Infrastructure
The line is double track from the junction at Camberwell station to just north of Ashburton station; changing to a single track for the rest of the distance, a short enough section that it is not a serious bottleneck. The maximum permissible train speed limits range from 65 km/h (40 mph) on most of the double track sections, to 40 km/h (25 mph) on the single track, and 30 km/h (19 mph) over the tram/train level crossing on the line.
There is a crossover point at Riversdale station, which allows trains to turn back when they cannot proceed. There are no stabling facilities on the line, although there is a single, rarely-used siding at Ashburton station. The city-bound track between Camberwell and Riversdale stations is signalled for two-way running. This is used by shuttle services when running at frequencies greater than 15 minutes.
Read more about this topic: Alamein Railway Line