Gritters in Carmarthenshire County Council Highways department have announced dates of industrial action in January.
The move comes after Carmarthenshire council walked away from talks with the Unions.
Gritting staff will first go on strike on the 6 and 7 January. They will then down their shovels between 17and 21 January and again between 24 and 28 January.
With the current shortage of HGV drivers' strike action could see the entire road network of Carmarthenshire come to a standstill.
Earlier this month around 70 gritters in GMB, Unison and Unite unions overwhelmingly voted for industrial action early in the new year.
The dispute follows on from action taken two years ago that saw the introduction of the comprehensive collective agreement between the union and the authority.
Peter Hill, GMB Regional Organiser said:
"Due to the intransigence of Carmarthenshire County Council our members now have no other option than to take action.
It's not something we take lightly but until they come back to the table, we will continue"
"It's a disgrace that a local authority refuses to follow a signed agreement, and then breaks off talks meant to resolve the problems.
“No other local authority in Wales behaves in this way"
