{"url_path":"/register/2026-07-16/2026-14335","section_key":"summary","section_title":"Massachusetts Bay Transportation Authority's Request To Amend its Positive Train Control System","topic":"register","document":{"doc_type":"Notice","doc_date":"2026-07-16","source_url":"https://www.federalregister.gov/documents/2026/07/16/2026-14335/massachusetts-bay-transportation-authoritys-request-to-amend-its-positive-train-control-system","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"Transportation Department"},"word_count":71,"has_tables":false,"body_markdown":null}