This is a procedural Federal Register notice from the Federal Railroad Administration (FRA) announcing that Amtrak submitted a Request for Amendment (RFA) on October 12, 2024, to its FRA-approved Positive Train Control Safety Plan (PTCSP) for its Advanced Civil Speed Enforcement System II (ACSES II). The amendment seeks approval to install Construction Zone transponders on the New Haven to Boston line to support the addition of Fitter Interlocking, which will temporarily suspend portions of the PTC system beginning December 7, 2024, for no more than 30 days. FRA invites public comment through November 13, 2024. This notice contains no environmental impact analysis.1