• Part 1 [§ 1.1 - § 1.101] - PART 1—ORGANIZATION AND DELEGATION OF POWERS AND DUTIES

• Part 3 [§ 3.1 - § 3.1] - PART 3—OFFICIAL SEAL

• Part 5 [§ 5.1 - § 5.9] - PART 5—ADMINISTRATIVE PROCEDURES

• Part 6 [§ 6.1 - § 6.39] - PART 6—IMPLEMENTATION OF EQUAL ACCESS TO JUSTICE ACT IN AGENCY PROCEEDINGS

• Part 7 [§ 7.1 - § 7.46] - PART 7—PUBLIC AVAILABILITY OF INFORMATION

• Part 8 [§ 8.1 - § 8.31] - PART 8—CLASSIFIED INFORMATION: CLASSIFICATION/DECLASSIFICATION/ACCESS

• Part 9 [§ 9.1 - § 9.19] - PART 9—TESTIMONY OF EMPLOYEES OF THE DEPARTMENT AND PRODUCTION OF RECORDS IN LEGAL PROCEEDINGS

• Part 10 [§ 10.1 - § 10.85] - PART 10—MAINTENANCE OF AND ACCESS TO RECORDS PERTAINING TO INDIVIDUALS

• Part 11 [§ 11.101 - § 11.124] - PART 11—PROTECTION OF HUMAN SUBJECTS

• Part 15 [§ 15.1 - § 15.19] - PART 15—PROTECTION OF SENSITIVE SECURITY INFORMATION

• Part 17 [§ 17.1 - § 17.13] - PART 17—INTERGOVERNMENTAL REVIEW OF DEPARTMENT OF TRANSPORTATION PROGRAMS AND ACTIVITIES

• Part 18-19 - PARTS 18-19 [RESERVED]

• Part 20 [§ 20.100 - § 20.605] - PART 20—NEW RESTRICTIONS ON LOBBYING

• Part 21 [§ 21.1 - § 21.23] - PART 21—NONDISCRIMINATION IN FEDERALLY-ASSISTED PROGRAMS OF THE DEPARTMENT OF TRANSPORTATION—EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964

• Part 22 [§ 22.1 - § 22.69] - PART 22—SHORT-TERM LENDING PROGRAM (STLP)

• Part 23 [§ 23.1 - § 23.79] - PART 23—PARTICIPATION OF DISADVANTAGED BUSINESS ENTERPRISE IN AIRPORT CONCESSIONS

• Part 24 [§ 24.1 - § 24.603] - PART 24—UNIFORM RELOCATION ASSISTANCE AND REAL PROPERTY ACQUISITION FOR FEDERAL AND FEDERALLY-ASSISTED PROGRAMS

• Part 25 [§ 25.100 - § 25.605] - PART 25—NONDISCRIMINATION ON THE BASIS OF SEX IN EDUCATION PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE

• Part 26 [§ 26.1 - § 26.109] - PART 26—PARTICIPATION BY DISADVANTAGED BUSINESS ENTERPRISES IN DEPARTMENT OF TRANSPORTATION FINANCIAL ASSISTANCE PROGRAMS

• Part 27 [§ 27.1 - § 27.129] - PART 27—NONDISCRIMINATION ON THE BASIS OF DISABILITY IN PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE

• Part 28 [§ 28.101 - § 28.999] - PART 28—ENFORCEMENT OF NONDISCRIMINATION ON THE BASIS OF HANDICAP IN PROGRAMS OR ACTIVITIES CONDUCTED BY THE DEPARTMENT OF TRANSPORTATION

• Part 29 [§ 29.1 - § 29.933] - PART 29—TRIBAL TRANSPORTATION SELF-GOVERNANCE PROGRAM

• Part 30 [§ 30.1 - § 30.19] - PART 30—DENIAL OF PUBLIC WORKS CONTRACTS TO SUPPLIERS OF GOODS AND SERVICES OF COUNTRIES THAT DENY PROCUREMENT MARKET ACCESS TO U.S. CONTRACTORS

• Part 31 [§ 31.1 - § 31.47] - PART 31—PROGRAM FRAUD CIVIL REMEDIES

• Part 32 [§ 32.100 - § 32.670] - PART 32—GOVERNMENTWIDE REQUIREMENTS FOR DRUG-FREE WORKPLACE (FINANCIAL ASSISTANCE)

• Part 33 [§ 33.1 - § 33.93] - PART 33—TRANSPORTATION PRIORITIES AND ALLOCATION SYSTEM

• Part 37 [§ 37.1 - § 37.215] - PART 37—TRANSPORTATION SERVICES FOR INDIVIDUALS WITH DISABILITIES (ADA)

• Part 38 [§ 38.1 - § 38.179] - PART 38—AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY SPECIFICATIONS FOR TRANSPORTATION VEHICLES

• Part 39 [§ 39.1 - § 39.109] - PART 39—TRANSPORTATION FOR INDIVIDUALS WITH DISABILITIES: PASSENGER VESSELS

• Part 40 [§ 40.1 - § 40.413] - PART 40—PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS

• Part 41 [§ 41.100 - § 41.125] - PART 41—SEISMIC SAFETY

• Part 71 [§ 71.1 - § 71.14] - PART 71—STANDARD TIME ZONE BOUNDARIES

• Part 79 [§ 79.1 - § 79.9] - PART 79—MEDALS OF HONOR

• Part 80 [§ 80.1 - § 80.21] - PART 80—CREDIT ASSISTANCE FOR SURFACE TRANSPORTATION PROJECTS

• Part 89 [§ 89.1 - § 89.47] - PART 89—IMPLEMENTATION OF THE FEDERAL CLAIMS COLLECTION ACT

• Part 91 [§ 91.1 - § 91.13] - PART 91—INTERNATIONAL AIR TRANSPORTATION FAIR COMPETITIVE PRACTICES

• Part 92 [§ 92.1 - § 92.45] - PART 92—RECOVERING DEBTS TO THE UNITED STATES BY SALARY OFFSET

• Part 93 - PART 93 [RESERVED]

• Part 95 - PART 95 [RESERVED]

• Part 98 [§ 98.1 - § 98.13] - PART 98—ENFORCEMENT OF RESTRICTIONS ON POST-EMPLOYMENT ACTIVITIES

• Part 99 [§ 99.735-1 - § 99.735-81] - PART 99—EMPLOYEE RESPONSIBILITIES AND CONDUCT