Both arrests were made on the motorway over the weekend.
Two motorists have been arrested by Gardaí in Laois for driving under the influence.
The first was an unaccompanied learner driver, who was stopped on the M7 after an alert signaled expired tax and NCT.
Officers said there was a strong smell of cannabis from the vehicle, and the driver failed the roadside drug test.
Gardaí say a blood sample was taken and a prosecution will follow.
Another motorist was arrested on the M8 in Laois, after they were found drunk driving and travelling at 163 km/h.
Gardaí say court proceedings have commenced in relation to that arrest.
Enterprise Minister Downplays Government's Ability To Help On Home Heating Oil
Midlands Prison Hit By Mass Overdose Incident
Offaly Man To Complete Marathon Challenge In Honour of Ashling Murphy
Recruitment Of First-Ever Professors For Ireland's Technological Universities Launched
Minister For Rural And Community Development Marks Two Official Openings And Launches In Laois
Offaly Soccer Club Granted Planning Permission For Facility Expansion
Offaly TD Warns Garda Protection For TDs Could Affect Public Access
People in Laois Facing Extended Water Outage Today