For the purposes of this division, unless otherwise indicated, the following terms shall have the meanings respectively ascribed to them by this section:
All measurements shall be from the outer edges of the regularly used buildings, parking lots, storage or processing areas of the commercial or industrial activities, not from the property lines of the activities, unless the property lines coincide with the limits of the regularly used buildings, parking lots, storage or processing areas and shall be along or parallel to the edge or pavement of the highway.
Ala. Code § 23-1-271 (1975)