Glen Koorey: senior transport engineer at Viastrada on lowering speed limits on State Highways - Heather du Plessis-Allan Drive

Plans are underway to slow motorists down, as Whaka Kotahi reveals the roads they've identified with unsafe speed limits.

These include a lot of roads within the State Highway network outside of Auckland, with Transmission Gully and the Waikato expressway being exceptions.

Glen Koorey, a senior transport engineer at Viastrada who was involved with the project, argued in defence of the lowered speed limits.

"It's one of the most important things we need if we're going to get our road safety targets down. We've got a big roading network and we don't have the dollars to fix them all."

LISTEN ABOVE

See omnystudio.com/listener for privacy information.