One such motorist was caught in Westmeath.
Several motorists in the midlands have been caught exceeding the speed limit during national slow down day.
A motorist in Westmeath has been caught doing 128km/h in a 100 zone during the first five hours of national slow down day
The speeding driver was clocked on the N4 in Cullen Beg Mullingar.
Meanwhile in Offaly speeds of 111km/h, 117km/h, 114km/h and 120km/h were detected on roads with an 80km/h speed limit.
Slow Down day will remain in place until 7 o'clock tomorrow morning.
Other examples of excessive speed on our roads include:
94km/h in a 60km/h zone on the N4 Drishoge Carrick-On-Shannon Roscommon
113km/h in a 80km/h zone on the R245 Cashelshanaghan Letterkenny Donegal
127km/h in a 100km/h zone on the N22 Gortatlea Tralee Kerry
106km/h in a 80km/h zone on the R512 Grange Bruff Limerick
70km/h in a 60km/h zone on the N25 Grahormack Tagoat Wexford
69km/h in a 50km/h zone on the R708 Ballytruckle Green Waterford