According to the radio channel, the Swedish Transport Agency must have issued extensive sanctions against the haulier.
Drivers at the haulier must have used another driver's driver's card to evade the rules regarding driving and rest times.
The traffic manager at the haulage company was declared unfit last year and his successor was also declared unfit this year.
Caused total stop
The accident occurred early on Tuesday morning.
The trailer puller loaded with iron beams overturned and it turned out that the actual driver had handed over the steering wheel to a woman who does not have a driver's license for a truck.
Both were under the influence of drugs.
The woman and the man survived without serious injuries. The traffic had to be redirected at the accident site and only at 11 o'clock on Wednesday could the E4 be opened to traffic again. The couple was arrested by prosecutors on suspicion of a number of crimes, including aggravated drunk driving, aggravated negligence in traffic.