THREE POSITION UPPER QUADRANT INTERLOCKING SIGNAL
TWO ARM THREE POSITION UPPER QUADRANT INTERLOCKING SIGNAL
THREE ARM THREE POSITION UPPER QUADRANT INTERLOCKING SIGNAL (1)
THREE ARM THREE POSITION UPPER QUADRANT INTERLOCKING SIGNAL (2)
ONE ARM MECHANICAL DISTANT INTERLOCKING SIGNAL LOCATED IN NON-AUTOMATIC TERRITORY
ONE ARM INTERLOCKING DWARF SIGNAL
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