A Union Pacific stack train is leaving Rodeo Canyon on the Tehachapi Pass line on a fine fall evening. In front C45AH #2620 leads the train, assisted by SD70M #4203 and #3867 and AC45CCTE #7861.
Tier IV locomotives are the safest, cleanest, and most fuel efficient locomotives on the rails today. Unfortunately, most of them are ugly and are as quiet as an ACS-64.