Waka Kotahi says evidence thousands of Auckland drivers are using handheld cellphones or not wearing seatbelts is just a small slice of the problem.

It caught 242,000 potential offences using safety cameras at three locations in a six-month trial.

Waka Kotahi's Tara Macmillan told Mike Hosking fines won't be issued, because punishment isn't under the Agency's mandate.

She says the legislation doesn't let it issue fines.

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