Table 1 Relevant groups of railway infrastructure facilities.

From: Inspection of railway catenary systems using machine learning with domain knowledge integration

Infrastructure

Description

Class names

Support structures

Individual and group structures such as frames and poles

Pole, horizontal bar

Registration arms/cantilevers

Load-bearing structure attaching the suspension line to the substructure

Mount

Insulators

Insulators used in cantilevers and in the mounting of section power cables

Insulator

Power switches and disconnectors

Equipment to disconnect the power supply to a section of the overhead line

Electrical component

Railroad switches

Railroad switch

Semaphore

Colour light signal

Semaphore