Northland state highway speed review could affect two-thirds of network 9 May, 2021 06:00 PM 8 minutes to read Don Wilson, who owns OnRoad Transport, a livestock transport company, said reduced speed limits would add "significantly" to trip times. Photo / Supplied Don Wilson, who owns OnRoad Transport, a livestock transport company, said reduced speed limits would add "significantly" to trip times. Photo / Supplied The National Road Carriers Association is calling for an "urgent review" of the state highway network as consultation begins to reassess speed limits on nearly two-thirds of Northland's state highways. Speed limits on 626km – 64 per cent - of the 978km of roading the Government's transport agency maintains across the region could be slashed as part of sweeping nationwide changes to reduce the road death toll.