This Federal Register notice announces that on September 2, 2025, Long Island Rail Road (LIRR) submitted a request for amendment (RFA) to its FRA-certified Positive Train Control (PTC) system. The RFA seeks FRA approval to establish an ACSES Construction Zone area within LIRR's Advanced Civil Speed Enforcement System II (ACSES II) to accommodate a modified interlocking and yard configuration. The Federal Railroad Administration invites public comment through October 2, 2025. This is a procedural notice; no environmental impact analysis is contained in this document.12