This document applies to new and modified lineside signals, indicators and signal signage. The document covers materials, design, construction, testing, commissioning and maintenance of lineside signals, indicators and signal signage. Interfacing systems such as cab signalling, train protection, and electric traction infrastructure are not covered by this standard unless specifically related to lineside signals. Hazards addressed by this standard are identified from the RISSB Hazard Register Guideline. The hazards and controls should be used as a guide when undertaking risk assessments, prior to the introduction of the standard into an organisation.