A speed enforcement is in operation until midnight.
Over 130 motorists have already been caught speeding on National Slowdown Day.
The Gardaí and RSA are conducting another national speed enforcement operation until midnight.
Among those caught was a driver travelling at 114 kilometres per hour in an 80 kilometre zone on the R445 in Portlaoise and another doing 107 kilometres per hour in a 80 zone on the N81 in Tullow, County Carlow.
Gardaí are reminding motorists to think of the consequences of their actions on the roads.
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