Two trains per hour between Glasgow Central and Kirkhill and one train per hour in each direction on the Cathcart Circle (Inner and Outer).
From November 1979
Following the opening of the Argyle Line on 5 November 1979, two trains per hour between Glasgow Central and Kirkhill and two trains per hour in each direction on the Cathcart Circle (Inner and Outer).
From 2006
One train per hour between Glasgow Central and Kirkhill/Newton and one train per hour in each direction on the Cathcart Circle (Inner and Outer).[3] On Sundays the Cathcart Circle trains do not operate, so only an hourly service is provided in each direction.
Jowett, Alan (March 1989). Jowett's Railway Atlas of Great Britain and Ireland: From Pre-Grouping to the Present Day (1st ed.). Sparkford: Patrick Stephens Ltd. ISBN978-1-85260-086-0. OCLC22311137.
Jowett, Alan (2000). Jowett's Nationalised Railway Atlas (1st ed.). Penryn, Cornwall: Atlantic Transport Publishers. ISBN978-0-906899-99-1. OCLC228266687.