An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Verified Technologies for SmartWay and Clean Diesel

Requirements for SmartWay Verification of Idling Reduction Technologies (IRTs) for Locomotives

Before applying for SmartWay verification, consider the following:

Requirements for device eligibility

The device must be:
  • Designed for a Switcher or Line Haul Locomotive;
  • Able to provide idle reduction service in lieu of running the locomotive engine(s); and
  • Currently commercially available.

Testing requirements

Manufacturers must communicate with EPA before conducting testing for verification purposes.

Requirements for the applicant

The applicant must be able to ensure that:
  • All information submitted for application is correct;
  • Technology will be manufactured and installed as described;
  • Technology will perform as described.

Requirements for health effects and safety of technology

Concerns with health effects or safety may need to be addressed prior to EPA review of a technology for verification.

Regulatory Requirements

All applicable regulatory requirements remain in effect regardless of verification status.

Top of Page