The line then heads north as a double track electrified line, passing the Blacktown Control Box and Blacktown train sidings to Marayong station, which has an island platform.

The line continues north-west through Schofields (island platform) where the double track currently ends.

Continuing to the north-west, the line next reaches Riverstone where a passing loop and two side platforms are provided.

[2][3] Electrification from Riverstone to Richmond commenced in 1987 but was suspended in 1988 due to lack of funds, restarting in 1990 and opening in August 1991.

These provide extra capacity to support increased patronage, as the line passes through the middle of Sydney's "North-West Growth Centre".

Duplication of the Quakers Hill to Schofields section commenced in 2009 and was completed in October 2011.