This is a procedural notice, not a NEPA document. The Federal Railroad Administration published a notice of availability and request for public comments on Capital Metropolitan Transportation Authority's (CMTY) request for amendment (RFA) to its FRA-Approved Positive Train Control Safety Plan. The RFA, submitted August 7, 2025, seeks approval to increase the overspeed warning point for CMTY's diesel multiple units and update certain cab signal rates. No environmental impacts or alternatives are analyzed; this is a railroad safety regulatory proceeding under 49 CFR 236.1021.12