The Supreme Court sets criteria on the margins of error for speed cameras
The Criminal Chamber has established that mobile traffic radars that measure speed from a fixed location, on tripods or in stationary cars, have a margin of error of 5% and not 7%, for 
what attributes to this type of devices the same percentage as to fixed ones. With this criterion, the court has dismissed the appeal filed by a driver, who was recorded by a radar when he was driving at 214 km / h on the AP-68 In the case raised in this appeal -the magistrates point out- This percentage is relevant, because, depending on the margin of error that is applied, the driver can be acquitted or convicted.
The conclusion reached by the magistrates of the Criminal Chamber is that "If the measuring device, kinemometer, is used from a fixed location, that is without movement, whether fixed or static, the margin of error is 5%", and they further affirm that this cataloging is "logical" because "the measurement of speed, from a fixed radar, or from an installation without movement, supposes a smaller margin of error than the measurement made from a moving device".