Slowly the G&SWR took action, and on 1 January 1866 the line was closed to passengers to enable the regauging and track relaying work. Double track was installed, and a connecting line was laid at Paisley, curving towards Glasgow and joining the Joint Line at Greenlaw. The Hamilton Street (Paisley) terminus was closed to passengers and a new Paisley station named Abercorn was opened on the connecting curve, on Renfrew Road. Locomotive traction was resumed, and a 2-2-2WT locomotive no 159 was ordered from Neilson and Company to work the line. This was the first tank locomotive to be ordered by the G&SWR.