More than 120 pensioners and disabled people defied the decision to axe free travel by refusing to pay when they boarded trains on Monday of this week.
So many turned up at Barnsley station that Northern Rail announced that the day would be a free travel day.
Barnsley campaigners travelled to the Meadowhall Transport Interchange where they met up with other activists.
Protest organiser George Arthur said, “Today is a victory for us. We held a mass meeting at Meadowhall and voted to do the same every Monday until free travel is restored.
“The pensioners united will never be defeated!”