Scepticism over whether handing over speed camera duties will reduce fatal speed-related crashes

NZTA is taking the job from Police, with plans to increase cameras number from 150, to about 800, as part of a high-tech development of the network.

It's estimated tit will process about three million infringements annually by 2030.

But road safety campaigner Clive Matthew-Wilson says they don't target those who cause most accidents.

He says those who actually cause them are a very small group of poorly educated people, usually with substance abuse problems and an attitude.