Police in Whangārei are disappointed by the behaviour of some motorists stopped at checkpoints on Good Friday.
One car, driven by a man with excess breath alcohol, was found to have four child passengers who were not wearing seatbelts.
Police said one of the children was sitting in the footwell of the front passenger seat.
Another man was caught driving at excess speed, and his license was suspended for 28 days.
In a seperate incident, a 17-year-old female passenger was arrested in relation to the possession and supply of cannabis.
A total of six drivers were charged with excess breath alcohol and a number face various infringement notices.
However, Whangārei Police said they were pleased there were no fatalities on Northland roads and commended those who drove safely.
Acting Inspector Rob Huys said while police worked hard to keep the roads safe, it was everyone's responsibility.
"Please buckle up, avoid alcohol and drugs, and put away your phones and other distractions," he said.
"Mind your speed so we all get to our destinations safely."