One of EMD's new Tier IV F125 "Spirit" locomotives arrives in San Bernardino with a service that will terminate at Perris.
Metrolink & EMD are having major problems with these new locomotives, with news breaking in late January 2019 that rainwater can leak into the dynamic braking system.
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.