IEEE 1474.1-2025

Current Revision
IEEE Standard for Communications-Based Train Control (CBTC) Performance and Functional Requirements

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IEEE 1474.1-2025

IEEE Standard for Communications-Based Train Control (CBTC) Performance and Functional Requirements

PUBLISH DATE 2025
PAGES 61
IEEE 1474.1-2025

Revision Standard - Active.

Performance and functional requirements for a communications-based train control (CBTC) system are established in this standard.

A CBTC system is a continuous, automatic train control system utilizing high-resolution train location determination, independent of track circuits; continuous, high-capacity, bidirectional train-to-wayside data communications; and train-borne and wayside processors capable of implementing automatic train protection (ATP) functions, as well as optional automatic train operation (ATO) and automatic train supervision (ATS) functions.

In addition to CBTC functional requirements, this standard also defines headway criteria, system safety criteria, and system availability criteria for a CBTC system.

This standard is applicable to the full range of transit applications including automated people movers.

This standard establishes a set of performance and functional requirements necessary for enhancing performance, availability, operations, and train protection using a CBTC System.

This standard establishes a set of performance and functional requirements necessary for enhancing performance, availability, operations, and train protection using a CBTC system.

There are currently no independent standards defining the performance and functional requirements to be satisfied by CBTC systems.

This standard enhances performance, availability, operations, and train protection, and facilitates new CBTC applications.

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