CONTACT CENTRE WAIT TIMES: Our Contact Centre is currently experiencing significant wait times. View frequently asked questions

SCAM ALERTS: Report a phishing scam or learn about the latest phishing emails

ROAD USER CHARGES (RUC) DISCOUNT: Find out more about the temporary RUC reduction scheme

ONLINE SERVICES: We are currently experiencing issues with all our online services at the moment. We are working to resolve the services as soon as possible. We apologise for any inconvenience caused.

COVID-19 SERVICES UPDATE: Information on Waka Kotahi services, extensions and more

ONLINE SERVICES: We currently have an issue with receiving some payments and are working to resolve this issue as quickly as possible. We apologise for any inconvenience.

EASTER WEEKEND – PLAN AHEAD: Heading away for the long weekend? Check our holiday journeys tool(external link)

SCAM ALERTS: Refund email and Vehicle licence (rego) renewal phishing emails

Noise barriers (bunds and walls) are probably the most widely recognised form of noise mitigation used for state highways.

Noise barriers need to be considered in the context of providing effective noise relief, while also addressing issues of appearance, urban design, site constraints, maintenance (including whole-of-life costs), safety, graffiti, cost (value-for-money) and sustainability. To this end, it is important that the increasing number of noise barriers being constructed for state highways should be built with a coherent, consistent approach, rather than ad hoc solutions to individual sites.

A range of resources are available to assist in the design of barriers.

Design guide

We have produced a State highway noise barrier design guide to aid our staff and contractors with the design, construction and maintenance of noise barriers. The guide seeks for noise barriers to be fit-for-purpose as noise control structures, while at the same time minimising their impacts on the immediate surroundings and the wider environment. Territorial Authorities may also find this guide useful in regards to noise barriers for local roads.


Our requirements for noise barriers are included in the P40 specification.

Anti-graffiti coatings

Anti-graffiti coatings used on state highway noise barriers shall be chosen from the list of products [PDF, 126 KB] approved by the AMA.

For further information contact