For further information contact pavements@nzta.govt.nz
Published: 2006
HM23 Unsealed pavements replaces specifications TNZ C11, C12, C13 and C14. However, if TNZ C11, C12, C13 or C14 are referred to in existing contract documents then you may continue to use them.
Published: 1992
This specification and guidance notes set out the requirements and maintenance standard for the repair of potholes in unsealed roads.
Unsealed pavements: repair of potholes (C11)
Note: This specification was withdrawn in 2011 as it has been replaced by HM23 Unsealed pavements. However, if TNZ C11 is referred to in existing contract documents then you may continue to use it.
Published: 1995
This specification guidance notes sets out the requirements and standards of work to maintain the maintenance aggregate of an unsealed road carriageway including running surface, shoulders, feather edges and surface water channels.
Unsealed pavements: surface and shape restoration (C12)
Note: This specification was withdrawn in 2011 as it has been replaced by HM23 Unsealed pavements. However, if TNZ C12 is referred to in existing contract documents then you may continue to use it.
Published: 1992
This specification sets out the requirements for repairs to the pavement structure in unsealed roads, where a digout is required.
Unsealed pavements: digout repairs (C13)
Note: This specification was withdrawn in 2011 as it has been replaced by HM23 Unsealed pavements. However, if TNZ C13 is referred to in existing contract documents then you may continue to use it.
Published: 1991
This specification sets out the requirements for the supply, cartage and laying of maintenance aggregate for unsealed roads, including preparation of the surface prior to laying.
Unsealed pavements: supply and place maintenance aggregate (C14)
Note: This specification was withdrawn in 2011 as it has been replaced by HM23 Unsealed pavements. However, if TNZ C14 is referred to in existing contract documents then you may continue to use it.
