Until 2009, track maintenance was run by the State Rail Administration, but after it merged with the Transport agency, the job was outsourced to different companies, with uneven results.
The co-leader of the Green Party, Gustav Fridolin, told Swedish Radio News the current system means long lines of communication to get things gone, with uncertain results.
But conservative Moderate Infrastructure Minister Catharina Elsäter Swärd has expressed concern about the consequences, saying she prefers to have several companies with major knowledge and involvement doing the job.
New rail chaos fears
Plans to align Sweden's rail network with neighbouring European countries by investing millions of dollars in a new signal system carry with it a warning of fresh chaos for train travellers.