---
kind: "section"
citation: "23 C.F.R. § 624.3"
title: "23"
number: "624.3"
heading: "Applicability."
url: "https://uscodex.org/cfr/23/624.3"
---

# §624.3. Applicability.

- (a) Except as provided in [paragraphs (b) through (e)](#b..e) of this section, this part is applicable to all segments designated as part of the Dwight D. Eisenhower National System of Interstate and Defense Highways (Interstate System) for which Federal-aid highway funds or other funds administered under [title 23](/cfr/23.md), United States Code, have been used in the past or are used to develop a project.
- (b) This part is not applicable to ramps providing access to safety rest areas, information centers, weigh stations, and truck inspection stations located within the Interstate right-of-way when such areas are accessible to vehicles only to and from the Interstate System. Connections from other public facilities to facilities within the Interstate System right-of way, if an exception is granted in accordance with [§ 624.7(f)](/cfr/23/624.7.md?p=f), are subject to the requirements of this part.
- (c) This part is not applicable to connections between managed lanes and general-purpose lanes on the same Interstate highway.
- (d) This part is not applicable to State maintenance facilities that are located within the Interstate System right-of-way and not open to the public.
- (e) This part is not applicable to access points to non-freeway Interstate System segments located in Alaska or Puerto Rico with average daily traffic volumes less than 400 vehicles per day. In such cases, the provisions of [23 U.S.C. 111](/usc/23/111.md) apply and the FHWA Division Administrator shall determine the level of analysis required to secure FHWA approval of the access modification.

## Notes

### Authority

Authority: 23 U.S.C. 109(a) and (b) and 111; 23 CFR 1.32; 49 CFR 1.85.

### Source

Source: 89 FR 88126, Nov. 7, 2024, unless otherwise noted.