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Rules and Regulations

RI Clean Diesel Fund

During the 2016 Legislative session, the General Assembly passed R.I Gen. Laws §31-47.3-5.1, which established the Rhode Island Clean Diesel Fund. The Clean Diesel Fund was created to enable DEM to receive annually appropriated monies ($1.9 million for FY 2017) and provide reimbursement grants to companies for the purpose of reducing emissions from heavy duty diesel vehicles operating on Rhode Island road. DEM will solicit projects that undertake eligible clean diesel measures and award grants from the fund to reimburse applicants for undertaking these measures.

Equipment eligible for grant funding must meet the following requirements:

  • Be intended for on road use;
  • Be registered with the Rhode Island Division of Motor Vehicles;
  • Be kept or garaged in Rhode Island as indicated on the vehicle registration issued by the Division of Motor Vehicles;
  • Fifty percent (50%) or more of the vehicle miles traveled, or hours of operation, shall be projected to be in Rhode Island for at least five (5) years following the reimbursement grant award.

The following types of costs are eligible to receive grant monies from the fund:

  • Vehicle Replacements;
  • Replacement or upgrades of transport refrigeration units (TRUs);
  • Engine repowers;
  • Diesel emissions reduction solutions
  • Clean alternative fuel conversions;
  • Idle reduction technologies;
  • Aerodynamic technologies;
  • Low rolling resistance tires;
  • Routine maintenance shown to improve fuel efficiency or decrease emissions including, but not limited to, oil changes and cleaning of diesel particulate filters.

For more information on the projects please refer to the documents below.

All interested parties must submit an application once the Department issues a Request for Proposals (RFP). Applications will be evaluated based on the project's ability to cost effectively reduce emissions, amount of time traveling/operating in RI, as well as other factors.

The Department will contact successful applicants about their award status once a decision has been made. The applicant is not to make any purchases and start the project until after the Grant Agreement has been signed and a Project Confirmation Letter has been issued. Please be aware that the Department and the State of Rhode Island take no responsibility for project work done outside the term or scope of a valid grant agreement or prior to a full approval of an agreement.

Any questions on the Clean Diesel Fund can be submitted via email to Catherine Menke at with the subject line "Clean Diesel Fund – Question" or learn answers to frequently asked questions


  • March 25, 2017 – Request for Proposals and application is released
  • April 4, 2017 – A workshop will be held on the Clean Diesel Fund
  • May 9, 2017 – Deadline for application submission