An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Verified Technologies for SmartWay and Clean Diesel

Evaluation for SmartWay Verification of Aerodynamic Devices

Follow these steps for the evaluation part of the verification process:

""Data analysis and interpretation.

EPA will review the submitted data, test reports, and other related materials to determine whether the device performance is suitable for verification.

""NOTE: This step is most critical and may take a few weeks to complete.

Number 2Notice of Verification.

If all data and supporting documentation are acceptable, SmartWay will issue an official Verification Letter. This letter is legally binding and serves as the main indicator of a technology’s verified status.

Number 3Device added to the Verified Devices List.

Once the device is verified, EPA will inform the California Air Resources Board (CARB) and add it to the Verified Devices List.
•  SmartWay Verified List for Aerodynamic Devices

""Changes in SmartWay Verified Devices.

Verified devices must be produced and installed as described to EPA.

Any changes to the device:
""•  Must be documented and reported to EPA by emailing; and
•  May require additional testing or a separate verification.

Important Note

EPA SmartWay reserves the right to contact verified manufacturers at any time regarding their verified product(s). If contact cannot be made after four successive attempts over a three month period, the verified device will be archived until the manufacturer contacts EPA.

Number five


After your device is placed on the verified list, please keep your information up-to-date by emailing

""Required updates include, but are not limited to:
•  Primary contact’s phone number, email, and address;
•  Device’s commercial availability; and

•  Any additional testing.