The number of convictions for drivers aged 60 and over has risen over the past year, in some cases by as much as 19 percent.
Ministry of Justice statistics released to Newshub under the Official Information Act show that in 2016, 668 drivers 60 and over were convicted of driving under the influence, up 13 percent on 2015.
In 2016, 991 people of all ages were convicted of driving offences causing injury or death. Of those, 132 were caused by drivers 60 and over - an increase of 6 percent on the previous year.
The data also shows the number of drivers 60 and over convicted of dangerous driving rose 19 percent.
In total, crashes causing death or injury rose almost 8 percent in 2016 and convictions for dangerous driving have also risen just under 10 percent.
The New Zealand Transport Agency (NZTA) says there are more than 820,000 licence holders 60 and over. Nearly 4000 drivers of all ages were involved in crashes in 18 months between August 2015 and January 2017.
NZTA used to require practical tests for drivers at the ages of 75, 80 and every two years after that, however that stopped a decade ago.
Now, those drivers must get a medical certificate from their doctor to renew their licence.
However, doctors can require drivers to sit an on-road safety test with a testing officer before being given medical clearance.
According to the NZTA, the medical certificate measures a driver's health and vision to determine their ability to drive.
If a driver fails to get medical clearance from their doctor, their licence will expire on their next birthday and will have to re-apply should their individual circumstances change.
NZTA encourages senior drivers to stay up-to-date with their driving abilities and can find information or participate in interactive activities on their website for free.
Newshub.
