Italy speed camera tolerance and fine calculation rules

In Italy, the application of speed camera tolerance is often misunderstood. Rather than adding a 5% margin to the posted speed limit, regulations require a reduction to be applied to the speed recorded by the device before determining if a violation has occurred.

For speeds up to 100 km/h, the law mandates a reduction of 5% of the measured speed, with a minimum deduction of 5 km/h. For example, if a device records 52 km/h in a 50 km/h zone, the 5% margin (2.6 km/h) is superseded by the 5 km/h minimum, resulting in a corrected speed of 47 km/h. Once speeds exceed 100 km/h, the 5% reduction becomes greater than the 5 km/h minimum and is applied accordingly.

This mechanism applies to both instantaneous speed measurements and average speed systems, such as Tutor and Vergilius. In a 30 km/h zone, a recorded speed of 35 km/h results in a corrected speed of 30 km/h, meaning no fine is issued. However, a recorded speed of 36 km/h would result in a corrected speed of 31 km/h, triggering a penalty.