IEEE 1474.4-2025

This recommended practice establishes a preferred approach for functional testing of a communications-based train control (CBTC) system.

The purpose of this recommended practice is to define a preferred sequence and extent of off-site and on-site functional testing for CBTC systems with the objective of maximizing test efficiency and effectiveness. It must be noted that there are functions and features that may require further analysis before considering the system as fully tested.

Revision Standard - Active. A preferred approach for functional testing of a communications-based train control (CBTC) system, based on the CBTC system design and functional allocations as defined in IEEE Std 1474.3™-2025, is established in this recommended practice.