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Title 23

Displaying title 23, up to date as of 6/10/2026. Title 23 was last amended 6/10/2026.
There have been changes in the last two weeks to Chapter I.
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Title 23HighwaysPart / Section
Chapter IFederal Highway Administration, Department of Transportation1 – 999
Subchapter AGeneral Management and Administration1
Part 1General1.1 – 1.36
Subchapter BPayment Procedures140 – 192
Subchapter CCivil Rights200 – 230
Part 200Title VI Program and Related Statutes—Implementation and Review Procedures200.1 – 200.11
Part 230External Programs230.101 – 230.415
Subchapter DNational Highway Institute260
Part 260Education and Training Programs260.101 – 260.407
Subchapter EPlanning and Research420 – 490
Subchapter FTransportation Infrastructure Management500 – 515
Part 500 [Reserved]
Part 505 [Reserved]
Part 511Real-Time System Management Information Program511.301 – 511.315
Part 515Asset Management Plans515.1 – 515.19
Subchapter GEngineering and Traffic Operations620 – 680
Subchapter HRight-of-Way and Environment710 – 778
Subchapter IPublic Transportation810
Part 810Mass Transit and Special Use Highway Projects810.2 – 810.310
Subchapter JHighway Safety924
Part 924Highway Safety Improvement Program924.1 – 924.17
Subchapter KIntelligent Transportation Systems940 – 950
Part 940Intelligent Transportation System Architecture and Standards940.1 – 940.13
Part 950Electronic Toll Collection950.1 – 950.9
Subchapter LFederal Lands Highways970
Parts 970-999 [Reserved]