One unlicenced taxi driver was also detected during the operation overnight
Six motorists have been arrested for drink driving offences and three vehicles seized for insurance and tax issues.
Gardai attached to the Regional Traffic Division in the Dublin Metropolitan West, North and South mounted a checkpoint on the N3 dual carriageway near Clonee between midnight and 3.30am this morning.
One unlicenced taxi driver was also detected during the operation, which also involved staff from Revenue Customs Service and the National Transport Authority.
In total, 217 motorists were breath-tested during the course of the checkpoint.