Now we can overlap different polygons over each other, but if we create one Polygon for a school most of the times this Polygon has to go over itselft to cover the whole School zone, unfortunately if you go over the same polygon this will have a conflict and the area where is overlapping opens up, not allowing for the same polygon to overlap, so right now we have to bring part of the polygon very close to the other part and then extend the other side to the School sign without overlapping. this will allows us to created a School zone easily with the same Polygon being able to overlap.