With the exception of the Marrickville to Port Botany and Lilyfield to Central sections, the network was electrified in stages. The Dulwich Hill to Rozelle section was electrified in October 1967 while the Marrickville to Tempe section was completed in 1985. But with electric haulage of freight trains ceasing in the late 1990s this infrastructure is no longer used and has been removed in parts. As of December 2018, the only remaining sections of overhead wires are a short section from the tunnel under the Bankstown line to Tempe, along the Down line from Dulwich Hill to Campsie and both tracks from Campsie to where the line separates from the Bankstown line.