Police in the Wellington region have been targeting secondary school pupils at lunchtime checkpoints.
They say it is part of a wider initiative to educate young people about driving laws and the recent change to zero breath alcohol for motorists aged under 20.
The checkpoints have been set up near secondary schools in Wairarapa, Upper Hutt, Lower Hutt, Wellington, Kapiti and Otaki over the past two weeks.
Wellington district road policing manager, Inspector Peter Baird, says police have been checking licences and breath-testing young people.
Mr Baird says there have been some breaches to licences, but no one has tested positive for alcohol so far.
Police say more checkpoints will be set up later in the year.