How Do Speed Zones Work?

  • Updated

The majority of NZ speed zones are identified within the Argus system, which monitors the speeds your vehicles’ travel through these zones.

This data is then used in our Overspeed, Risk Point and Driver Behaviour Reports.
The rules we use when checking vehicles speeds in these zones are listed below:

  • School speed zones are only active during weekdays from 7-9 am & 2-4pm.
  • We only report on or apply risk points to speeding vehicles if they have 8 or more GPS satellites triangulating their position. This enables us to provide the most accurate and guaranteed data.
  • Speed zone changes take effect at the signpost.
  • We like to keep our data as accurate as possible, but if for some reason you find that we are not reporting the correct speed limit, please click Risk Point Query beside the point you are querying in the Risk Point Report or, submit a support ticket to let us know to update our database.


Note: Speed zone changes take effect at the signpost. Before reaching the speed-limit sign, make sure you:

  • Reduce your speed if the sign indicates a lower speed.
  • Do not increase your speed until you pass the sign if the sign indicates a higher speed.

For further information about speed zones, check out the NZTA article About speed limits.

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