interlocking system definition
interlocking system means any lever or collection of levers, or electrical and mechanical devices, or electrical devices, that operate or control points and signals, or signals, at locations where trains can be directed from one track to another and that are interlocked to prevent conflicting movements of trains.
interlocking system means devices which keep the storage tank sealed unless the vapor hose is connected or which prevent delivery of fuel until the vapor hose is connected.