[2] In 1995, the track used by Adelaide-bound services was converted to standard gauge as part of the Adelaide to Melbourne standardisation project.

At the same time, the stations at Millswood, Hawthorn and Clapham were closed to speed up services.

[3] In 2008, the Government of South Australia announced a plan to rebuild the Belair line.

Dual-gauge sleepers were laid to allow for the line to be converted to standard gauge in future – this is not planned in the immediate future due to extra engineering work and complications[vague] with the standard gauge line.

[6][7] In 2021 the new operator of the line, Keolis Downer, enforced a limit on the number of bicycles carried in railcars, which affected patronage of the Mitcham Hills mountain bike circuit.

Until June 2007, some services on weekends were operated by a 2000 class railcar modified to incorporate increased bike capacity.