(under the class definition) Systems and devices which include any arrangement of train-controlling means--such as signals, derails, interlocking, automatic stops, etc., --designed to prevent collisions where two or more lines of railway cross at grade.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118, for similar systems used at drawbridges.
125, 260, 293, and 473, and appropriate indented subclasses for signal structure.
465, and the subclasses indicated in the search notes appended thereto, for the structure of the crossing.
