Police are urging Northland drivers to be their eyes and ears by dobbing in dodgy driving.
Drivers are being warned of a police speed enforcement campaign penalising drivers caught exceeding the speed limits by more than 4km/h, but speed isn't the only thing to watch.
Hazards on the road and dodgy driving can be reported via the *555 traffic safety line.
Northland road policing Senior Sergeant John Fagan said tip-offs from the public were incredibly useful for police.
"We get all sort of [calls]. People cutting corners ... when we catch up to them they could be drink-drivers. The little things sometimes lead into the big things so we encourage people to keep using *555 for any poor driving they see, especially over the holidays."