Ability to clear street-visited memory from the map

After getting the completionist badge for a region there are all sorts of reasons one can invent for wanting to revisit every street in that area. It would be really nice if there were an option to clear the street-visited memory for a given region on the map so that you could once again see each street marked as you visited it. I would imagine (naively, perhaps) that this would be a relatively simple feature to add to the game, as it would not involve creating much of anything new - perhaps a "clear memory" button in the region map that became activated after achieving the completionist badge. If there is a list of new features to someday add, perhaps this could be put on the list.