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One Network Road Classification

The One Network Road Classification (ONRC) is a classification system, which divides New Zealand’s roads into six categories based on how busy they are, whether they connect to important destinations, or are the only route available:

  • National
  • Arterial
  • Regional
  • Primary collector
  • Secondary collector
  • Access

Classification of New Zealand's roads using the ONRC was completed in 2013.

The ONRC is the primary tool developed through REG to enable operational and culture change in road activity management. It facilitates a customer-focused, business case approach to budget bids for the National Land Transport Programme.

Using the ONRC, local authorities and NZ Transport Agency can compare the state of roads across the country, and direct investment where it is needed most. Road users will see an increase in the quality of some roads, and a decrease in others that have been over-specified in the past.  Overall, New Zealanders will get the right level of road infrastructure where it is needed, determined by a robust, impartial, nationally consistent tool – the ONRC.

Related documents

Case studies demonstrating best practice in applying the ONRC and its performance measures

ONRC functional classification [PDF, 42 KB]

Tables of state highways in each ONRC classification category [PDF, 209 KB]

ONRC classification of state highways – North Island [PDF, 2.9 MB]

ONRC classification of state highways – South Island [PDF, 3.1 MB]

ONRC classification of state highways – urban [PDF, 3.7 MB]

ONRC performance measures

ONRC performance measures: a general guide [PDF, 495 KB]

The ONRC performance measures [PDF, 268 KB]

Road maintenance visual guide [PDF, 1.1 MB]

ONRC performance measures reporting tool(external link)

Publicity resources

ONRC customer levels of service [PDF, 56 KB]

ONRC picture illustration [PDF, 276 KB]

ONRC information table [PDF, 204 KB]

ONRC combined poster [PDF, 415 KB]

ONRC A4 leaflet [PDF, 414 KB]