Crossrail C660

Project Overview

Crossrail C660: SISS & Telecommunications Systems Integration

Employer: Siemens / Crossrail
Sector: Rail, SISS, Telecommunications, Major Projects
Location: London, UK
Role: Project Engineer /
Period: September 2013 – March 2022

Executive Summary

The Crossrail C660 contract formed a critical part of the Elizabeth Line’s central section, encompassing the design, integration, and assurance of all Station Information and Security Systems (SISS) and telecommunications infrastructure. As a Project Engineer, I was responsible for leading technical delivery, multi-discipline integration, and operational readiness, ensuring the system’s resilience and compliance for one of Europe’s most ambitious rail infrastructure programmes.

Objectives / Challenge

Deliver full SISS and telecoms system integration across the newly constructed underground and surface stations of the Elizabeth Line.

Achieve strict compliance with Crossrail, Network Rail, and TfL standards (NR/L2/TEL, LU standards, EN50126/8/9).

Manage technical interfaces and integration between SISS subsystems (CCTV, PAVA, CIS, Help Points), legacy assets, and new build infrastructure.

Ensure future-proofing and operational resilience to support 24/7 passenger and operational communications.

Approach / Solution

  • Technical Integration:
    • Led multi-disciplinary engineering teams to integrate SISS components (CCTV, PAVA, CIS, Help Points, access control) with fibre optic backbone and existing legacy systems.
    • Produced and validated system architecture diagrams, Interface Control Documents (ICDs), and FAT/SAT test schedules.
    • Implemented robust network segmentation and cyber resilience measures, in line with best practices for critical infrastructure.
  • Stakeholder Management:
    • Coordinated with Crossrail, Siemens, station contractors, Network Rail, and Transport for London (TfL) to resolve complex technical and delivery challenges.
    • Facilitated technical workshops and interface meetings to maintain alignment and resolve integration issues in real time.
  • Compliance & Assurance:
    • Oversaw RAMS (Reliability, Availability, Maintainability, Safety) documentation, safety case preparation, and traceability matrices.
    • Managed assurance evidence collation and responded to independent safety assessor (ISA) queries to secure project sign-off.
  • Operational Readiness:
    • Developed and delivered O&M handover packs, training materials, and on-site support to enable seamless transition to operational teams.
    • Supported trial operations, system migration, and initial revenue service phases.

Outcomes / Results

Successful Delivery:

  • Achieved integrated SISS and telecoms commissioning on time for central section opening, supporting staged entry into revenue service.

Resilience & Future-Proofing:

  • Designed with future scalability and digital resilience, ensuring long-term support for Elizabeth Line operations and future upgrades.

Compliance:

  • Full compliance with all statutory, Crossrail, Network Rail, and LU requirements, passing third-party audits and ISA reviews with minimal findings.

Stakeholder Recognition:

  • Commended for effective stakeholder engagement and proactive resolution of interface risks, minimising rework and schedule delays.

Innovation:

  • Implemented digital documentation and asset management approaches, streamlining assurance and facilitating lifecycle support.

Key Technologies & Methodologies

  • SISS subsystems: CCTV, PAVA, CIS, Help Points, Access Control
  • Fibre optic backbone (SDH/PDH, Ethernet)
  • Network segmentation & cybersecurity best practices
  • System integration (FAT, SAT, dynamic testing)
  • RAMS, safety case, and assurance evidence management
  • Standards: EN50126/8/9, NR/L2/TEL, LU SISS requirements
  • Stakeholder management (Crossrail, Siemens, TfL, Network Rail)

Ready to Accelerate Your Project?

Discover how M³Eng can deliver technical excellence, innovative solutions, and assured outcomes for your next infrastructure project.

Scroll to Top