Investigation of serious railway incident in Grønland Metro Station


On Monday 2 March 2020 at 13:38, a signal error occurred at Grønland Metro station. The signalling system indicated "clear" in a situation where it should have shown "stop".

Track circuits are used to ensure adequate distance between metro trains. In front of each track circuit there is a green light when it is clear, and red when it is not clear. If a signal is dark, the driver should stop in front of the signal.

In addition to the signals on the track, the traffic control system for dispatchers shows the status of a signal and the equipment on board the trains (ATP) monitors the permitted speed and signal. If a driver passes a red signal, or holds too high a speed, ATP should automatically activate the brakes.

In this case the track field at Greenland Metro station was occupied and the corresponding signal was dark. However, the remote control showed "green" and ATP showed "M (50 km/h)" while it should have shown "stop".

The investigation will clarify the sequence of events and identify possible causal factors. Any underlying conditions that may have contributed to the accident will be mapped and analysed.

Signal T155 - Grønland

Photo: Sporveien T-banen AS

Latest update: 18.03.2020

Grønland metro station
Occurrence date
Type of Transportation
Type of occurrence
Wrong side signaling
Rolling Stock
Multippel Unit (MU)
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