The NSW government will sue the state's rail union over its attempts to shut down Opal card readers, saying the industrial action is illegal and poses a possible danger to commuters.
From Thursday, Opal card readers will be switched off at train and metro stations every weekday between 3pm and 7pm after members of the Rail, Tram and Bus Union (RTBU) voted overwhelmingly in favour of the action.
Transport Minister David Elliott said the government, along with Sydney Trains, had made the decision to sue the Rail, Tram and Bus Union in the Federal Court over the action, and seek damages.