49 CFR § 535.2 - Purpose.

---
identifier: "/us/cfr/t49/s535.2"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 535.2 - Purpose."
title_number: 49
title_name: "Transportation"
section_number: "535.2"
section_name: "Purpose."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "535"
part_name: "MEDIUM- AND HEAVY-DUTY VEHICLE FUEL EFFICIENCY PROGRAM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 32902 delegation of authority at 49 CFR 1.95."
regulatory_source: "81 FR 74238, Oct. 25, 2016, unless otherwise noted."
cfr_part: "535"
---


# 535.2 Purpose.

The purpose of this part is to reduce the fuel consumption of new heavy-duty vehicles and engines by establishing maximum levels for fuel consumption standards while providing a flexible credit program to assist manufacturers in complying with standards.