Over in the UK, research shows more drug-drivers have been arrested than drunk drivers by some forces.
Data shows over 48 percent of roadside arrests were for drug-diving, with drink-driving figures reduced.
UK correspondent Enda Brady says younger generations were more likely to consume cocaine and cannabis than drink before getting behind the wheel.
LISTEN ABOVE

Enda Brady: UK correspondent on the additional calls for Sir Keir Starmer to resign
04:23

Paul Bloxham: HSBC Chief Economist ahead of Australia's 2026 federal budget
04:17

Jamie Mackay: The Country host on what the latest Rabobank agribusiness monthly report means for Kiwi farmers
04:46