List of low-emissions locomotives in North America

The following is a list of diesel-electric locomotives that meet or exceed EPA Tier 2 locomotive emissions regulations, sorted by builder. This is a non-exhaustive list of locomotives in North America. Furthermore, green/clean energy is an always developing sector and that more locomotives may be added to the list, while some will no longer meet current standards.

Brandt Road-Rail
Brandt Road-Rail is a company that mainly produces road–rail vehicles, especially railcar movers and maintenance of way equipment.

In addition, in 2006, it also built a single prototype genset locomotive.

Motive Power and Equipment Solutions
Motive Power and Equipment Solutions was a locomotive manufacturer and rebuilder active in Greenville, South Carolina from 1999 until 2022. This company is not to be confused with MotivePower.

Vehicle Projects
In 2009, a company called Vehicle Projects, in cooperation with BNSF Railway, rebuilt one Railpower GG20B locomotive into a prototype hydrogen-powered locomotive, called an HH20B.