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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

Search for TANs posted in 2021

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

#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.

#20-03 Changes to the physical works prequalification pack

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

This notice advises that the latest changes to the Prequalification for physical works information pack are available to assist suppliers and project managers to more easily apply the prequalification protocols. This will enable a more consistent and expedited procurement process.

#19-16 Electrical issues identified in signal controllers

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

This notice advises that the NZ Transport Agency has recently become aware of electrical issues in some of the traffic signals controllers, managed within one of our maintenance contracts.  

#19-14 SM030 Professional Services Contract Proforma Manual update Amendment 9

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: System Design & Delivery

This note confirms that amendment 9 of the NZ Transport Agency’s SM030 Professional Services Contract Proforma Manual published in October 2019 is available on the Transport Agency’s website for download. This amendment to the SM030 Manual shall be implemented immediately for future contracts.

#19-11 Update to NZTA Guide to assessing air quality impacts from state highway projects

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Safe and Sustainable Transport team

The purpose of this note is to advise project managers that there has been an update to the Guide to assessing air quality impacts from state highway projects.

#19-12 Update to NZTA State highway construction and maintenance noise and vibration guide

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: Safe and Sustainable Transport team

The purpose of this note is to advise project and network managers that there has been an update to the State highway construction and maintenance noise and vibration guide.

#19-07 Bridge manual – mechanical reinforcement couplers and anchors – interim advice (July 2019)

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: System Design & Delivery

This technical advice note outlines interim requirements for the use of mechanical reinforcement couplers and anchors, subsequent to the publication of the Bridge manual 3rd edition amendment 3.

#19-06 Bridge manual, third edition, amendment 3

Published: | Category: Technical advice note | Audiences: Road traffic engineers & consultants, Roading contractors | Author: System Design & Delivery

This technical advice note confirms that amendment 3 to the NZ Transport Agency’s Bridge manual 3rd edition and the new Bridge manual commentary, both published in October 2018, are available on the Transport Agency’s website for download.