BNSF is one of the largest users of GE's Evolution Series locomotives in the world. BNSF rosters 311 ET44C4s with 4 traction motors and variable traction control. These are Tier 4-Compliant versions of the ES44C4s currently in game on Cajon Pass. As of 2023/2024, BNSF has ordered 50 new ET44ACHs. These have 6 powered axles and are ballasted to 436,320lb. The BNSF Tier 4 pack should include both the ET44C4 and ET44ACH units with a selection of modern rolling stock, including a reefer, steel coil car, cement hopper, bulkhead flat, new articulated well car, new autoracks (maybe an articulated version and/or a Gunderson Multimax), etc.
