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SmartWay Technology Program


Verified Aerodynamic Technologies

Aerodynamic technologies minimize drag and improve air flow over the entire tractor-trailer vehicle. Aerodynamic technologies include gap fairings that reduce turbulence between the tractor and trailer, side skirts that minimize wind under the trailer, and rear fairings that reduce turbulence and pressure drop at the rear of the trailer. Using fairings in combination with one another (or, in a few cases, when used alone) have the potential to provide an estimated 5 percent or greater reduction in fuel use relative to the truck's baseline, when used in conjunction with an aerodynamic tractor on long haul Class 8 trucks, in highway type operation. This reduces NOx emissions, saves up to 800 gallons of fuel, and eliminates over nine metric tons of greenhouse gas emissions per year.

EPA has verified the following categories of aerodynamic technologies:

  • Trailer Gap Reducer and Trailer side skirts (used in combination with one another); Trailer Boat Tail and Trailer Side Skirts (used in combination with one another);
  • Advanced Trailer End Fairing; and,
  • Advanced Trailer Skirts.

To be eligible for DERA funding, aerodynamic technologies must be on EPA's SmartWay verified technology list

Click the links below to view the trailer aerodynamic technologies that are SmartWay verified:

    Trailer Gap Reducers

    Trailer gap reducer (should be used with side skirts) - estimated fuel savings: 1 percent or greater.

    • Carrier Transicold Gap Fairing
    • FreightWing gap reducer
    • Laydon Composites gap reducer
    • Nosecone "Nose 3-D" Gap reducer (consists of top and side units sold as one piece of equipment)
    Trailer Boat Tails

    Trailer Boat Tail (this or the gap reducer should be used with side skirts) — estimated fuel savings: 1 percent or greater.

    • Aerodynamic Trailer Systems (ATS) dual lobe boat tail
    • AeroVolution inflatable boat tail
    • ATS SmartTail
    • Kodiak Innovations – Bumper Bullet
    • Transtex rear trailer fairing
    Trailer Side Skirts

    Trailer Side Skirts (should be used with gap reducer or boat tail) — estimated fuel savings: 4 percent or greater.

    • Carrier Transicold Belly Fairing
    • Fleet Engineers Extended Air Slipper
    • FreightWing belly fairing trailer skirts
    • Kodiak Innovations – AirPlow
    • Laydon Composites trailer skirts — 6 or 7 panel
    • Ridge Corp. - GreenWing RAC0002
    • Silver Eagle Mid-length Skirt
    • Silver Eagle Mini-skirt
    • Transtex trailer skirts
    • Utility Trailer -- Utility Side Skirt 120
    Advanced Trailer End Fairing

    Advanced Trailer End Fairing (this can be used with or without other fairings) — estimated fuel savings : 5 percent.

    • ATDynamics TrailerTail rear trailer fairing
    • ATS Integrated Automated System (WindTamer with SmartTail)
    • SmartTruck UT-1
    • SmartTruck UT-6
    Advanced Trailer Skirt

    Advanced Trailer Skirt(this can be used with or without other fairings) — estimated fuel savings: 5 percent.

    • Aerofficient -- Aero-slide side fairing system (with rearmost telescoping panel) (model  ASFS)
    • Aerofficient -- Fixed side fairing (with landing gear wrap panel) (model  FFGW)
    • Aerofficient -- Fixed side fairing (with landing gear toe in panel) (model  FFTI)
    • Airflow Deflector -- Deflector
    • ATDynamics-Transtex Trailer Side Skirts
    • Atlantic Great Dane -- AeroGuard side skirt (AGD400-43)
    • Carrier Transicold Aeroflex Fairing
    • FreightWing Aeroflex trailer skirt
    • Kodiak Innovations – AeroCurtain
    • Laydon Composites trailer skirt — 8 panel
    • Laydon Composite Classic 7-Panel Trailerskirt, Product code TRSK700SA
    • Laydon Composite Hybrid 24 ft. Trailerskirt, Product code TRSK710SA
    • Ridge Corp. - GreenWing RAC0003
    • Ridge Corp. - GreenWing RAC0012
    • Silver Eagle Aero Saber
    • Strehl Model 715
    • Sweet Bottom Trailer Skirt
    • Transtex MFS Trailer Side Skirts
    • Utility Trailer -- Utility Side Skirt 120A
    • Utility Trailer -- Utility Side Skirt 160
    • Wabash National Advanced Trailer Side Skirt, DuraPlate AeroSkirt - Standard
    • Wabash National Advanced Trailer Side Skirt, DuraPlate AeroSkirt - Angled
    • Windyne Flex-Fairing

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