Upgrade or replace locomotives with funding from the Carl Moyer Program. This program aims to cut air pollution from heavy-duty diesel engines in California.


The Carl Moyer Program closed on Wednesday, May 18, 2022, and is not accepting new applications. Complete applications that were submitted prior to midnight (Pacific Daylight Time) on May 18 will be evaluated for eligibility.

Year 23 Funding Cycle is anticipated to begin accepting new applications when the program opens in Summer 2022. Please sign up for the Carl Moyer Notification List on the Carl Moyer Program web page to receive timely email alerts or check back on this web page for program updates. 


Project Types

The Air District is currently accepting applications for Locomotive projects until May 18, 2022. Funding is offered on a first-come, first-served basis. Applications must be complete to be considered for funding.

Funds are available for the following project types:

  • Locomotive replacement - replace an old locomotive with a Tier 4 emissions standard engine.
  • Engine replacement (repower) - replace an old engine with a new, Tier 4 emission-certified engine.
  • Head end power unit replacement - replace the locomotive head end power unit with a Tier 4 emissions standard engine.


Locomotive projects by railroad class (type) are eligible for funding up to the following limits:

How to Apply

  1. Determine your locomotive’s eligibility for this program.
  2. Gather the required information about your current locomotive and replacement locomotive or engine.
  3. Apply for funding online.

Workshops and Events

View the Calendar for upcoming workshops, events, and deadlines.

Additional Information

Learn more about locomotive funding, including project type details, regulatory information, and application requirements.

Contact Us

Yu Zhang Liu
Senior Staff Specialist, Strategic Incentives


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Spare the Air Status

Last Updated: 4/27/2022