{"abstract":"This rule revises the definition of a non-traversable curb in FRA's train horn regulation in conformance with five longstanding FRA waivers that allow highway speeds up to 45 miles per hour (mph) where these highway curbs are present in quiet zones established and maintained in accordance with the regulation.","action":"Final rule.","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/2026/04/28/2026-08258.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"222","title":49}],"citation":"91 FR 22738","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective May 28, 2026.","disposition_notes":null,"docket_ids":["Docket No. FRA-2025-0120","Notice No. 2"],"dockets":[],"document_number":"2026-08258","effective_on":"2026-05-28","end_page":22740,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/04/28/2026-08258.xml","html_url":"https://www.federalregister.gov/documents/2026/04/28/2026-08258/regulatory-relief-to-allow-speeds-up-to-45-mph-for-non-traversable-curbs","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-08258?publication_date=2026-04-28","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-04-28/2026-08258/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":27,"last_updated":"2026-04-28 10:15:06 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-04-28/pdf/2026-08258.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-08258.pdf?1777293917","publication_date":"2026-04-28","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/04/28/2026-08258.txt","regulation_id_number_info":{"2130-AD14":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2130-AD14/regulatory-relief-to-allow-speeds-up-to-45-mph-for-non-traversable-curbs","title":"Regulatory Relief to Allow Speeds Up to 45 MPH for Non-Traversable Curbs","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=2130-AD14&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2130-AD14"],"regulations_dot_gov_info":{"supporting_documents":[],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2130-AD14/regulatory-relief-to-allow-speeds-up-to-45-mph-for-non-traversable-curbs","title":"Regulatory Relief to Allow Speeds Up to 45 MPH for Non-Traversable Curbs"},"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-2025-0120","supporting_documents_count":0,"docket_id":"FRA-2025-0120","document_id":"FRA-2025-0120-0005","regulation_id_number":"2130-AD14","title":"Regulatory Relief to allow Speeds of Up to 45 MPH at Non-traversable Curbs","checked_regulationsdotgov_at":"2026-04-28T14:04:43Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":22738,"subtype":null,"title":"Regulatory Relief To Allow Speeds Up to 45 MPH for Non-Traversable Curbs","toc_doc":"Regulatory Relief to Allow Speeds Up to 45 MPH for Non-Traversable Curbs","toc_subject":null,"topics":["Administrative practice and procedure","Railroad safety"],"type":"Rule","volume":91}