23 CFR 450.100 : Highways (§ 1.1 To Parts 1345-1399) — (§ 1.1 To Parts 1345-1399) — Federal Highway Administration, Department Of Transportation (§ 1.1 To Parts 974-999) — Planning And Research (§ 420.101 To § 490.213) — Planning Assistance And Standards (§ 450.100 To Appendix A To Part 450) — Transportation Planning And Programming Definitions (§ 450.100 To § 450.104) — Purpose.