Workers on Arriva Rail North are to stage a series of fresh 24-hour strikes in the bitter row over the role of guards.
Members of the Rail, Maritime and Transport (RMT) union will walk out on three consecutive Saturdays, August 25 and September 1 and 8, following the failure of talks.
The union has been embroiled in a row over driver-only operation for more than two years and has launched strikes against four train operators still involved, including Arriva Rail North (Northern).
RMT general secretary Mick Cash said: "RMT committed to talks in good faith with Northern but, instead of making progress towards a settlement that matches the best practice in the rail industry as negotiated elsewhere, the company have opted instead to play and fast and loose making a mockery of the exercise.
"Our reps know when they are being strung along and it's that attitude from the company that has forced us to announce this next phase of action.
"RMT members on Arriva Rail North have been in dispute for well over a year now in a battle to put public safety before private profit and we are angry and frustrated that a genuine opportunity to reach an agreement has been kicked back by the company.
"German-owned Northern Rail want to run nearly half a million trains a year without a safety-critical guard on board in a move that would wreck both safety and access to services and they should listen to their frontline staff and pull back from that plan immediately.
"RMT recently secured an agreement on Greater Anglia that enshrine the guard guarantee. Similar agreements have also been reached in Wales and Scotland. Arriva Rail North need to do the right thing and come to an agreement that secures a guard on their trains too.
"We thank the public for their support and understanding throughout this dispute over rail safety and access and the union remains ready for genuine and serious talks."