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APOD Full Session Abstract

Safety, Security, and Standards

1664989 - ATS Safety Certification in Texas

Monday, June 17, 2024
3:15 PM - 4:30 PM ET
Room: 222
Abstract:

Presented is safety certification for a hypothetical 2.5 second headway smart gondola ATS in the Dallas area. Perspectives from the NCTCOG, TxDOT Rail Safety Section, Dallas Area Rapid Transit (DART) Rail Transit Agency staff, Swyft Cities (private sector smart gondola vendor), and SCJ Alliance (an independent safety certification consultant) are provided. In pursuit of a win-win-win, public sector considerations for deployment are explored. 


A Texas implementation of the chain of applicable standards is described:  



  • FTA 49 CFR Part 674 covers State Safety Oversight of Rail Fixed Guideway Systems.



  • Texas’ Rail Fixed Guideway System State Safety Oversight Program is implemented in Title 43, Part 1, Chapter 7, Subchapter E.



  • The overarching standard, ASCE 21-21 - Automated People Mover Standards, defines the 



  • System Safety Program. 



  • The control system follows IEEE 1474 - Standards for Communications Based Train Control. 



  • Emergency systems conform to NFPA 130 - National Fire Protection Association Standard for Fixed Guideway Transit and Passenger Rail Systems. 



  • Foundations and structures follow state & local Building Codes. 



  • Accessibility conforms to the 2010 American Disabilities Act’s Standards for Accessible Design including CFR 49 for seating, signage. 



  • Smart gondola cableway safety requirements conform to ANSI (American National Standards Institute) B77.1-17: Safety Requirements for Aerial Tramways, Aerial Lifts, Surface Lifts, Tows and Conveyors. 





ASCE 21-21 encompasses: 



  • passenger operation, including security



  • ATS vehicle separation assurance



  • independent safety certification



  • operational monitoring and auditing



  • maintenance and training



  • inspection and testing



  • system verification and demonstration 



  • process for acceptance of a system application



  • working safely near ATS systems



  • emergency egress.





The following topics are covered: 



  • Metrics including service availability and Mean Time Between Hazard Event.  



  • Fail-safe design including the use of IEC 61508 Safety Integrity Level 3 (SIL 3) components. 



  • Anomalous operations scenarios of interest.  



  • Preliminary hazard analysis & mitigation.  



  • Public sector considerations for deployment.


Learning Objectives:

Attendees can expect to learn the following from this session:
  • compare and contrast the perspectives of five different organizations involved in Texas ASCE 21-21 safety certification.
  • understand hazard analysis and hazard mitigation of ATS systems.
  • understand operational considerations for safe operation of ATS systems.