 The Renfrew District Railway opened on 1 June 1903.It left the Joint Line's Shieldhall branch, crossing the G&SWR Renfrew branch near Renfrew, then running south alongside it to a terminus at Renfrew (Porterfield).At first the passenger service was operated alternately each half year by the CR and the G&SWR, but from 1907 the G&SWR ran all the passenger trains, using St Enoch station in Glasgow.