Transport Minister Paschal Donohoe said new roadside drug tests will save lives over the Christmas period.
Minister Donohoe’s comments come as the Gardaí and Road Safety Authority take part in a major clampdown on drug and drink-driving.
The new laws introducing the blood and impairment tests came into force at the end of last month - and the festive season will mark their first major outing.
Paschal Donohoe said he was confident gardaí will enforce the laws properly.
"I'm absolutely certain the Gardaí will be able to implement this test in line with their own high standards of professionalism," he said. "Gardaí have been at the centre of successfully reducing the loss of life and serious injuries on our roads."