On Monday, June 24, the bus strike will be expanded to Jönköping, Gävle, Östersund, Norrköping, Strängnäs, Halmstad and Västerås.
If there is still no agreement, the strike will grow further next weekend to include buses to and from large airports as well as more bus lines in Stockholm.
In Jönköping, Östersund and Gävle, service staff will be on strike although not the drivers. In Gävle and Jönköping this means that public buses will stop running around midday Tuesday.
The head of the bus employers sees no opening in the current conflict.
"Nothing is happening, the strike is most likely going to continue over the weekend," he says.
An agreement was reached on Wednesday night in the other conflict concerning rail traffic in Stockholm, Gothenburg and Skåne.
The new collective agreement for Seko will mean train drivers on Stockholm's metro gaining a 6.8 per cent pay rise over three years, the same as the other major agreements signed this year.
Rules on extra pay for parental leave were also agreed upon.
The union said it is "a great victory", and that they are pleased to have protected their members from worsening conditions.