Title 23 presents regulations by the Federal Highway Administration and the National Highway Traffic Safety Administration detailing planning and research, engineering and traffic operations, right-of-way and environment, public transportation, and highway safety. Additions and revisions to this section of the code are posted annually by April. Publication follows within six months. | Code Of Federal Regulations Title 23 Highways Revised As Of April 1 2020 by Office Of The Federal Register (u. s.), Paperback | Indigo Chapters | Code Of Federal Regulations Title 23 Highways Revised As Of April 1 2020 by Office Of The Federal Register (u.s.), Paperback | Indigo Chapters