gordonski wrote:Then I wonder, why waze collects speed information and calculates average speeds for roads, when they are not needed IN ANY WAY?
Average speeds are realistic. Speed limits are theoretical.
You can have two roads with the same speed limit. One is lightly traveled, smooth, and straight with limited to no merges. The average speed may be well above the posted limit.
The other may be in an urban area, with lots of volume, rough road surfaces, many on and off ramps with not much room to merge. The average speed may be well BELOW the posted limit.
The average speed is what is important for routing.
Maybe it is a regional thing, but most everywhere in the US the speed limits are set according to political whim and not set by road engineers. And I would say the vast majority of the population ignores the speed limit on all but the smallest of local roads.