I get it, but if Apple mislabels the speed limit at 90 km/h in a 110 km/h road portion (say, they set it during the road works), then getting a repeated average speed reading of 105-115 km/h from all the cars going through that road portion might allow Apple to gauge the real speed limit and automatically correct it at their end. No need to drive all the Apple cars up and down the country every week then. Magic!
Very true and one way to improve maps; several areas I drive regularly show the wrong speed limit - higher or lower.
Although one place I live even if construction zones are present the average speed is usually much higher since the drivers view speed limits as advisory.