Complex sentence: The line is a consolidation of the Montclair Branch, which ran from Hoboken Terminal to Bay Street, Montclair and the Boonton Line, which ran from Hoboken to Hackettstown, New Jersey, formed when the Montclair Connection opened on September 30,2002.
Split into simpler sentences: The line is a consolidation of the Montclair Branch, which ran from Hoboken Terminal to Bay Street, Montclair and the Boonton Line, which ran from Hoboken to Hackettstown, New Jersey. The Montclair-Boonton line was formed when the Montclair Connection opened on September 30,2002.