eCFR Atlas
API

Federal agency

Department of Transportation

DOT

Total regulationⓘ

51,890

Every rule this agency manages, in words — rules managed jointly with another agency count in full.

Share of all regulationⓘ

51,142

Jointly managed rules are split evenly between their agencies, so shares can be fairly compared across agencies.

Including sub-agencies

5,488,058

Rolled up across 12 sub-agencies.

Areas managed

4

4 measured, 1 shared.

Rules this agency manages

Citation Rule area Level Words Also managed by Official text
2 CFR Chapter XII Chapter XII—Department of Transportation chapter 1,397 — eCFR ↗
5 CFR Chapter L Chapter L—Department of Transportation chapter 719 — eCFR ↗
44 CFR Chapter IV Chapter IV—Department of Commerce and Department of Transportation chapter 1,495 Department of Commerce eCFR ↗
48 CFR Chapter 12 Chapter 12—Department of Transportation chapter 48,279 — eCFR ↗

“Level” is the narrowest level the reference actually names. A reference that names both a chapter and a part is a part-level reference and is counted as one.

Sub-agencies

Amendment activity

Sections amended in parts administered by Department of Transportation 5 amendments, Oct 2023 – Sep 2026
Oct 2023 Sep 2026

8 further amendments in these titles carry no part identifier and cannot be attributed to a specific scope, so they are excluded from the chart rather than assigned to one.

Attribution is exact, not estimated: each scope is expanded to the set of parts inside it in the current structure, and only amendments to those parts are counted. Dated by issue date, not amendment date — the two differ in about half of all rows.