I hate this because I will be doing real 100km/h and someone will break to 95 because they see a speed camera but they are in fact then only doing 90...
It's annoying because every car is different.
If you read speed data from the
ECU via the OBD port it gives you the unadjusted raw value, so maybe get a separate display hooked up if you want? That's what I have on mine.