No owner or person in charge of property shall plant, maintain or allow vegetation which is higher than 18 inches above the crown of the adjacent roadway in that portion of the right-of-way between the property line and the curb line within 35 feet from the intersection of curb lines, if extended, at any street, avenue or highway intersection. This provision shall also apply within 15 feet of the intersection of an alley with a street, avenue or highway right-of-way. Where curbs do not exist, no such use of right-of-way shall be made within 25 feet of the intersection of property lines if extended at the street, avenue, or highway intersection.