On January 20, Metrolink released an image of the first of 20 EMD F125 locomotives that the operator has on order. These Tier 4 (comparable to EU 97/68 Stage IIIB) compliant locomotives have a maximum speed of 200km/h and are powered by a 3.5MW Caterpillar C175-20 engine. Metrolink was the first US operator to order Tier 4 compliant diesels, when it signed the deal in 2013.