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 is a company that mainly produces roadâÂÂrail vehicles, especially railcar movers and maintenance of way equipment.
In addition, in 2006, it also built a single prototype genset locomotive.
Integral dx, Inc. is a company in Montevideo, Minnesota that builds a variety of industrial equipment, including spray pavers, concrete mixers, and railroad vehicles. Since 2023, it has been manufacturing Tier 4-compliant switchers for the US Armed Forces. These switchers are usually powered with Caterpillar engines, though Cummins-equipped variants are also offered.
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.
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.