Complex sentence: It was to link the main north-south Gawler and Noarlunga lines with a new arrangement of through-stations; this would have eliminated the limitations in service-frequency inherent in any railway with a central terminus.
Split into simpler sentences: It was to link the main north-south Gawler and Noarlunga lines with a new arrangement of through-stations. This would have eliminated the limitations in service-frequency in railways with a central terminus.