23 CFR § 650.501 - Purpose.

---
identifier: "/us/cfr/t23/s650.501"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "23 CFR § 650.501 - Purpose."
title_number: 23
title_name: "Highways"
section_number: "650.501"
section_name: "Purpose."
chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "ENGINEERING AND TRAFFIC OPERATIONS"
part_number: "650"
part_name: "BRIDGES, STRUCTURES, AND HYDRAULICS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "23 U.S.C. 119, 144, and 315."
cfr_part: "650"
---


# 650.501 Purpose.

This subpart sets the national minimum standards for the proper safety inspection and evaluation of all highway tunnels in accordance with 23 U.S.C. 144(h) and the requirements for preparing and maintaining an inventory in accordance with 23 U.S.C. 144(b).