a. If the curb is painted red, parking shall be prohibited in the area adjacent to the painted curbs at all times. Curbs painted red may also indicate bus loading zones, but only when accompanied by appropriate signs, in which case bus loading and unloading shall not be prohibited.

b. If the curb is painted yellow the space adjacent to the curb so painted shall be used exclusively by vehicles during the loading or unloading of freight during those hours designated by signs placed at either one or both ends of such zone.

c. Curb markings to show a time limit restriction of less than thirty minutes shall be green.

d. Taxicab standing areas shall be designated by signs only. (Code 1962, § 37-3.17)