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Police measure speed using a range of devices, such as radar, laser devices, speed cameras or by visual observation. In South Australia, devices used to measure speed must be approved under the Road Safety Act 1961 (SA) and its associated regulations. These devices must be properly and regularly calibrated in accordance with industry standards. Police officers using these devices must also be trained on how to use them.

Generally, a police officer using a speed radar must take into account possible variations in accuracy of the device when issuing a speeding fine. Under Australian Standard AS 2898-2003, the range of accuracy can be as wide as plus or minus 3 kilometres/hour, depending on the type of radar being used and the speed at which the vehicle is travelling.

If you want to challenge your speeding fine (or ‘expiation notice’), you have the option of seeking a review on the basis that you believe the fine is incorrect or a mistake was made when it was issued. You can request the police to carry out a review by lodging an application online at www.police.sa.gov.au. You cannot request a review if you have already paid the fine or the matter has been referred for enforcement. If the matter has been referred for enforcement, you may still have the option of electing to have the matter heard in court. In these court proceedings, the police will be required to certify the accuracy of the speed radar used to issue your fine.