The operation will continue until 7am tomorrow morning.
Gardai in the midlands are asking people to reduce their speed on National Slow Down Day.
A motorist has been caught driving at 68km/h in a 50km/h Zone on the N80 Main Street in Stradbally, while another driver was travelling at 118km/h in a 100km/h Zone on the N4 Clongawny in Mullingar.
A vehicle was also spotted driving at 64km/h in a 50km/h Zone on the Arden Road in Tullamore.
Nationally 454 vehicles have been detected speeding today.
The operation will continue until 7am tomorrow morning.
Westmeath Roads Policing Unit Sgt. Cormac Moylan says motorists who speed are putting lives at risk:
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