{"abstract":"This document amends the Federal motor vehicle safety standard No. 224, \"Rear impact protection\" (FMVSS No. 224), to exclude road construction controlled horizontal discharge semitrailers (RCC horizontal discharge trailers) from the requirements of the standard. The RCC horizontal discharge trailers are used in the road construction industry to deliver asphalt to construction sites and gradually discharge asphalt mix into the paving machines overlaying the road surface. The agency has concluded that installation of the rear impact guards, as required by FMVSS No. 224, on RCC horizontal discharge trailers would interfere with their intended function and is therefore impracticable due to the unique design and purpose of these vehicles.","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":"National Highway Traffic Safety Administration","name":"National Highway Traffic Safety Administration","id":345,"url":"https://www.federalregister.gov/agencies/national-highway-traffic-safety-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/345","parent_id":492,"slug":"national-highway-traffic-safety-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2004/11/19/04-25703.html","cfr_references":[{"chapter":null,"citation_url":null,"part":571,"title":49}],"citation":"69 FR 67663","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective Date: This rule is effective December 20, 2004.","disposition_notes":null,"docket_ids":["Docket No. NHTSA-2004-19033"],"dockets":[],"document_number":"04-25703","effective_on":"2004-12-20","end_page":67668,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2004/11/19/04-25703.xml","html_url":"https://www.federalregister.gov/documents/2004/11/19/04-25703/federal-motor-vehicle-safety-standards-rear-impact-guards-final-rule","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/04-25703?publication_date=2004-11-19","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2004-11-19/04-25703/mods.xml","not_received_for_publication":null,"page_length":6,"page_views":{"count":525,"last_updated":"2026-10-24 18:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2004-11-19/pdf/04-25703.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2004-11-19","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2004/11/19/04-25703.txt","regulation_id_number_info":{"2127-AI56":{"issue":"200404","html_url":"https://www.federalregister.gov/regulations/2127-AI56/horizontal-discharge-trailers","title":"Horizontal Discharge Trailers","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=200404&RIN=2127-AI56&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2127-AI56"],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T14:07:57Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":67663,"subtype":null,"title":"Federal Motor Vehicle Safety Standards; Rear Impact Guards; Final Rule","toc_doc":"Rear impact protection; road construction controlled horizontal discharge semitrailers; exclusion from standard","toc_subject":"Motor vehicle safety standards:","topics":[],"type":"Rule","volume":69}