The Evolution Series is a line of diesel locomotives built by GE Transportation Systems, initially designed to meet the U.S. EPA's Tier 2 locomotive emissions standards that took effect in 2005. The first pre-production units were built in 2003. Evolution Series locomotives are equipped with either AC or DC traction motors, depending on the customer's preference. All are powered by the GE GEVO engine.

The ES44AC (Evolution Series, 4,400 hp, AC traction) replaced the AC4400CW model in the General Electric catalogue. These locomotives have been ordered by every Class I railroad in North America.

This dlc features the ES44AH (Heavy) in five CSX Heritage liveries.

Features:

- animated drivers cabin

- animated wipers

- ACS coupling supported

- running numbers

- animated fans

- custom head and ditchlight

- weathering skins

- dynamic weathering

- alerter (dead man) function
- dynamic radio chatter
- advanced cabin sounds

Liveries:

CSX 1972 Family Line
CSX 1834 Georgia Railroad
CSX 1967 Seaboard Coast Line
CSX 1973 Chessie System 
CSX 1976 Conrail