BUS services at Dearne, Rotherham and Barnsley will be affected by four days of strike action beginning today, and on November 21, December 2 and 3.
The union Unite, representing Stagecoach drivers at Rawmarsh and Barnsley, announced the strike action after a dispute over pay failed to reach a resolution.
Stagecoach has drafted in 100 relief drivers and claims services will continue to run on most routes between 7am and 6pm, with a flat £1 fare.
School services will be unaffected.
Pay talks between Unite and Stagecoach management have been ongoing since April.
Paul Lynch, managing director of Stagecoach Yorkshire said: “I am very disappointed that we have not been able to reach an agreement after many months of negotiation.
“We will be working extremely hard to ensure that the majority of passengers are not affected by the strike action and have put together a robust contingency timetable. Our priority is to provide customers with a near normal service and we are drafting in more than 100 drivers from other areas, as well as additional managers, to make sure that any disruption is kept to a minimum.”
Doncaster bus routes are largely unaffected by the strike.
A full list of services which will continue to operate are available at www.stagecoachbus.co/yorkshire, or by calling traveline on 0871 200 22 33.
Routes with no service include that of 67A between Barnsley and Wombwell, the N66 Barnsley to Elsecar, 59A Barnsley to Royston, and the 42 Doncaster to Scawsby.