Our distances are not driving distances, but are calculated as a 'straight-line' (or point-to-point) distance starting in Rural. A straight line distance ignores obstructions like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Rural) to Point B.
Our distance measurements begin at a specific point in Rural. The point that we are using is located at these GPS coordinates - Latitude: 31.8643, Longitude: -87.7386 [Map]. In this case, the coordinates for Rural have been provided by the Geographic Names Information System (GNIS).