Hunter Valley coal train drivers have voted to strike.
Workers at Pacific National have voted overwhelmingly in favour of industrial action after wage negotiations halted, according to the ABC.
However, while the workers' union has agreed to a strike, it had not defined a date when industrial action will begin.
"We intend to meet internally Monday and talk through that," the Rail, Tram, and Bus Union's Robert Haydon explained.
"We've always said it's our last option to take any form of industrial action.
"We've been placed into this situation because the actions of the company putting out their non-union agreement for a vote."
In a statement by Pacific National's owners, Asciano, it voiced its disappointment in the move.
It went on to say it is seeking the best outcomes for its customers and the industry despite the action.
This is not the first time the rail industry has seen industrial action in the Hunter Valley.
In April last year Downer EDI coal train maintenance workers carried out strikes over similarly stalled wage negotiations.