Sydney's new driverless northwest Metro has been officially opened in "an historic day for NSW".
The first commuters boarded trains at Tallawong Station in Rouse Hill following the official opening by Premier Gladys Berejiklian and Transport Minister Andrew Constance on Sunday morning.
When the line reaches full operation, trains will run every four minutes each way during peak hour between Tallawong and Chatswood.
But they will run once every five minutes for the first six weeks, which Mr Constance previously described as a "ramp up period".
