A complete shutdown of the Luas service looks very likely following Transdev's decision to put staff on protective notice.
The protective notice order has also come with warnings of pay reductions to counterbalance the cost of the strike action.
Owen Reidy, SIPTU divisional organiser spoke about the situation on
RTÉ's Morning Ireland program.
He said it was not "reasonable, sensible or logical" to issue an inferior set of proposals to workers following their rejection of a better deal.
"We'll consider this carefully but it's something that's seriously on the agenda."
