The driver was trying to get to Dublin Airport when stopped.
A driver has been arrested in Laois for travelling 56 km/h over the speed limit.
The motorist, driving at 176km/h, was stopped by the county's Roads Policing Unit on the M7 yesterday.
The driver was a tourist in a rental car making their way to Dublin Airport.
Gardaí say they also stopped a number of drivers, and issued fixed charge notices, for mobile phone offences in the county as well.
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