Complex sentence: For passenger services, Metrolink uses a fleet of specially designed articulated vehicles composed of Ansaldo Firema T-68As and Bombardier Flexity Swift M5000s which were originally termed LRVs (light rail vehicles), but are now widely known as trams.
Split into simpler sentences: For passenger services, Metrolink uses a fleet of specially designed articulated vehicles composed of Ansaldo Firema T-68As and Bombardier Flexity Swift M5000s. They were originally termed LRVs (light rail vehicles), but are now widely known as trams.