It opened in stages from 1888, being extended to Neilston and Newton, giving the Caledonian Railway a fully independent route by 1904. At the Ayrshire end the line duplicated the existing Glasgow and South Western Railway route at a time when bulk coal exports could be handled more economically in Clydebank, so that the primary purpose of the line was short-lived. The Caledonian Railway hoped to develop suburban traffic in south Glasgow where the new line passed through those districts, but street tramcars limited the success of this.