Dust Suppression

Dust Suppression (also Dust Control) is any activity that aims to reduce the amount of dust raised from an Unsealed Road due to the passage of a vehicle along it.

Photo: Dust Control Solutions

Dust Suppression Techniques

Application of a wearing surface

The best way to permanently reduce dust is to construct a sealed road. This typically requires a costly new sealed road pavement to be constructed, but some Councils have experimented with applying a GATT Seal to an existing gravel pavement, and Narrandera Shire Council has been successfully trialing Otta Seals.

Application of water

The application of water with a water truck is a tried an true method of dust suppression especially during road construction, but it is typically effective for only a short period of time.

Application or a chemical.

A number of chemical dust suppressants have been used, including;

  • Polymers
  • Bitumen Emulsions
  • Magnesium Chloride
  • Waste Oil

Better Unsealed Pavement Materials & Road Design

  • The type of rock used when resheeting a road will obviously effect the amount of dust liberated. A crusher dust for example will typically produce less dust than limestone gravels.
  • A combination of processed gravel and exagerated road cross fall as been shown to reduce dust.

Speed Limits

  • Reducing vehicle speed reduces the amount of dust lifted.

Related Pages


The following site members have contributed to this page:

External Links & References

  1. ARRB Road Dust Control Special Report
  2. DustBloc
  3. Dust Control Solutions
  4. Google Search
  5. Roads.co.nz 2017 Presentations
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