COVID-19 SERVICES UPDATE: Information for all alert levels, Waka Kotahi services and more

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

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

State highway roading projects can generate dust which has the potential to affect health and become a nuisance to the surrounding public and environment.

Potential sources of dust include:

  • Roads and access areas
  • Excavation and disturbance of dry material
  • Loading and unloading
  • Stockpiling of materials

The adverse effects of dust depend on the size of the particles emitted. Human health effects of airborne dust are mainly associated with fine particles (eg smaller than 10 micrometres, PM10). Nuisance effects are most commonly associated with coarser particles (eg larger than 20 micrometres, PM20) and include:

  • soiling of clean surfaces
  • dust deposits on vegetation
  • contamination of roof-collected water supplies
  • visibility impacts, which can also be a safety concern for road traffic in extreme dust conditions.

Dust emissions can be mitigated by adopting best practice in construction site management, such as covering exposed areas, using water trucks and wheel washes, and minimizing the number of truck movements.

Guidance on assessing, managing and monitoring construction dust emissions is available in the resources listed below. The Erosion and sediment control guidelines for state highway infrastructure covers dust control and includes complementary guidance about the control of erosion caused by wind.

For further information contact environment@nzta.govt.nz.