Key Takeaways
- On 23 January 2025, two KiwiRail crew members narrowly avoided injury when nine improperly secured wagons rolled down a slight gradient at Port Otago’s rail storage facility.
- The Transport Accident Investigation Commission (TAIC) found the incident resulted from incorrect wagon securing, inadequate verification of the task, and insufficient staff understanding of the air‑brake system.
- A poor local safety culture was identified, with rule violations and unreported near‑misses becoming normalised.
- Communication breakdowns—moving to a new task without confirming completion of the previous one—were a critical factor.
- TAIC recommends KiwiRail overhaul safety‑culture practices, improve shunt‑staff training (emphasising the “why” behind procedures), and modify remote‑control equipment so the emergency‑stop button alerts train control even when the locomotive is stationary.
- KiwiRail acknowledges the seriousness of the event, states it has already updated Joint Operating Procedures, and is working on a company‑wide safety‑culture programme with external experts while considering automatic alert enhancements for emergency‑stop usage.
Incident Overview
At approximately 1:25 am on 23 January 2025, two KiwiRail crew members were performing a routine shunting operation at the Port Otago rail storage facility in Port Chalmers. They had parked nine wagons on a slight gradient in the marshalling yard before moving the locomotive to collect the remaining wagons. While coupling the locomotive to the next set of wagons, the nine previously parked wagons began to roll back down the incline toward the workers. The wagons were quiet and slow‑moving, only becoming noticeable when the crew observed the faint shadow they cast on the ground.
Near‑Miss Detection and Avoidance
One crew member spotted the moving shadow, realised the wagons were rolling, and shouted a warning. Both workers managed to step clear just seconds before the wagons struck the locomotive, pushing it backward and uncoupling it from the wagons already attached. Fortunately, no personnel were injured, but the locomotive and the wagons sustained moderate damage. The low speed of the movement belied the significant kinetic energy involved—a 472‑tonne rake traveling at a walking pace can still produce forces capable of causing serious harm or fatality.
Investigation Findings – Technical Causes
The Transport Accident Investigation Commission’s final report identified several technical shortcomings that contributed to the runaway. First, the nine wagons had not been secured correctly according to the required procedures. Second, the crew did not explicitly confirm that the securing task had been completed before moving on to the next activity. Third, training programmes had not provided staff with a sufficient grasp of the air‑brake system, including the timing of brake equalisation and the hazards associated with trapped air within the braking circuit. These gaps meant that even when crews followed the superficial steps, they lacked the deeper understanding needed to recognise when a safety control had failed.
Investigation Findings – Human and Organisational Factors
Beyond the immediate technical failures, TAIC highlighted broader organisational issues. The investigation uncovered signs of a poor safety culture at Port Otago, where deviations from established rules and unsafe practices had become normalised. Near‑misses and minor incidents were not being reported reliably, depriving the organisation of valuable learning opportunities. Communication discipline was also found lacking; the crew transitioned from securing wagons to coupling them without executing a formal “safety reset” to verify that the first task was fully closed out. In high‑hazard environments, such task changes should trigger a deliberate pause to reassess risks and apply appropriate controls before proceeding.
Safety Culture Implications
TAIC chief investigator Louise Cook stressed that the incident exemplifies how quickly routine work can turn dangerous when safety fundamentals erode. She noted that the risk was greatest when workers were positioned close to or between moving vehicles, precisely the scenario that unfolded. The “quiet, slow moving wagons were only detected at the last minute due to the shadow they cast” underscores the importance of maintaining situational awareness and relying on multiple sensory cues—not just visual detection—to recognise hazards.
Recommendations for KiwiRail
In response, TAIC issued three primary recommendations for KiwiRail:
- Address safety‑culture issues at Port Otago by fostering an environment where rule compliance is expected, near‑misses are reported without fear of reprisal, and continuous improvement is driven by data.
- Improve shunt‑staff training so that workers understand the underlying mechanisms of safety rules (e.g., why air‑brake equalisation matters) rather than merely memorising procedural steps.
- Review the design of remote‑control equipment to ensure that activating the emergency‑stop button generates an alert to train control even when the locomotive is already stationary, thereby providing an additional layer of redundancy.
KiwiRail’s Response
KiwiRail chief operations officer Duncan Roy characterised the event as a serious incident despite the absence of injuries, affirming that the company treated it with the gravity it warranted. Roy stated that KiwiRail had already taken significant steps aligned with TAIC’s recommendations:
- The Joint Operating Procedures have been updated to meet required standards and to be clearly understood by all operators.
- The company has accepted the recommendation to immediately improve safety culture at the Port of Otago rail yard.
- A company‑wide safety‑culture programme, developed with guidance from global experts, is underway, aiming to instil a shared responsibility for protecting oneself and others. Early indicators suggest sustained improvements in key safety metrics.
Regarding the emergency‑stop alert recommendation, Roy noted that the proposal is “under consideration.” KiwiRail is exploring options to enhance emergency‑alert notifications so that activation of the stop button on remote‑control packs automatically informs train control, regardless of the locomotive’s motion state.
Commitment to Collaborative Safety
KiwiRail reiterated its commitment to working closely with the Transport Accident Investigation Commission, the Port of Otago authority, and on‑site teams to refine safety practices for the benefit of staff, stakeholders, and the wider public. The organisation views the incident as a catalyst for systemic improvement, emphasizing that learning from near‑misses is essential to preventing future harm. By integrating technical fixes, strengthened training, and a revitalised safety culture, KiwiRail aims to ensure that routine shunting operations remain consistently safe, even when faced with subtle hazards such as a barely perceptible shadow on the rail yard ground.