ProRail finds pipes fixed to tracks as Dutch trains stall on Prinsjesdag

Dutch rail manager ProRail said suspected sabotage stopped or delayed trains across the centre, east and north of the Netherlands on Tuesday morning, 15 September. Staff found pipes fastened to the rails at multiple sites. The objects fooled the occupancy system into treating empty track as occupied, turning signals red and closing level crossings.

The first faults appeared around 5.30 a.m. A ProRail spokeswoman told NOS the count rose quickly from 13 simultaneous signal failures to 24. Joke van der Cruysen, speaking for the manager, said investigators had already been to several of the sites and found materials that had been put there on purpose. She expected more locations to turn up during the day.

How the pipes stopped the timetable

Dutch track circuits treat a conducting object on the rail as a train. Once that signal is set, the section cannot be cleared for another movement. Level crossings default to closed. Drivers must stop or crawl. ProRail called the pattern a section fault in the signalling system. Safe running was impossible until each site was inspected and the objects removed.

Sources named three early clusters to NOS: Utrecht to Arnhem near Veenendaal and Overberg; Amersfoort to Deventer; and Gouda to Oudewater. NS journey planners showed no trains between Amersfoort and Deventer, Zwolle and Zutphen, Zwolle and Leeuwarden, and Utrecht and Arnhem. The map around Zwolle, the main junction for Overijssel and the north, turned red before 7 a.m.

One train struck material on the track. ProRail would not name the place. It said the contact did not produce an accident and that no one was hurt. Workers then walked the lines to lift the pipes and restore the circuits. The company gave no firm time for a full restart. NS said it hoped to run again through Amersfoort, Zwolle and Deventer after midday.

Road traffic and the planner both failed

Closed barriers jammed roads near the affected crossings. Reuters reported that the same objects that froze trains also disrupted road traffic at several level crossings. The NS planner itself failed for part of the morning, so passengers could not check alternatives on the usual app.

Replacement buses appeared at Zwolle and other stations. Overijssel regional outlet RTV Oost said almost no trains ran around Zwolle and Deventer in the first hours. The disruption sat on the spine that links Utrecht with the north and east, so even services that never entered the sabotaged sections ran late as paths were cancelled.

Prinsjesdag and an open investigation

Tuesday is Prinsjesdag, the day the monarch reads the government's budget statement in The Hague. ProRail and the police said they did not know whether the timing was linked to the ceremony. They also said they did not know who placed the pipes. The police opened a criminal inquiry.

DutchNews quoted van der Cruysen as saying the evidence of sabotage was already clear and that the case needed a thorough investigation. NRC reported that by mid-morning the faults covered 24 places and that pipes had been fixed to the rails at part of those sites. De Telegraaf carried the same account from a ProRail spokeswoman: the pipes were put there deliberately.

The method is cheap and hard to spot from a moving cab. A length of pipe does not look like an explosive. It does not have to derail a train to shut a corridor. It only has to close the electrical path that the interlocking uses to prove the line is clear. That is why one train could hit an object while dozens of other trains never left the platform.

What still has to be shown

ProRail has not published a full list of sites. It has not said how the pipes were fixed, what they were made of, or whether the same design appeared at every location. Those details will decide whether investigators treat the case as one coordinated action or as copycat work.

The network east and north of Utrecht is the country's main inland spine. Zwolle connects the Randstad with Groningen, Leeuwarden, Emmen and Enschede. A morning shutdown on that spine on a state occasion is a test of both the signalling design and of how quickly police can turn scattered finds into a single case file.

By late morning the operational question was simple: how many sites still had objects on the rail, and how long would it take to prove each section clear. The political question, which ProRail declined to answer, was whether anyone had chosen Prinsjesdag on purpose.