No person shall unnecessarily obstruct any street,
avenue, road, highway, alley or public place with any kind of vehicle
or with boxes, lumber, wood or any other thing; but the provisions
of this section shall not prevent persons who are building from occupying,
until notified by any Borough official to cease such occupancy, 1/2
of the street in front of the place where they are so building, unless
another person is building on the opposite side of the street, in
which case neither shall occupy more than 1/4 of the street. No person
who is building shall continue such occupancy of any street after
notice from any Borough official or police officer to discontinue
the same.