Auckland Transport is set to put the brakes on motorists today with a decision to reduce speed limits across the city.

The decision — which aims to reduce deaths and injuries on Auckland roads — will have ramifications for road users and bring intense scrutiny to the council-controlled organisation (CCO).

Hundreds of suburban and rural roads will have speed limits dropped and the entire central city will become a 30km/h zone under a bylaw being voted on by the AT board.

The biggest impact could be lower speeds on rural roads, with almost nine out of 10 of the affected