Speed camera van workers are to strike over the October Bank Holiday.
GoSafe operators who are members of SIPTU will take part in a 72 hour stoppage from 9am on Saturday the 26th.
The escalation comes as part of the unions ongoing dispute with the company over staff working conditions and union recognition.
It follows similar action last month which saw operators down tools for 24 hours.
SIPTU Organiser, Brendan Carr says their members have been left with no option other than to escalate this dispute and are only taking this action as a last resort.