23 CFR § 657.1 - Purpose.

---
identifier: "/us/cfr/t23/s657.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "23 CFR § 657.1 - Purpose."
title_number: 23
title_name: "Highways"
section_number: "657.1"
section_name: "Purpose."
chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "ENGINEERING AND TRAFFIC OPERATIONS"
part_number: "657"
part_name: "CERTIFICATION OF SIZE AND WEIGHT ENFORCEMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "23 U.S.C. 127, 141 and 315; 49 U.S.C. 31111, 31113 and 31114; sec. 1023, Pub. L. 102-240, 105 Stat. 1914; and 49 CFR 1.48(b)(19), (b)(23), (c)(1) and (c)(19)."
regulatory_source: "45 FR 52368, Aug. 7, 1980; 62 FR 62261, Nov. 21, 1997, unless otherwise noted."
cfr_part: "657"
---


# 657.1 Purpose.

To prescribe requirements for administering a program of vehicle size and weight enforcement on the Interstate System, and those routes which, prior to October 1, 1991, were designated as part of the Federal-aid primary, Federal-aid secondary, or Federal-aid urban systems, including the required annual certification by the State.

[72 FR 7747, Feb. 20, 2007]