Action
Notice of availability and request for comments.
Summary
This document provides the public with notice that, on October 3, 2025, National Railroad Passenger Corporation (Amtrak) submitted two requests for amendment (RFA) to its FRA-certified positive train control (PTC) system, the Interoperable Electronic Train Management System (I-ETMS), in order to perform stability and reliability upgrades to its I-ETMS back office subsystem. FRA is publishing this notice and inviting public comment on the railroad's RFAs to its PTC system.