The 'stop and go system' in place along the N55 between Killydoon and Ballytrust in Co Cavan has been cleared and the road reopened.
It follows a two vehicle collision in the area this morning.
Two people are in hospital but their injuries are not thought to be life threatening.
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Meanwhile, Gardai were alerted to the incident before 9:30am.
Emergency services attended and those who were injured were taken to Cavan General Hospital.
