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Rules of the Road

RSA handbook · 292 pages · 271 embedded images

Speed limits

Page 116

Cruise control

Avoid using cruise control in heavy rain, hail, snow, fog and icy conditions. Cruise control can potentially reduce the control you have over your vehicle and impact on your reaction time in dealing with a hazard.

Avoid driving too slowly

In normal road and traffic conditions, keep up with the pace of the traffic flow while obeying the speed limit. While you must keep a safe distance away from the vehicle in front, you should not drive so slowly that your vehicle unnecessarily blocks other road users. If you drive too slowly, you risk frustrating other drivers, which could lead to dangerous overtaking. However, remember: you must not drive at a speed at which you cannot stop the vehicle within the distance you can see to be clear ahead.

Speed limits

Signed speed limits set the maximum speed at which vehicles may legally travel on a section of road between speed limit signs, assuming the vehicles are not restricted in any way.

The signs indicate the maximum speed at which your vehicle may travel on a particular road or stretch of road, not the required speed for the road.

There are two types of speed limit:

  • speed limits that apply to roads; and

speed limits that apply to certain types of vehicles.

Speed limits on roads

All public roads have speed limits. In most cases, a ‘default’ speed limit applies. This automatically applies to a particular type of road if there is no speed limit sign to show otherwise.

Related practice questions

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Extracted from the RSA Rules of the Road, Revision 9, May 2026. Source PDF · reuse permission unconfirmed.