{"abstract":"The National Highway System (NHS) was established by the National Highway System Designation Act of 1995 (NHS Act), Pub. L. 104- 59, 109 Stat. 568. In order to reflect the establishment of the NHS, the FHWA is revising several areas of the text in its regulation at 23 CFR part 625 governing design standards for highways; updating the listing of standards; relocating the guides and references; and adopting as its policy for the design standards which apply to highway construction and reconstruction projects on the NHS, a 1994 revision of the American Association of State Highway and Transportation Officials' (AASHTO) publication, ``A Policy on Geometric Design of Highways and Streets'' (AASHTO 1994 Policy). The primary reason for development of the new AASHTO 1994 Policy was to convert the numerical values in AASHTO's 1990 Policy to the metric system (SI). With the recent enactment of the NHS Act, the Secretary of the Department of Transportation (Secretary) cannot require that any State use, or plan to use, the metric system for Federal-aid projects before September 30, 2000. However, almost all of the States continued their conversion to metric to meet the previously established deadline of September 30, 1996, and are either awarding contracts in metric or plan to do so in the near future.","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 Highway Administration","name":"Federal Highway Administration","id":170,"url":"https://www.federalregister.gov/agencies/federal-highway-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/170","parent_id":492,"slug":"federal-highway-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/1997/04/01/97-8197.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"625","title":23}],"citation":"62 FR 15392","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective May 1, 1997. The incorporation by reference of certain publications listed in the regulation is approved by the Director of the Federal Register as of May 1, 1997.","disposition_notes":null,"docket_ids":["FHWA Docket No. 95-12"],"dockets":[],"document_number":"97-8197","effective_on":"1997-05-01","end_page":15398,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":null,"html_url":"https://www.federalregister.gov/documents/1997/04/01/97-8197/design-standards-for-highways-geometric-design-of-highways-and-streets","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/97-8197?publication_date=1997-04-01","mods_url":"https://www.govinfo.gov/metadata/granule/FR-1997-04-01/97-8197/mods.xml","not_received_for_publication":null,"page_length":7,"page_views":{"count":165,"last_updated":"2026-08-24 22:15:11 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-1997-04-01/pdf/97-8197.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"1997-04-01","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/1997/04/01/97-8197.txt","regulation_id_number_info":{"2125-AD38":{"issue":"199704","html_url":"https://www.federalregister.gov/regulations/2125-AD38/design-standards-for-highways-a-policy-on-geometric-design-of-highways-and-streets-design-and-constr","title":"Design Standards for Highways; A Policy on Geometric Design of Highways and Streets; Design and Construction Criteria","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=199704&RIN=2125-AD38&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2125-AD38"],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":15392,"subtype":null,"title":"Design Standards for Highways; Geometric Design of Highways and Streets","toc_doc":null,"toc_subject":null,"topics":[],"type":"Rule","volume":62}