Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and other Amendments – Proposed Rule
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Rule Summary
EPA is proposing changes to the test procedures for heavy-duty engines and vehicles to improve accuracy and reduce testing burden. This proposed rulemaking would modify existing test procedures for heavy-duty engines and vehicles. These test procedure changes would improve accuracy, and in some cases, reduce test burden.
EPA is also proposing other regulatory amendments concerning light-duty vehicles, heavy-duty vehicles, highway motorcycles, locomotives, marine engines, other nonroad engines and vehicles, stationary engines, and portable fuel containers.
These amendments would:
- Streamline the regulations which will reduce industry costs
- Increase compliance flexibility
- Harmonize with other requirements
- Clarify existing requirements
- Correct errors
Additional Resources
- Notice of Proposed Rulemaking (PDF) (222 pp, 4.5 MB, published May 12, 2020, About PDF)
- Fact sheet: Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and other Technical Amendments (PDF) (2 pp, 61 K, EPA-420-F-20-005, March 2020, About PDF)
- EPA memo highlighting regulatory changes in the proposed rule
- Final Rule for Improvements for Heavy-Duty Engine and Vehicle Test Procedures, and other Amendments
- Supplemental Notice of Proposed Rulemaking for Improvements for Heavy-Duty Engine and Vehicle Test Procedures