A pattern dressed up as a series of accidents
Wellington’s suburban rail network does not have a bad luck problem. It has a design problem. Every few months, a new disruption makes headlines, officials express concern, and commuters absorb the cost. Then it happens again.
The latest performance data tells the story plainly. In January 2026, 22.3% of Wellington rail services, some 1,916 trips, were replaced by buses. Year-to-date rail patronage was down 5.4% on the prior year, with a $4.24 million fare revenue shortfall. Rail punctuality did improve to 90.1%, up from 84.4%, but only because KiwiRail’s summer maintenance works allowed speed restrictions to be eased. The improvement is real. It is also fragile, built on a burst of catch-up work rather than sustained investment.
For Wellington businesses, every disrupted service translates directly into late arrivals, missed meetings, and eroded confidence in public transport. The city is squeezed between hills and harbour with no redundant corridor. When rail fails, roads absorb the load they were never designed to carry.
The same warnings, ignored repeatedly
In August 2021, a passenger train travelling at approximately 70 km/h derailed on the Kāpiti Line after a landslide covered both tracks. The driver spotted the debris just 40 metres ahead, far too late to stop. All 82 passengers and 3 crew escaped uninjured, but a separate freight derailment the same day disrupted roughly 20,000 commuters.
TAIC’s final report, published in October 2024, more than three years later, found KiwiRail’s rainfall monitoring missed 27.1mm of rain in the three hours before the derailment. The risk matrix did not account for short-duration intense rainfall. Slope stability assessments were insufficient. There was no coordinated emergency plan between KiwiRail and operator Transdev.
In 2024, TAIC chief investigator Naveen Kozhuppakalam was blunt: this was ‘the third TAIC report in just over two years that highlights the need for KiwiRail to improve its preparation and responsiveness to severe rain events.’
KiwiRail’s own ‘critical systems failure’
The most damaging recent episode came in May 2025, when KiwiRail disclosed that Wellington services would run under a 70 km/h speed limit, effectively halving service frequency. The initial explanation was a broken track evaluation car. The deeper problem was worse: the Kāpiti line had not been scheduled for assessment within its compliance window since at least mid-March 2025, regardless of the car’s condition.
KiwiRail’s own statement called it ‘a critical systems failure’. Greater Wellington chairman Daran Ponter in 2025 labelled it ‘a monumental failure’. The track evaluation car at the centre of the saga is 41 years old, and KiwiRail’s solution is to replace it with one new car for the entire country.
A funding model that rewards neglect
The structural problem is not complicated. KiwiRail owns and maintains the track. Greater Wellington’s Metlink runs the services and collects fares. KiwiRail sees almost none of that fare revenue. It depends on freight operations and government capital injections to fund commuter infrastructure maintenance. Every dollar of deferred maintenance is a saving on KiwiRail’s books today and a cost that lands on commuters, employers, and the regional economy tomorrow.
A government-commissioned rapid review in June 2023 flagged this governance gap directly. It found metro passenger rail governance was insufficiently integrated, with a culture of ‘decision-making being pushed up the chain of command’. The same review valued metropolitan rail at 77% of the total value of rail in New Zealand, with time and congestion savings alone worth $939 million to $1,054 million annually. Three years on, the governance problem it identified has not been resolved.
In September 2023, Greater Wellington’s then-Transport Committee chair Thomas Nash called for ‘an injection of cash’ to manage critical failure points, citing ‘fragilities like slope instability and assets at the end of their life’.
Someone is paying, just not KiwiRail
The cost of Wellington’s rail fragility is not hypothetical. It is absorbed daily by employers whose staff arrive late, by workers who switch to cars and add to congestion, and by a city that is steadily losing rail passengers because the service is not reliable enough to trust. Patronage falling 5.4% is not a blip. It is a vote of no confidence from the people the system is supposed to serve.
Until someone restructures the incentives so that the entity maintaining the track actually bears the cost of failure, Wellington will keep getting the rail network it pays for: one that works just well enough to avoid a crisis, and never well enough to be trusted.
Sources
- Metlink January 2026 Monthly Performance Report (2026-02)
- TAIC: Passenger train 6205, train derailment, Kāpiti, 17 August 2021 (2024-10-01)
- NZ Herald: Hutt Valley and Kāpiti trains running again as TAIC opens inquiry (2021-08-17)
- RNZ: Stronger rain monitoring could have prevented train derailment – report (2024-06-06)
- NZ Herald: KiwiRail reveals further problem that led to Wellington’s train fiasco (2025-05-02)
- Ministry of Transport: Rapid Review of KiwiRail Passenger Services (2023-06-26)
- Scoop: Review of KiwiRail Equipment Failure Welcomed by Greater Wellington (2023-09-01)