Passenger services were withdrawn over the line (from Dumbarton East to Possil and Stobcross) in October 1964, at the same time as the Glasgow Central Railway (which it connected to at its southern end). Complete closure as a through route came at the same time, though sections remained in freight use until the late 1970s and the last few sidings at Dalmuir (Riverside) & Old Kilpatrick survived until August 1987.
Today many stretches have been filled in or redeveloped but some disused platforms survive, along with the station buildings at Clydebank Riverside (now a private house) & Kelvinside (restored & converted to a restaurant).
Butt, R. V. J. (1995). The Directory of Railway Stations: details every public and private passenger station, halt, platform and stopping place, past and present (1st ed.). Sparkford: Patrick Stephens Ltd. ISBN1-8526-0508-1. OCLC60251199.