[2] Beyond Belgrave, the narrow-gauge line has been restored as the Puffing Billy Railway, which runs tourist services to the original terminus of Gembrook.

[3] Trains on the Belgrave line run in a two three-car formations of X'Trapolis 100 trainsets.

The line was built to connect Melbourne and Ringwood with the rural towns of Bayswater, Boronia, Upper Ferntree Gully, and Belgrave, among others.

Since the 2010s, due to the heavily utilised infrastructure of the Belgrave line, significant improvements and upgrades have been made.

In 1921, the narrow-gauge section from Upper Ferntree Gully to Belgrave was converted to automatic signalling, the first such instance on single track in the Southern Hemisphere.

[8] The closing of the narrow-gauge line to Gembrook enabled the first stage of its planned rebuilding to Emerald as part of the suburban electrified system to proceed.

[9] The Comeng trains were introduced to the Melbourne railway system in 1981, alongside the opening of the City Loop.

[11] This brought the cost of train fares down, improving system accessibility for the public.

In April 2016, plans to potentially run a regular revenue Tait set service on the Belgrave line was announced.

This came following La Trobe MP Jason Wood's push for the idea as part of the greater "Puffing Billy master plan".

In November 2016, $1 million was committed to restoring a Tait set currently stored at the Newport Workshops.

[5] These two removals also included a rebuilt Bayswater station and upgraded stabling facilities.

[14] Both of these removals also involved lowering the rail line under the road, with a rebuilt Heatherdale station built as part of the project.

"[16] The final crossing to be removed on the corridor was at Bedford Road in Ringwood by also lowering the rail line, completed in March 2024.

[3] During certain periods of the day, services operate as a shuttle to Ringwood due to lower demand.

[19] Train services on the Belgrave line are also subjected to maintenance and renewal works, usually on selected Fridays and Saturdays.