Metrolink's New F125 conducts grade crossing signal testing on the Pasadena Sub. (Photo taken by railroad employee during a public event, no trespassing involved)
Taking a look at the same train and scene as captured by different photographers. The best way to view will be to sort by photo date so the photos are grouped together.
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.