The NSW government has put the finishing touches on an agreement to buy 23 new metro trains for the expansion of the Sydney network from Chatswood to Bankstown in the city's southwest via the CBD.
Transport Minister Andrew Constance on Friday said the government had approved a previously-negotiated contract extension for the operation of an expanded Sydney Metro network from 2024.
Under the contract extension, the Northwest Rapid Transit public-private partnership will operate and maintain 31 metro stations between Bankstown and northwest Sydney's Rouse Hill until at least 2034.
NRT will order 23 metro trains for the new line's expansion from Chatswood to Bankstown. The entire Sydney Metro by that time will span 66km.
The new trains would cost $1.7 billion, Mr Constance said. An additional $2 billion would go towards operations and maintenance of the network.
The NRT partnership won the contract to run the northwest metro line between Rouse Hill and Chatswood in 2014, with the line opening in May 2019.