Amtrak Advanced Civil Speed Enforcement System II (ACSES II) Positive Train Control Safety Plan Amendment

Amtrak's Request To Amend Its Positive Train Control Safety Plan and Positive Train Control System

This is a notice of availability and request for public comment on Amtrak's February 9, 2026 request for amendment (RFA) to its FRA-approved Positive Train Control Safety Plan (PTCSP) for its Advanced Civil Speed Enforcement System II (ACSES II). The RFA seeks FRA approval for updated ACSES II hardware and software to support system reliability improvements. This is a procedural notice under 49 CFR 236.1021; it is not a NEPA environmental review document and contains no environmental impact analysis.

The National Railroad Passenger Corporation's Request To Amend Its Positive Train Control Safety Plan and Positive Train Control System

This is a notice of availability and request for public comments on Amtrak's November 21, 2024 request for amendment (RFA) to its FRA-approved Positive Train Control Safety Plan (PTCSP) for its Advanced Civil Speed Enforcement System II (ACSES II). The RFA seeks FRA approval to increase the system maximum operational speed from 150 MPH to 160 MPH. This is not a NEPA document; it is a procedural notice under 49 CFR 236.1021(e) inviting public comment by December 23, 2024. No environmental impacts or alternatives are analyzed.