Summary: This document provides the public with notice that, on February 28, 2023, Brightline Trains Florida, LLC (BLF) submitted its Positive Train Control Safety Plan (PTCSP), Version 1.0, dated January 30, 2023, to FRA's Secure Information Repository. BLF asks FRA to approve its PTCSP and certify BLF's Interoperable Electronic Train Management System (I-ETMS) as a mixed PTC system.