630 drivers were caught speeding during the first 24 hours of a Garda bank holiday road safety campaign.
The operation began yesterday morning, and officers have so far arrested 24 people found to be driving under the influence of drink or drugs.
One driver was detected doing 120 kilometres per hour in an 80 zone at Walderstown in Co Westmeath, while another was doing 95 kilometres per hour in a 60 zone in Castleblaney in Co Monaghan.
The operation continues until Tuesday.