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The Transport Services Technical advice note (TAN) is a formal memo which keeps all relevant people up to date and aware of any new releases, interim acceptances, changes and updates to technical information, specifications, legislation, etc in relation to highway projects.

This is being used in place of the email memos you may have been receiving from the technical teams across the Transport Services group.

The Technical advice note series should be seen as the one source of truth associated with changes to our technical requirements.

It is sent to registered users, both internal and external to the NZ Transport Agency.

Subscribe to the Technical advice note - the one source of truth for highways information.

Search for TANs posted in 2019

Search for TANs posted in 2020

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Search for TANs posted in 2022

For further information contact hip.feedback@nzta.govt.nz.

#20-05 Contract Procedures Manual (SM021)

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Procurement team, Waka Kotahi NZ Transport Agency

This note is to advise that the third edition of the Waka Kotahi NZ Transport Agency Contract Procedures Manual (SM021) has been released to be used for all future procurement of infrastructure projects and is available for download from the Waka Kotahi website.  

#20-06 State Highway Construction Contract Proforma Manual (SM031) Issue 16

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Procurement team, Waka Kotahi NZ Transport Agency

This note is to advise that issue 16 of the Waka Kotahi NZ Transport Agency State Highway Construction Contract Proforma Manual (SM031) has been released to be used for all future procurement of infrastructure projects and is available for download from the Waka Kotahi website.

#20-07 State Highway Maintenance Contract Proforma Manual (SM032) Issue 11

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Procurement team, Waka Kotahi NZ Transport Agency

This note is to advise that issue 11 of the Waka Kotahi NZ Transport Agency State Highway Maintenance Contract Proforma Manual (SM032) has been released to be used for all future procurement of infrastructure projects and is available for download from the Waka Kotahi website.  

#20-11 Personal Protective Equipment and Site Access Requirements

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Waka Kotahi NZ Transport Agency

This note advises of changes to the health and safety and site access requirements that clarify the standards for Personal Protective Equipment (PPE) and access requirements and helps establish a better framework of clear expectations for our contractors. The changes outlined in this note shall be implemented from the date of publication.

#20-04 Update to State Highway Control Manual (SM012)

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Operational Policy, Planning and Performance (OP3) team, Waka Kotahi NZ Transport Agency

A new version of the SM012 manual is now available to assist practitioners involved in state highway corridor management to carry out their day to day tasks. The content of the new version can be used as guidance with immediate effect.

#20-10 Use of hollow bar ground anchors and soil nails

Published: | Category: Technical advice note | Audience: Road traffic engineers & consultants | Author: Geotechnics, Waka Kotahi NZ Transport Agency

This note is to advise that there is an issue with the use of hollow bar anchors and soil nails as an anchorage method and, as a result, this methodology must not be used unless its suitability for anchoring structural works as designed is demonstrable. The new requirement for hollow bar anchors and soil nails applies from the date of this notice for Waka Kotahi NZ Transport Agency, and may be used by any other road controlling authority.

#20-08 Use of GAP65 as a drainage medium to retaining and geotechnical structures

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Geotechnics team, Waka Kotahi NZ Transport Agency

This note is to advise that there is an issue with the use of GAP65 as a drainage material and, as a result, this material must not be used unless its suitability for the works as designed is demonstrated. The new requirement applies from the date of this notice.

#20-09 Use of sonic drilling in ground investigations

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Geotechnics team, Waka Kotahi NZ Transport Agency

This note is to advise that there is an issue with the use of sonic drilling as an investigation technique in the North Island and, as a result, this methodology must not be used unless its suitability for the works as designed is agreed with the road controlling authority. The new requirement applies from the date of this notice.

#20-01 Procedures for design and indirect tensile strength testing of modified and bound pavement materials

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Technical Services team, NZ Transport Agency

This note is to advise that NZ Transport Agency (NZTA) Specification T19:2020, Procedures for design and indirect tensile strength testing of modified and bound pavement materials, has been released for general use and is available on the Transport Agency’s website for download.

#20-02 Pilot specification for in-situ subgrade stabilisation

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Technical Services team, NZ Transport Agency

This note is to advise that the NZ Transport Agency (NZTA) Specification B/9P:2020, In-situ subgrade stabilisation, has been released for use on agreed pilot projects and is available for download from the Transport Agency’s website.