Our distances are not driving distances, but are calculated as a 'straight-line' distance starting from Trussville. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line drawn from Point A (ie- Trussville) to Point B.
Our distance measurements begin at a specific point in Trussville. The point that we are using is located at these GPS coordinates - Latitude: 33.6377, Longitude: -86.5843 [Map]. In this case, the coordinates for Trussville have been provided by the Geographic Names Information System (GNIS).