375 drivers have been caught speeding across the country over the last 72 hours.
One motorist was travelling at 156 km/hr in a 100k zone in Donegal.
While another was detected doing 121 in a 60 zone on the Navan Road.
29 motorists were arrested for drink or drug driving during that same period.
Gardaí are repeating their appeal to drivers to Slow Down during the extremely icy weather.
A garda spokesperson says: "Over the last 72 hours, while roads across the country have experienced freezing temperatures, 375 drivers have been detected for speeding in excess of the posted speed limit.
"As is continuously highlighted speed limits are not targets. Drivers should always travel, not just within the speed limit, but at an appropriate safe speed for the weather, road and traffic conditions.
"Examples of speeding detections made by members of An Garda Síochána and Mobile Safety Camera Vans (GoSafe, Road Safety Partners), include:
99km/hr in a 50km/hr zone on the Dublin Road, Galway
97km/hr in a 50km/hr zone on the Dublin Road, Galway
84km/hr in a 50km/hr zone on the N3, Virginia, Cavan
83km/hr in a 50km/hr zone on the R188, Drumbear, Monaghan
80km/hr in a 50km/hr zone on the Dublin Road, Cavan
121km/hr in a 60km/hr zone on the Navan Road, Dublin
96km/hr in a 60km/hr zone on the R188, Drung, Cavan
112km/hr in an 80km/hr zone on the N4, Lucan, Dublin
97km/hr in an 80km/hr zone on the N68, Kilmihill, Clare
156km/hr in a 100km/hr zone on the N15 Drumrat, Donegal
125km/hr in a 100km/hr zone on the N26, Ballina, Mayo
"In addition 29 drivers were arrested in the last 72 hours for driving under the influence of an intoxicant (alcohol and drugs)."
"Irresponsible"
Chief Superintendent Jane Humphries says: "The disregard for speed limits and safe speeds by a small number of drivers is irresponsible and dangerous, not just for their own safety, but for the safety of the many workers who are busy keeping our roads open for essential use in this excessive cold spell and other road users who are supporting road safety.
"Drivers who continue to drive at excessive speed are a menace on our roads.
"An Garda Síochána continues to enforce the road traffic legislation throughout this period in addition to working and supporting our communities across the country and in the most affected counties during this cold weather period."
