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DOT/NHTSA RIN: 2127-AM28 Publication ID: Fall 2020 
Title: ●Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and Other Technical Amendments 

This rulemaking would propose changes to NHTSA regulatory text to align with changes proposed by EPA in test procedures used for heavy-duty engines and vehicles to demonstrate compliance with fuel consumption and emission standards. EPA published its related proposal Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and Other Technical Amendments on May 12, 2020 (RIN 2060-AU62). The changes improve accuracy and reduce testing burden. The rulemaking would also propose other amendments that would add compliance flexibility, harmonize with other requirements, add clarity, correct various errors, and streamline the regulations. Given the nature of the proposed changes, they would not have significant energy, environmental, nor economic impacts. The proposed changes would be consistent with requirements in the Energy Independence and Security Act of 2007 (EISA), title 1, subtitle A, sections 102 and 108, as they amend 49 USC section 32902, and the Clean Air Act.

Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Deregulatory 
CFR Citation: 49 CFR 523    49 CFR 534    49 CFR 535   
Legal Authority: delegation of authority at 49 CFR 1.95    49 USC 32902(k)(2)   
Legal Deadline:  None
Action Date FR Cite
NPRM  04/00/2021 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
James Tamm
Fuel Economy Division Chief
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 493-0515