Question U-turns in residential districts are legal: Answers On a one-way street on a green arrow. When there are no vehicles approaching nearby. Across sets of solid double yellow lines. Explanation U-turns are permitted in residential areas if there are no vehicles approaching within 200 feet. They are also permitted when a traffic sign, light, or signal protects you from approaching vehicles. Take a FREE Practice Test Now This questions appears in the following tests: California Practice Test