KiwiRail is partially closing Auckland's Western Line for urgent maintenance work.
Auckland Transport said the Western Line would close between Avondale and Swanson on Sunday 16 October due to subsidence and slip issues.
There would be late evening closures the following week.
KiwiRail staff working on a routine inspection of the Western Line on Monday first discovered the subsidence issue when they found movement in an overhead electric pole.
Trains will be replaced by buses during this time. Details on closures can be found on the Auckland Transport site.