It is unlawful for any person to stop, park or angle park any vehicle upon a street in such a manner or under such conditions as to leave available less than 10 feet of the width of the roadway for free movement of vehicular traffic, except temporarily during the actual loading or unloading of passengers, or when necessary to avoid traffic conflict, or in obedience to traffic regulations or traffic signs or signals or a police officer. (Ord. 5212 § 1 (Exh. F), 1999; 1957 code § 9.22.090(A).)