HardTop Incident in Poland Raises Questions Over Intermodal Rail Safety

A detached container cover, damaged railway infrastructure, and a PKP Intercity train travelling at more than 150 km/h. A serious rail incident in Poland involving an InnoFreight HardTop system is now drawing attention from both the Polish rail authority UTK and the European Union Agency for Railways (ERA), after a freight train component ended up directly in the path of passenger traffic.

HardTop Cover Detached During Freight Operation

The incident took place on 5 April 2025 on the Susz–Prabuty section of the Polish railway network. According to documentation reviewed by RAILTARGET, the event involved a freight train operated by Rail STM carrying 13-foot MonTainer XXM containers equipped with gravity-based HardTop covers manufactured by InnoFreight.

During the journey, the upper HardTop cover of the first container positioned directly behind the locomotive detached and fell into the adjacent track area. Preliminary findings indicate that the incident occurred during strong lateral wind conditions, with gusts reportedly reaching up to 80 km/h. Before falling near the neighbouring track, the detached structure also damaged parts of the overhead contact line infrastructure.

Only minutes later, a PKP Intercity passenger train travelling at approximately 160 km/h reportedly passed the location without the obstacle being detected by the driver. Shortly afterwards, another PKP Intercity service struck the HardTop cover at a speed of around 151 km/h despite emergency braking. According to the published findings, the collision caused temporary lifting of the locomotive, severe damage to the pantograph and overhead contact line, as well as further infrastructure damage along the route.

The Polish Office of Rail Transport (UTK) described the incident as a low-frequency but potentially high-severity event. "The incident demonstrated that, under certain operational and weather conditions, detachment of a HardTop cover may create a serious risk for railway traffic, especially for passenger trains at high speed and railway infrastructure," UTK told RAILTARGET.

The investigation identified several contributing factors, including strong side winds, aerodynamic forces between the locomotive and the first wagon, and insufficient securing of the HardTop loading flap following unloading operations. According to UTK, investigators also identified issues related to operational responsibility for checking the condition of the cover before departure.

One of the more sensitive aspects of the investigation concerns the technical and regulatory assessment of the HardTop system itself. According to UTK, investigators identified several issues related to the operational status of the system and the conditions under which the affected transport unit had been introduced into railway operation.

ERA Declines to Launch JNS Procedure

Following the incident, UTK issued a Safety Alert and recommended suspending the operation of gravity-based HardTop containers in Poland until an appropriate mechanical securing solution is implemented and tested. According to the authority, preventive recommendations have already been introduced and implemented at national level. UTK also confirmed that the investigation activities in Poland have now been completed, with the focus shifting toward ensuring that the recommended technical and operational measures are properly applied before the affected container systems return to service.

RAILTARGET also contacted the European Union Agency for Railways (ERA), which confirmed that the case was reviewed within the Joint Network Secretariat framework. However, the JNS Panel ultimately decided not to launch either an Urgent or Normal JNS procedure.

"The JNS Panel concluded not to launch a JNS procedure since it estimates that correct implementation of existing EU law would have been effective in preventing the accident," ERA stated for RAILTARGET.

According to ERA, responsibility for further supervision measures remains with national safety authorities. UTK added that, while no additional general measures are currently planned beyond the published Safety Alert, supervisory activities remain within the authority’s competence.

The incident has nevertheless reopened discussion around removable cover systems used in intermodal freight transport, particularly regarding securing mechanisms and operational responsibilities during train preparation and inspection procedures. Questions also remain over the certification status and practical operation of the HardTop system itself. RAILTARGET has approached InnoFreight for comment on the findings of the Polish investigation and the measures being considered following the incident. At the time of publication, the company had not yet responded.