The Swedish Transport Administration warns of delays in train traffic on the route concerned, but departures have also been canceled. Transdev, which is responsible for Upptåget on the route, replaces the train traffic with a bus on the route Morgongåva - Sala.

- While SJ chooses to run the entire route, but with interruptions at every stop signal where you can wait for the clear sign. That's how they have decided to solve it, says Sara Lindström, communicator at the Swedish Transport Administration.

She announces that staff are on site and working on the error, but that there is currently no forecast for when it can be rectified.

- What exactly the signal error is due to I can not say. But travelers should expect delays equivalent to half an hour, says Sara Lindström.