Which company operates the railway line that bounds Peterhead, South Australia on the west side?
Outer Harbor railway line The Outer Harbor railway line is a suburban branch line in Adelaide, South Australia. It runs from Adelaide station through the north western suburbs to Port Adelaide and Outer Harbor. It is 21.9 kilometres in length, and shares part of its run with the Grange line. It is operated by Adelaide Metro.
Cranbourne railway line The Cranbourne railway line is a suburban electric railway service operated by Metro Trains Melbourne in the south-eastern suburbs of Melbourne, Australia. It operates along the inner section of the former South Gippsland line.