For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
COMMERCIAL EXIT. Any vehicular exit from any automobile service station, shopping center, store, medical or professional center, or other similar public place.
CRITICAL VISIBILITY ZONE. The area within which the presence of obstructions to vision such as trees, shrubbery and signs could prevent the driver of a motor vehicle which is stopped behind the stop line of any street, highway, alley or commercial exit at its intersection with all other street or highway from seeing any other vehicle which is approaching on the intersection street or highway and is within 200 feet of the intersection.
SHRUBBERY. Any bush, hedge, flowering or ornamental plant, weed growth, low-growing evergreen, or other form of vegetation.
SIGN. Any temporary or permanent structure, banner, pennant or string of pennants, used for advertising or decorative purposes.
STOP LINE. The actual obedience line if there be one. If there is none, one shall be assumed to exist four feet before the nearest edge of the intersecting street or highway.
TREE. A large, wood, perennial plant having a clearly recognizable trunk.
('77 Code, § 17-61)