The SD70 series of diesel locomotives, launched by the General Motors Electromotive Division in 1992, have become a familiar sight across the length and breadth of the United States, with over 4,000 of the different variants having been produced to date. This add-on includes 3 main variants: the SD70MAC, with AC traction motors, the SD70ACe also with traction motors but developed to comply with new emissions regulations, and the SD70M-2 which is based on the SD70ACe but which has DC traction motors. This add-on depicts the various external detail differences between the models, and depicts them in realistic prototypical BNSF, Norfolk Southern and Canadian National color schemes. This add-on is a great companion for the SD70ACe add-on, also available on Steam, allowing you to add realism to your RailWorks 2 yards and consists with different SD70 versions working together.