Bus drivers will now have to be on their best behaviour.
The country's largest operator of urban bus services, NZ Bus, has spent millions on new technology which provides real-time information to drivers on their driving style.
Chief information officer Glen Mitchell said they will be given feedback on a number of aspects, including speeding.
"There is idling, so if you're idling for too long that uses fuel inefficiently.
"There's braking and accelerating, as well as speeding.
