From Sunday more trains will run on the Western line with some other timetable changes for other parts of Auckland's rail network.
On the Western line a new weekday timetable will see trains run every 10 minutes Monday to Friday peak between 6 and 9am and 2.30 to 7pm and every 20 minutes Monday to Friday between 9am and 2.30pm.
On weekends and public holidays trains will run every 30 minutes.
Departure times are changing for Pukekohe services with some services departing earlier.
The first Monday to Friday departure from Pukekohe will be at 5.03am.