Transit point is an exact point in a map. If I define that my route must go through city X, the navigation applies exact point in the center of the city X and leads me though this point. If my target idea is to use the city X only as a point around which the route runs, there is no way how to do it. The new "around point" could define only area, through the route should run to the end of the route. The navigation could go through the defined "around point" using optimum way.