{"abstract":"This document provides the public with notice that, on July 22, 2026, the Massachusetts Bay Transportation Authority (MBTA) submitted a request for amendment (RFA) to its FRA-approved Positive Train Control Safety Plan (PTCSP).","action":"Notice of availability and request for comments.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Railroad Administration","name":"Federal Railroad Administration","id":185,"url":"https://www.federalregister.gov/agencies/federal-railroad-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/185","parent_id":492,"slug":"federal-railroad-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2026/08/03/2026-15674.html","cfr_references":[],"citation":"91 FR 48970","comment_url":null,"comments_close_on":"2026-08-24","correction_of":null,"corrections":[],"dates":"FRA will consider comments received by August 24, 2026. FRA may consider comments received after that date to the extent practicable and without delaying implementation of valuable or necessary modifications to a PTC system.","disposition_notes":null,"docket_ids":["Docket Number FRA-2010-0030"],"dockets":[{"supporting_documents":[],"agency_name":"FRA","documents":[{"comment_count":0,"comment_start_date":"2026-08-03","updated_at":"2026-08-25T00:05:45.490-04:00","comment_url":"https://www.regulations.gov/commenton/FRA-2010-0030-0142","allow_late_comments":false,"id":"FRA-2010-0030-0142","comment_end_date":"2026-08-25","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":0,"id":"FRA-2010-0030","title":"Massachusetts Bay Transportation Authority - Positive Train Control Plans"}],"document_number":"2026-15674","effective_on":null,"end_page":48970,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/08/03/2026-15674.xml","html_url":"https://www.federalregister.gov/documents/2026/08/03/2026-15674/massachusetts-bay-transportation-authoritys-request-to-amend-its-positive-train-control-safety-plan","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-15674?publication_date=2026-08-03","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-08-03/2026-15674/mods.xml","not_received_for_publication":null,"page_length":1,"page_views":{"count":82,"last_updated":"2026-09-21 20:15:12 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-08-03/pdf/2026-15674.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-15674.pdf?1785501917","publication_date":"2026-08-03","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/08/03/2026-15674.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[],"comments_count":0,"agency_id":"FRA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FRA-2010-0030","supporting_documents_count":0,"docket_id":"FRA-2010-0030","document_id":"FRA-2010-0030-0142","regulation_id_number":null,"title":"Massachusetts Bay Transportation Authority - Positive Train Control Plans","checked_regulationsdotgov_at":"2026-08-25T04:05:44Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":48970,"subtype":null,"title":"Massachusetts Bay Transportation Authority's Request To Amend Its Positive Train Control Safety Plan and Positive Train Control System","toc_doc":"Massachusetts Bay Transportation Authority; Positive Train Control Safety Plan and Positive Train Control System","toc_subject":"Request for Amendment","topics":[],"type":"Notice","volume":91}