Construction of a new train line linking Parramatta to Kogarah is among secret plans being worked on by senior transport officials to expand Sydney’s passenger rail network over the next two decades.

The leaked plans also envisage extending the Metro West line eastwards from the CBD to Randwick via Zetland, as well as continuing the heavy rail line used by double-deck trains from Leppington to the new city of Bradfield near Sydney’s new international airport .

The designs for new lines and extensions of others are outlined in Transport for NSW’s confidential medium-term rail plan.

While the plans have yet to be finalised and submitted to the Minns government, they provide an insight into senior transport bureaucrats’ thinking about future expansions of the rail system.

The potentia

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