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New Acceptance Standards for Metropolitan (Suburban) Railway Projects Released
According to the National Railway Administration, the agency recently issued an announcement on railway industry standards, revising the quality acceptance criteria for construction of five types of railway projects—railway power supply, traction power supply, communications, signaling, and passenger services—and introducing new acceptance requirements for projects involving new technologies, new equipment, and new operational models in metropolitan (suburban) railways, thereby establishing a comprehensive set of industry standards for the construction of such railway projects.
According to available information, in recent years, metropolitan areas such as the Guangdong–Hong Kong–Macao Greater Bay Area, the Yangtze River Delta, and the Beijing–Tianjin–Hebei Region have experienced rapid development, leading to increasingly strong public expectations for higher-quality rail transit services and greater convenience in intermodal transfers, as well as a more urgent desire for the integration of the four rail networks.
“The ‘Four-Network Integration’ refers to the convergence of trunk railways, intercity railways, metropolitan (suburban) railways, and urban rail transit—particularly the integration and seamless interconnection of metro systems with intercity and metropolitan (suburban) railways. In the context of rail transit, ‘four-network integration’ manifests as tangible hardware connectivity on the surface, while at a deeper level it entails coordinated institutional mechanisms that are less visible.”
To achieve coordinated mechanisms, the first step is to fill existing gaps. In 2020, the National Railway Administration issued the “Design Code for Metropolitan (Suburban) Railways,” which clearly defines the functional positioning and construction standards for such railways, thereby providing high-speed, high-capacity, bus-like transit services for commuter traffic within metropolitan areas. The second step is to standardize practices. Since 2024, the National Railway Administration has taken the Guangdong–Hong Kong–Macau Greater Bay Area as a pilot region, jointly issuing an implementation plan with Guangdong Province to strengthen cross-regional alignment of various rail transit standards. This effort comprehensively promotes uniformity of rolling stock, interconnection of infrastructure, mutual recognition of security inspections, interoperability of fare systems, and coordinated management, enabling the “four-line through-operation” of Guangdong’s intercity rail network and advancing the integration of the four rail networks.
According to the briefing, this revision of the standards is primarily intended to align with the aforementioned design specifications and further refine the relevant acceptance requirements, thereby providing standardized support for the quality acceptance of “four-network integration” construction projects. For instance, in terms of acceptance, five new acceptance standards have been issued, covering acceptance criteria for CBTC (Communication-Based Train Control), LTE (Long-Term Evolution), DC traction power supply, and other systems. These standards are designed to be used in conjunction with the previously released technical specifications for the static and dynamic acceptance of metropolitan (suburban) railway projects, thus meeting the needs of quality acceptance work for such projects.
A relevant official from the National Railway Administration stated that, with this development, the Administration has now established a comprehensive set of industry standards covering the “design–construction–acceptance” process for metropolitan (suburban) railways. These standards will accelerate the construction of metropolitan (suburban) rail networks within urban agglomerations, promote the integrated development of the four rail transit networks, further expand public transport service capacity, alleviate urban traffic congestion, and better support the implementation of major strategies for regional integration.
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