A Safety Management and Signaling System Integration Method for Communication-Based Train Control System

Abstract

The safety and the correctness of signaling system not only relate to the safety and efficiency of the rail transit operation, but also link with the life safety of passengers. In order to guarantee the safety of a signaling system for metro, the safety certificate for the trial operation with carrying passengers must be obtained. In this paper, a suitable safety management and signaling system integration model are explored according to the CENELEC standards and applied in China. With taking account of the strict safety requirements for the Communication-Based Train Control (CBTC) system, a safety assurance and assessment method based on safety verification and validation process was put forward. This method was applied in every phase of the CBTC system development life cycle to monitor and control each activity in the life cycle and to review each document in system development process. At the same time, this method is also used to ensure the traceability of relevant documents and to test all the functions of the whole system sufficiently and completely. So that the safety operation of train control system can be ensured. Up to now, the independently developed CBTC system with the safety management had been applied in many urban rail transit lines of Beijing, such as Yizhuang Line, Changping Line, Line No. 14, and Line No. 7. The CBTC signaling systems of these projects have been authorized by the safety certification from a third party, e.g., Lloyd Register which is a British company and famous for the safety verification and validation process.

Keywords

Rail transit system / CBTC / Safety management / Signaling system / Safety verification and validation / System safety assurance

References

[1] Yan F, Tang T. Development of safety technology of rail transit signaling system and the research status of foreign countries. J China Saf Sci J, 2005, 15(6): 94-99.

[2] Gao CH. Research on the core technology of independent innovation CBTC system. J Modern Urban Rail Transit, 2014, 24(1): 7-10.

[3] IEC61508-2010 Functional safety of electrical/electronic/programmable electronic safety-related systems

[4] Society of Automotive Engineers (SAE) (1996) Guidelines and methods for conducting the safety assessment process on civil airborne systems and equipment (ARP4761). SAE International: Warrendale, PA. [Aerospace Recommended Practice]

[5] IEC 62278-2002 Railway applications—specification and demonstration of reliability, availability, maintainability and safety (RAMS)

[6] IEC 62279-2002 Railway applications—communications, signalling and processing systems—software for railway control and protection systems

[7] IEC62425-2007 Railway applications—communication, signalling and processing systems—safety related electronic systems for signalling

[8] RSSB (2011) Safety risk model risk profile bulletin (version 7) [R]. http://www.rssb.co.uk/risk-analysis-and-safety-reporting/risk-analysis/safety-risk-model-(srm)

[9] European Commission-2004 (2004) Safety management in railway, WP.2.2.2: guidance for the safety management system

[10] EI Koursi EM, Tordai L (2003) SAMNET: Safety management and interoperability thematic network in railway systems. WCRR2003, Edinburgh, pp 198–202

[11] Common safety targets, common safety indicators and common safety methods. A joint paper of the Safety Systems Harmonisation Working Group and the Technical Interfaces Working Group of the UIC Safety Platform, Sept’2002

[12] CENELEC EN50129-1999 (2003) Railway applications:safety related electronic systems for signalling [S]

[13] CENELEC EN50126-1999 (1999) Railway applications:the specification and demonstration of reliability ,availability,maintainability and safety (RAMS) [S]

[14] Tang T, Niu YM, Gao CH. Research and innovation of CBTC system for rail transit. J Munic Technol, 2010, S2: 349-353.

[15] Yan F, Gao CH, Tang T. Safety management and assessment mode research for rail transit signalling engineering project. Urban Rapid Rail Transit, 2011, 24(4): 12-16.

[16] Gao CH, Yan F, Tang T. Research on safety assessment method of rail transit signaling system. J China Saf Sci J, 2005, 15(10): 74-79.

[17] Morisio M (2000) Commercial-off-the-shelf (COTS): a survey a DACS state-of-the-art report[R]

Funding

Beijing Municipal Commission of Education(W16H100030)