[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR637.201] [Page 198] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 637_CONSTRUCTION INSPECTION AND APPROVAL--Table of Contents Subpart B_Quality Assurance Procedures for Construction Sec. 637.201 Purpose. Subpart A [Reserved] Subpart B_Quality Assurance Procedures for Construction Sec. 637.201 Purpose. 637.203 Definitions. 637.205 Policy. 637.207 Quality assurance program. 637.209 Laboratory and sampling and testing personnel qualifications. Appendix A to Subpart B--Guide Letter of Certification by State Engineer Authority: Sec. 1307, Pub. L. 105-178, 112 Stat. 107; 23 U.S.C. 109, 114, and 315; 49 CFR 1.48(b). Source: 60 FR 33717, June 29, 1995, unless otherwise noted. Editorial Note: Nomenclature changes to part 637 appear at 67 FR 75934, Dec. 10, 2002. Subpart A [Reserved] To prescribe policies, procedures, and guidelines to assure the quality of materials and construction in all Federal-aid highway projects on the National Highway System.