The concept of movement safety in a string transportation system

Aim. To examine the structure and safety components of existing transportation systems to use them as the foundation for the study of the whole set of hazards and threats that are typical for innovative string rail transportation. To identify specific conditions and functions of efficient and safe movement of rail vehicles in order to enable the definition of the requirements for the automated traffic management system under development. Methods. The authors analyse the regulatory documents dealing with the safety of existing transportation systems, as well as the conditions and functions associated with ensuring the safety of rail vehicles. The paper examines the matter of completeness and correctness of the proposed functions, distinctive features of their implementation required by various standards. Results. The authors propose a set of basic elementary functions of rail vehicle movement that are used for constructing detailed algorithms of operation of a string transportation systems. Comments are given regarding the implemented functionalities. The authors propose a terminology of string transportation system safety and its components interrelation, i.e., operational safety, functional safety, and movement safety. Conclusion. The proposed terminology and set of basic movement safety functions allow organising the development of a modern safe automated traffic management system. The use of elementary incompatible movement safety functions allows for their modular (independent) implementation and minimisation. That helps reduce the efforts associated with the development and confirmation of compliance of the automated management system with the relevant requirements.

1. IEC 61508-2010 Functional safety of electrical/electronic/programmable electronic safety-related systems.

2. TR CU 001/2011. On the safety of railway rolling stock: Technical Regulations of the Customs Union / Eurasian Economic Union. Effective since 2014-08-02. Minsk: Gosstandart: BelGISS; 2012. (in Russ.).

3. TR CU 003/2011. On the safety of railway infrastructure: Technical Regulations of the Customs Union / Eurasian Economic Union. Effective since 2014-08-02. Minsk: Gosstandart: BelGISS; 2012. (in Russ.).

4. TR CU 018/2011. On the safety of wheeled vehicles: Technical Regulations of the Customs Union / Eurasian Economic Union. Effective since 2015-01-01. (accessed 05.04.2024). Available at: https://eec.eaeunion.org/upload/medialibrary/2a3/TR-TS-018_2011.pdf. (in Russ.).

5. Unitsky A.E. [String transportation systems: on Earth and in Space]. Silakrogs: PNBprint; 2019. (in Russ.).

6. [A new level. How overhead railways can solve the problem of traffic jams]. (accessed 25.11.2023). Available at: https://www.fontanka.ru/longreads/72841475/?erid=Kra246Hbk. (in Russ.).

7. Kraskovsky A.E. [What is meant by the term traffic safety?]. Zheleznodorozhny transport 1996;9:39-41. (in Russ.).

8. Pishchik F.P. [Railway traffic safety: a textbook]. Gomel: BelGUT; 2009. (in Russ.).

9. Gapanovich V.A., Galiev I.I., Matyash Yu.I., Klyuka V.P. [Advanced technologies for train protection and cargo safety: a monograph]. Moscow: [State Educational Institution Railway Transportation Training Centre]; 2008. (in Russ.).

10. Zamyshliaev A.M. [Applied information systems for managing dependability, safety, risks, and resources in railway transportation]. Ulianovsk: Oblastnaya tipografia Pechatny dvor; 2013. (in Russ.)

11. GOST R 55056-2012 Railway transport. General. Terms and definitions (standard abolished). Moscow: Standartinform; 2013. (in Russ.).

12. GOST R 34530-2019 Railway transport. General. Terms and definitions. Moscow: Standartinform; 2019. (in Russ.).

13. GOST 33894-2016 Railway automatics and telemechanics systems on railway stations. Safety requirements and methods of checking. Мoscow: Standartinfrom; 2019. (in Russ.).

14. GOST 33895-2016 Railway automatics and telemechanics systems on stages of railroad lines. Safety requirements and methods of checking. Мoscow: Standartinfrom; 2019. (in Russ.).

15. IEEE 1474.1-2004 Standard for CommunicationsBased Train Control (CBTC) Performance and Functional Requirements.

16. IEC 62290-1:2014, Railway applications – Urban guided transport management and command/control systems – Part 1: System principles and fundamental concepts.

17. ANSI / ASCE / T & DI 21 – 2021 Automated People Mover Standards.

18. GOST R 70059-2022 Management and command/ control systems for suburban railway passenger transport. Construction principles and general functional requirements. Moscow: Russian Standardization Institute; 2022. (in Russ.).

19. Performance Specification for a Turnkey Mass Transit Monorail System. IMA; 2022. 20. Schӓbe H. Autonomous Driving – How to Apply Safety Principles. Dependability 3;3:21-33.

20. Leaflet R817. [Operational and technical requirements for open line train separation systems. The OSJD Committee. Warsaw. Effective date: October 21, 2016]. (in Russ.).

21. IEEE 1474.3-2008 Recommended Practice for Communications-Based Train Control (CBTC). System Design and Functional Allocations.

22. EN 13452-1:2003 Railway applications. Braking. Mass transit brake systems – Part 1: Performance requirements.

23. [Federal Law of the Russian Federation On Transportation Security dated 09.02.2007 no. 16-FZ]. Collection of Legislation of the Russian Federation 2007;7;837. (in Russ.)

24. GOST 33432-2015. Functional safety. Policy and programm of safety provision. Safety proof of the railway objects. Moscow: Standartinform; 2019. (in Russ.)

25. EN 50126-1:2017 Railway Applications – The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) – Part 1: Generic RAMS Process.

26. Shubinsky I.B., Rozenberg E.N. [Functional safety of control systems in railway transportation]. Moscow, Vologda: Infra-Inzheneria; 2023. (in Russ.).