It is unlawful for any person to operate a motor vehicle by turning so as to proceed in the opposite direction upon any street except at a street intersection, and then only if the street intersection is not sign-posted prohibiting a U-turn or otherwise controlled by a traffic signal; provided, that any person making a permitted U-turn shall yield the right-of-way to all other vehicles.
(1988 Code, § 8.03) Penalty, see § 10.99