Seasonal Average Road Speeds
Roads have a highly variable average speed and driveability that very much affected by the season.
Waze should look for and track the seasonal road average speeds. In the winter months especially, a road which typically is a great shortcut from one interstate to a town is now very slow because it isn't maintained as well as the indirect interstate route. The indirect route is actually faster based on the other road having a slow average speed in the winter.