CFR›Title 49›Subtitle B›Chapter VI›Part 670 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 PART 670—PUBLIC TRANSPORTATION SAFETY PROGRAM Subparts A Subpart A—General Provisions Sections 670.1–670.5 B Subpart B—Inspections, Investigations, Audits, Examinations and Testing Sections 670.11–670.13 C Subpart C—Authorities Sections 670.21–670.29 D Subpart D—National Public Transportation Safety Plan Section 670.31 Authority49 U.S.C. 5329, 49 CFR 1.91.Source81 FR 53058, Aug. 11, 2016, unless otherwise noted. Previous 665 Part 665—Bus Testing Next 671 Part 671—Rail Transit Roadway Worker Protection