Doors will open on the new L4 Westmead and Carlingford Line from Friday morning, with the service to take passengers through the heart of Parramatta’s CBD. Doors will open on the new L4 Westmead and Carlingford Line from Friday morning, with the service to take passengers through the heart of Parramatta’s CBD. Transport, Public Transport, Rail Transport Industry, Local Government, State and Territory Government Latest business news