Electrification
In 1960 the remainder of the North Clyde suburban system (Airdrie, Springburn and Bridgeton Central to Milngavie, Balloch Pier and Helensburgh Central, including both routes between Partick and Dalmuir) underwent electrification. A new junction between the former LNER and LMS lines was built at Dunglass, just west of Bowling, allowing North Clyde Line services to use the former LMS (Lanarkshire and Dunbartonshire) line through Dumbarton East, and the original LNER (Caledonian and Dunbartonshire Junction) line from Dunglass to Dumbarton Central was closed. The outer areas were electrified to the 25 kV AC 50 Hz standard, with the central area, the Springburn, Bridgeton and Milngavie branches and the Yoker line being at 6.25 kV AC due to restricted clearances in tunnels. As insulation technology improved these lines were eventually converted to 25 kV.
In October 2010, the line between Bathgate and Airdrie opened complete with electrification at 25 kV for crew training and charter trains. The section between Bathgate and Haymarket (including the section that is common with the Glasgow to Edinburgh via Falkirk Line east of Newbridge Junction) was also electrified at 25 kV. This work was carried out as part of the Airdrie-Bathgate Rail Link.
Read more about this topic: North Clyde Line