KiwiRail says it is committed to maintaining the line between Masterton and Pahiatua, despite canning its only regular freight service from Wellington to Palmerston North.
The weekly freight service, which was KiwiRail's last regular service beyond Masterton on the Wairarapa line, stopped running in February following a service review.
A spokeswoman from Kiwirail said while trains will now run only as required between Masterton and Pahiatua, KiwiRail would continue to maintain the line.
The line would still be inspected to ensure freight and heritage services could safely operate on the line, she said.
Inspections would occur at least once every month and would include inspecting the quality of the rail and sleepers, and clearing any vegetation as required.