In a single wire with a single point attachment configuration, what is the wire that supports the signal head called?

In a single wire with a single point attachment configuration, the wire that supports the signal head is referred to as messenger wire. The messenger wire serves as a support line for the signal head, allowing it to be suspended above the intersection or roadway while maintaining proper positioning and stability. This type of configuration is often used in traffic signal installations where overhead mounting is necessary.

Messenger wire is typically a stronger and more durable wire designed to withstand environmental factors and the weights of the signal heads. Its primary function is to provide the necessary support structure while allowing for proper alignment and visibility of the signals to drivers and pedestrians.

The other options relate to different components or concepts associated with signal systems but do not accurately describe the wire that holds the signal head in this specific configuration. For example, support wire generally refers to wires used for structural support rather than direct attachment of signal equipment. Anchor wire might suggest a connection point for stability rather than the direct support of the signal itself. Signal wire typically pertains to the electrical conduction used to send signals rather than the physical support.