What is "caltrain"

CalTrain was a short-lived commuter rail system in the Los Angeles area which operated between 1982–1983. It connected downtown Los Angeles's Union Station with Oxnard in Ventura County. It was the first local rail service in Los Angeles since 1961 and was a forerunner of the modern Metrolink Ventura County Line. Service ended in the face of high costs, lower-than-expected ridership, a changing political climate and staunch opposition from the Southern Pacific Railroad.