On June 19, 2020, the Pipeline and Hazardous Materials Safety Administration (PHMSA) within DOT, in coordination with the Federal Railroad Administration, finalized an amendment to the Hazardous Materials Regulations allowing for the bulk transport of liquefied natural gas in rail tank cars. The rule was originally proposed in response to a petition by the Association of American Railroads, and may facilitate the transportation of natural gas to markets where pipeline transportation is limited or unavailable.