This, together with the central Queensland mining railway, constitutes Australia's only significant rural rail electrification.
Third rail electrification was installed in 2004 to allow compatibility with other rapid transit lines, increase reliability, and reduce maintenance costs.
Third rail electrification reached Orpington in 1925, and extended to Sevenoaks ten years later.
This was abandoned in June 1928 when the Southern Railway replaced it with third rail electrification.
Main-line third rail electrification was later expanded to some suburban services.
Various methods of rail electrification are used, as well as much unelectrified track.
This is the northern boundary of third rail electrification.
It also resulted in a decree from the Connecticut supreme court on June 13, 1906 forbidding the use of third rail electrification within the state.
The possibility of using third rail electrification on the bridge was considered but rejected.
We have been examining in detail the case for more rail electrification and plan to make announcements soon.