A heritage unit or commemorative locomotive is a railroad locomotive painted in an honorary paint scheme; usually the paint scheme is that of a now-defunct railroad that merged with or was acquired by the locomotive's owner.
Norfolk Southern 1074 is an EMD SD70ACe owned by the Norfolk Southern Railway, painted in the Lackawanna scheme, one of the 20 railroads acquired by The Norfolk & Western & Southern Railway
Amtrak has sixteen heritage units, each painted in one of Amtrak's former paint schemes or a special veterans scheme. Six are celebratory 50th Anniversary units. Sixteen heritage units are purely used on the Empire Service in New York. Seen here is GE P42DC locomotive #145, which is painted in Amtrak's Phase III scheme.
UP 1995 is an EMD SD70ACe owned by the Union Pacific Railroad painted in the Chicago and North Western Railway scheme, one of the 6 railroads acquired by UP
ES 499.0001, actual running number 350 001-4, of the Slovakian Railways (ZSSK) in its factory paint scheme. Railway companies in Europe have also taken up this practice.
The GE Genesis is a series of passenger diesel locomotives built by GE Transportation for Amtrak, Metro-North, and Via Rail between 1992 and 2001. A total of 321 units were produced.
GE P42DC #174 on the Winter Park Express in 2024
New Jersey Transit #4800 on the Raritan Valley Line in 2008
Via Rail P42DC #902
Metro-North P32AC-DM #207 in 2007