§ 74.02 U-TURNS.
   It is unlawful for a driver to make a U-turn except at an intersection, however, U-turns are prohibited within the business district and at any intersection where a sign prohibiting U-turns is posted in accordance with Chapter 71 of this Traffic Code.
(Iowa Code § 321.255) (1999 Code, § 64.02) Penalty, see § 10.99