The Evolution Series is a line of diesel locomotives built by GE Transportation Systems, 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 Evolution Series was named as one of the "10 Locomotives That Changed Railroading" by industry publication Trains Magazine.   It was the only locomotive introduced after 1972 to be included in that list.

Canadian National announced in January 2012 that 35 ES44AC's were on order for 2012-2013 delivery to be used primarily on the grades of its ex-BC Rail main line.

Eventually 65 ES44AC units on order for CN were delivered in 2012-2013; to be numbered 2800-2864.

FEATURES:

- Hi-Ad or Steerable Trucks
- Directional Headlight - Illuminated Ditch Lights
- Smooth, Powerful drive with 5 Pole Motor and Dual Flywheels
- Separate Cut Levers
- Optional Metal Grab Irons
- Blackened Metal Wheels
- Easy to add DCC with Digitrax DZ125IN or Train Control Systems TCS EUN651.