The Office of the National Rail Safety Regulator (Regulator) has now published the National Network for Interoperability (NNI), confirming the metropolitan and interstate corridors that comprise Australia’s core interoperable rail network. From 28 February 2026, accredited rail infrastructure managers that form part of the NNI and accredited rolling stock operators with accreditation to operate on it, will be required to consider interoperability when planning changes to their operations on that network. These announcements were published as a public notice in the South Australian Government Gazette and included under regulation 16(3) of the Rail Safety National Law Regulations 2012.
This article outlines the scope of the NNI, the immediate regulatory implications, and practical next steps for industry.
What the National Network for Interoperability is
The NNI defines the major freight and passenger railways connecting Australia’s ports, regions and passenger terminals. It has been established by the Regulator following the unanimous approval of the responsible Ministers under the Rail Safety National Law. The network is identified by map and description and is intended to facilitate safe and seamless operations across jurisdictional boundaries and between different operators.
Metropolitan operations included
The published description captures key metropolitan corridors in Australia’s major cities, reflecting the interfaces between interstate freight movements, metropolitan terminals and ports.
Beyond the metropolitan areas, the National Network for Interoperability comprises the standard (or dual) gauge running lines connecting the interstate spine and key intrastate links. These include, among others, Crystal Brook to Perth; Tarcoola to Darwin; Whyalla to Port Augusta; Crystal Brook to Sydney via Broken Hill, Parkes and Lithgow; Crystal Brook to Adelaide; Adelaide to Melbourne via Geelong; Melbourne to Sydney via Albury, Cootamundra and Macarthur; Moss Vale to Sydney via Wollongong and Port Kembla; and Sydney to Brisbane via Newcastle and Maitland.
Regulatory implications and timing
From 28 February 2026, accredited rail infrastructure managers that form part of the NNI, and accredited rolling stock operators with accreditation to operate on it, must have systems and procedures to consider interoperability when making changes to their railway operations on that network. This aligns with the broader regulatory programme to embed interoperability into safety management and planning, and is intended to support safe, reliable and efficient cross-network operations.
Looking ahead
Publication of the NNI provides clarity on the corridors where interoperability must be embedded into operational change processes. With the application date approaching, operators should move promptly to ensure their systems and processes comply with the requirements for operating on the NNI. The Regulator has indicated they are preparing to shortly release the final Interoperability of Railway Operations Guideline, and we will provide further updates when this becomes available.
Please contact Larissa Buriak and Chris Mitchell for additional information.
