Recently, the pre-initial operation safety assessment of the signalling system for the Northern Extension of Phase II of the Shenzhen Urban Rail Transit Line 13 project was successfully concluded. As the signalling system supplier for this line, Traffic Control Technology Co., Ltd. (hereinafter referred to as "Traffic Control Technology") cooperated throughout the process with the expert panel in completing all-dimensional verification. The signalling system successfully passed the critical "major test" prior to passenger-carrying opening and has officially entered the countdown to initial operation.

01 Core Indicators Exceed Standards; System Functions Verified On-Site

This assessment was based on the trial operation summary report, and all core indicators of the signalling system met and exceeded the specification requirements.

All train operation safety functions covered by the specifications, including overspeed protection, tracking protection, door interlocking, obstacle detection, and sleep/wakeup, met the standards. On-site verification of the main/standby switchover of core equipment such as the Zone Controller (ZC), Object Controller (OC), and Computer Interlocking (CI), as well as train mode switching, all met the test requirements, and the equipment operated stably. The line is a Fully Automatic Operation (FAO) line. Full-process automatic functions in the automated area, including SPKS personnel protection, precise stopping, remote monitoring, and platform passenger clearance and isolation, all comply with industry standards, and the operating scenarios are mature and complete.

02 Rigorous Full-Process Verification in Strict Compliance with Industry Standards

This safety assessment strictly followed multiple authoritative national and rail transit industry standards, including the "Specification for Pre-Initial Operation Safety Assessment of Urban Rail Transit" and the "Technical and Management Specifications for Operation of Fully Automatic Operation Systems in Urban Rail Transit (Trial)," among other regulatory documents.

The expert panel adopted a dual verification model of "document review + on-site inspection": on the one hand, they reviewed item by item the complete set of technical documents, including the trial operation report, the 144-hour stability test, the third-party safety assessment, and the fully automatic function test, to verify the compliance of system construction; on the other hand, they went deep into the control center, the depot, the equipment rooms of all stations along the line, and the track areas to inspect the equipment installation status on site and conducted onboard actual measurements of the system's online operation performance, achieving all-dimensional verification of the signalling system with no blind spots. In response to the detailed optimization suggestions raised by the experts, the project team has completed rectification item by item and closed-loop implementation.

03 Key Milestone Achieved, Building a Solid Safety Foundation for Line Opening

The pre-initial operation safety assessment is a critical gate that a metro project must pass in transitioning from construction to passenger-carrying operation, and it is also a core prerequisite for ensuring passenger safety. The successful passage of this assessment means that the fully automatic operation signalling system built by Traffic Control Technology for this project is fully equipped for safe passenger-carrying operation: the system's operating performance across the entire line is excellent, the redundant switchover of software and hardware equipment is reliable, the fully automatic operation scenarios are fully implemented, and all on-site issue rectifications have been closed loop, comprehensively consolidating the foundation for high-quality line opening.

Next, the project team will continue to carry out follow-up concluding and support work, making every effort to safeguard the scheduled opening and operation of the Northern Extension of Phase II of Shenzhen Urban Rail Transit Line 13.