CREDIT: Carlow/Kilkenny Gardaí
Carlow Roads Policing Unit were conducting a Crime Prevention Checkpoint at Ballyvergal on the Dublin Road in Carlow in the early hours of Friday morning last.
They carried out a roadside drug test on a driver which proved positive.
The male driver was arrested and processed at Carlow Garda Station.
Gardaí said: "A conviction for drug driving will mean the loss of your licence. Never drive under the influence of an intoxicant."