IEEE P1474.3_D11.0, Jan 2008
Based Train Control (CBTC) System Design and Functional Allocations
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About This Item
P1474.3_D11.0, Jan 2008 is a transportation standard focused on communications-based train control (CBTC) system design and functional allocations. It addresses how control functions are distributed within a CBTC architecture, helping clarify responsibilities between onboard, wayside, and supervisory elements. This matters because a well-defined allocation of functions supports safer operation, clearer engineering decisions, and more consistent implementation across rail signaling and control projects.
About P1474.3_D11.0, Jan 2008
This technical document appears to support CBTC system design by defining how key functions should be assigned within the overall control system. In practice, that can include control logic, train supervision, communication links, and related operational responsibilities. As an inactive standard, P1474.3_D11.0, Jan 2008 is most useful as a reference for understanding the design approach and functional boundaries expected in a CBTC environment. It helps organizations align specifications, engineering reviews, and system integration work around a common framework.
Where is P1474.3_D11.0, Jan 2008 used?
This standard is relevant in rail transit environments where CBTC is used to manage train movement with continuous communication between trains and infrastructure. It may be used by engineers, integrators, and procurement teams working on urban metro lines, signaling upgrades, or control-system planning. P1474.3_D11.0, Jan 2008 is especially useful when defining how functions are split across onboard equipment, trackside systems, and central traffic control components in a transportation setting.
Importance in practice
Functional allocation is a practical issue in CBTC projects because unclear responsibility between system elements can lead to design conflicts, integration errors, and testing delays. P1474.3_D11.0, Jan 2008 helps support more disciplined requirements development and verification by making the intended division of functions easier to trace. For transportation projects, that can improve safety, reduce ambiguity in contracts and technical reviews, and support consistent performance across the signaling system lifecycle.
- CBTC system design framework
- Functional allocation across subsystems
- Rail transit control and signaling context
- Integration and verification reference
- Transportation engineering specification
- Publication Date: 2008
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Transportation
- Official IEEE: Doi link
- New Version Available: P1474.3 (2025)
- Previous Version: P1474.3 (2024)
- Previous Version: P1474.3 (2008)
- This Version: P1474.3 (2008)
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