The operator of an access facility shall provide in an access area in his control for landscaping which promotes reasonable visibility of persons within such area by meeting each of the following standards:
(1) No bushes or shrubbery exceeding one foot in height shall be planted within a fifteen-foot radius of the access facility.
(2) Bushes and shrubbery outside the fifteen foot radius shall be maintained in a manner which promotes reasonable visibility of persons within the access area.
(3) Trees within the access area shall be trimmed upward to a minimum of six feet.