The line forms a cross country connection with the Main North line and the Gwabegar line and ultimately on to the Main West line creating a circuitous bypass of Sydney for freight traffic heading between the west and north of New South Wales.
The line forms a cross country connection from the Main North line in the Upper Hunter region to the Gwabegar line in the Central West region. From the Gwabegar line trains can then ultimately reach the Main West line creating a circuitous bypass of Sydney for freight traffic heading between the west and north of New South Wales.